Single-pixel imaging(SPI)enables efficient sensing in challenging conditions.However,the requirement for numerous samplings constrains its practicality.We address the challenge of high-quality SPI reconstruction at ul...Single-pixel imaging(SPI)enables efficient sensing in challenging conditions.However,the requirement for numerous samplings constrains its practicality.We address the challenge of high-quality SPI reconstruction at ultra-low sampling rates.We develop an alternative optimization with physics and a data-driven diffusion network(APD-Net).It features alternative optimization driven by the learned task-agnostic natural image prior and the task-specific physics prior.During the training stage,APD-Net harnesses the power of diffusion models to capture data-driven statistics of natural signals.In the inference stage,the physics prior is introduced as corrective guidance to ensure consistency between the physics imaging model and the natural image probability distribution.Through alternative optimization,APD-Net reconstructs data-efficient,high-fidelity images that are statistically and physically compliant.To accelerate reconstruction,initializing images with the inverse SPI physical model reduces the need for reconstruction inference from 100 to 30 steps.Through both numerical simulations and real prototype experiments,APD-Net achieves high-quality,full-color reconstructions of complex natural images at a low sampling rate of 1%.In addition,APD-Net’s tuning-free nature ensures robustness across various imaging setups and sampling rates.Our research offers a broadly applicable approach for various applications,including but not limited to medical imaging and industrial inspection.展开更多
Over the last decade,remarkable progress has been made in metal halide perovskite solar cells(PSCs),which have been a focus of emerging photovoltaic techniques and show great potential for commercialization.However,th...Over the last decade,remarkable progress has been made in metal halide perovskite solar cells(PSCs),which have been a focus of emerging photovoltaic techniques and show great potential for commercialization.However,the upscaling of small-area PSCs to large-area solar modules to meet the demands of practical applications remains a significant challenge.The scalable production of high-quality perovskite films by a simple,reproducible process is crucial for resolving this issue.Furthermore,the crystallization behavior in the solution-processed fabrication of perovskite films can be strongly influenced by the physicochemical properties of the precursor inks,which are significantly affected by the employed solvents and their interactions with the solutes.Thus,a comprehensive understanding of solvent engineering for fabricating perovskite films over large areas is urgently required.In this paper,we first analyze the role of solvents in the solution-processed fabrication of large-area perovskite films based on the classical crystal nucleation and growth mechanism.Recent efforts in solvent engineering to improve the quality of perovskite films for solar modules are discussed.Finally,the basic principles and future challenges of solvent system design for scalable fabrication of high-quality perovskite films for efficient solar modules are proposed.展开更多
The booming growth of organic-inorganic hybrid lead halide perovskite solar cells have made this promising photovoltaic technology to leap towards commercialization.One of the most important issues for the evolution f...The booming growth of organic-inorganic hybrid lead halide perovskite solar cells have made this promising photovoltaic technology to leap towards commercialization.One of the most important issues for the evolution from research to practical application of this technology is to achieve high-throughput manufacturing of large-scale perovskite solar modules.In particular,realization of scalable fabrication of large-area perovskite films is one of the essential steps.During the past ten years,a great number of approaches have been developed to deposit high quality perovskite films,to which additives are introduced during the fabrication process of perovskite layers in terms of the perovskite grain growth control,defect reduction,stability enhancement,etc.Herein,we first review the recent progress on additives during the fabrication of large area perovskite films for large scale perovskite solar cells and modules.We then focus on a comprehensive and in-depth understanding of the roles of additives for perovskite grain growth control,defects reduction,and stability enhancement.Further advancement of the scalable fabrication of high-quality perovskite films and solar cells using additives to further develop large area,stable perovskite solar cells are discussed.展开更多
Radio-photovoltaic cell is a micro nuclear battery for devices operating in extreme environments,which converts the decay energy of a radioisotope into electric energy by using a phosphor and a photovoltaic converter....Radio-photovoltaic cell is a micro nuclear battery for devices operating in extreme environments,which converts the decay energy of a radioisotope into electric energy by using a phosphor and a photovoltaic converter.Many phosphors with high light yield and good environmental stability have been developed,but the performance of radio-photovoltaic cells remains far behind expectations in terms of power density and power conversion efficiency,because of the poor photoelectric conversion efficiency of traditional photovoltaic converters under low-light conditions.This paper reports an radio-photovoltaic cell based on an intrinsically stable formamidinium-cesium perovskite photovoltaic converter exhibiting a wide light wavelength response from 300 to 800 nm,high open-circuit voltage(V_(oc)),and remarkable efficiency at low-light intensity.When a He ions accelerator is adopted as a mimickedαradioisotope source with an equivalent activity of 0.83 mCi cm^(-2),the formamidinium-cesium perovskite radio-photovoltaic cell achieves a V_(oc)of 0.498 V,a short-circuit current(J_(sc))of 423.94 nA cm^(-2),and a remarkable power conversion efficiency of 0.886%,which is 6.6 times that of the Si reference radio-photovoltaic cell,as well as the highest among all radio-photovoltaic cells reported so far.This work provides a theoretical basis for enhancing the performance of radio-photovoltaic cells.展开更多
Defect-induced charge carrier recombination at the interfaces between perovskite and adjacent charge transport layers restricts further improvements in the device performance of perovskite solar cells(PSCs).Defect pas...Defect-induced charge carrier recombination at the interfaces between perovskite and adjacent charge transport layers restricts further improvements in the device performance of perovskite solar cells(PSCs).Defect passivation at these interfaces can reduce trap states and inhibit the induced nonradiative recombination.Herein,we report a double-sided interfacial passivation via simply evaporating potassium chloride(DIP-KCl)at both the hole transport layer(HTL)/perovskite and perovskite/electron transport layer(ETL)interfaces in inverted planar PSCs.We demonstrate that the bottom KCl layer at the HTL/perovskite interface not only reduces the interfacial defects and improves the interfacial contact,but also leads to increased perovskite crystallinity,while the top KCl layer at the perovskite/ETL interface efficiently passivates the perovskite top surface defects and facilitates electron extraction at this interface.Thus,suppressed nonradiative recombination and faster charge extraction at both interfaces close to the perovskite layer can be achieved by using our DIP-KCl strategy.As a result,inverted PSCs based on DIP-KCl present an increased efficiency from 17.1% to 19.2% and enhanced stability,retaining over 90% of their initial efficiency after aging at maximum power point tracking for 1000 h.This work provides a simple and efficient way for defect passivation to further increase the efficiency and stability of PSCs.展开更多
Compared with the power conversion efficicency,the operational stability of perovskite solar cells(PsCs)remains a major challenge hampering its commercialization.However,conducting a light soaking test under 1 sun ill...Compared with the power conversion efficicency,the operational stability of perovskite solar cells(PsCs)remains a major challenge hampering its commercialization.However,conducting a light soaking test under 1 sun illumination to get a long lifetime is time-consuming and experimentally inefficient.Here,we report an accelerated stability test protocol by aging PsCs under high-intensity light illumination to accelerate the evaluation of their operation stability.It is found that the efficiency degradation rate of a typical inverted PsC is almost linearly dependent on the light intensity within the range of 1 to 4 suns regardless of the encapsulations.The results prove that it can save the light-soaking time by at least 4 times to predict the operation lifetime on the basis of the equivalent light irradiation dose.展开更多
The fast crystallization and facile oxidation of Sn^(2+)of tin-lead(Sn-Pb)perovskites are the biggest challenges for their applications in high-performance near-infrared(NIR)photodetectors and imagers.Here,we introduc...The fast crystallization and facile oxidation of Sn^(2+)of tin-lead(Sn-Pb)perovskites are the biggest challenges for their applications in high-performance near-infrared(NIR)photodetectors and imagers.Here,we introduce a multifunctional diphenyl sulfoxide(DPSO)molecule into perovskite precursor ink to response these issues by revealing its strong binding interactions with the precursor species.The regulated perovskite film exhibits a dense morphology,reduced defect density and prolonged carrier diffusion length.The manufactured self-powered photodetector realizes a spectral response of 300-1100 nm,dark current density of 4.7×10^(−8)mA cm^(−2),peak responsivity of 0.49 A W^(−1)and specific detectivity of 1.20×10^(12)Jones in NIR region(780-1100 nm),-3 dB bandwidth of 11.4 MHz,linear dynamic range of 174 dB,and ultrafast rise/fall time of 14.2/17.1 ns,respectively.We demonstrate a 64×64 NIR imager with an impressive spatial resolution of 1.32 lp mm^(−1)by monolithically integrating the photodetector with a commercial thin-film transistor readout circuit.展开更多
Despite significant improvements in photo-electricity conversion efficiency of perovskite solar cells(PSCs)over the past several years,this emerging photovoltaic technology is still years away from large-scale commerc...Despite significant improvements in photo-electricity conversion efficiency of perovskite solar cells(PSCs)over the past several years,this emerging photovoltaic technology is still years away from large-scale commercial application.In this review,important research progresses on PSCs’‘golden triangle’parameters of efficiency,stability,and cost in literatures were objectively analyzed.We focused on their key bottlenecks and distinct contradictions hindering their fast commercialization.We also proposed the most urgent directions requiring intensive research and development input in the coming years to speed up the commercialization process of PSCs.展开更多
Single-pixel imaging(SPI)faces significant challenges in reconstructing high-quality images under complex real-world degradation conditions.This paper presents an innovative degradation model for the physical processe...Single-pixel imaging(SPI)faces significant challenges in reconstructing high-quality images under complex real-world degradation conditions.This paper presents an innovative degradation model for the physical processes in SPI,providing the first comprehensive and quantitative analysis of various SPI noise sources encountered in real-world applications.Especially,pattern-dependent global noise propagation and object jitter modelling methods for SPI are proposed.Subsequently,a deep-blind neural network is developed to remove the necessity of obtaining parameters of all the degradation factors in real-world image compensation.Our method can operate without degradation parameters and significantly improve the resolution and fidelity of SPI image reconstruction.The deep-blind network training is guided by the proposed comprehensive SPI degradation model that describes real-world SPI impairments,enabling the network to generalize across a wide range of degradation combinations.The experiment validates its advanced performance in real-world SPI imaging at ultra-low sampling rates.The proposed method holds great potential for applications in remote sensing,biomedical imaging,and privacy-preserving surveillance.展开更多
基金upported by the National Natural Science Foundation of China(Grant No.62305184)the Major Key Project of Pengcheng Laboratory(Grant No.PCL2024A1)+1 种基金the Basic and Applied Basic Research Foundation of Guangdong Province(Grant No.2023A1515012932)the Science,Technology and Innovation Commission of Shenzhen Municipality(Grant No.WDZC20220818100259004).
文摘Single-pixel imaging(SPI)enables efficient sensing in challenging conditions.However,the requirement for numerous samplings constrains its practicality.We address the challenge of high-quality SPI reconstruction at ultra-low sampling rates.We develop an alternative optimization with physics and a data-driven diffusion network(APD-Net).It features alternative optimization driven by the learned task-agnostic natural image prior and the task-specific physics prior.During the training stage,APD-Net harnesses the power of diffusion models to capture data-driven statistics of natural signals.In the inference stage,the physics prior is introduced as corrective guidance to ensure consistency between the physics imaging model and the natural image probability distribution.Through alternative optimization,APD-Net reconstructs data-efficient,high-fidelity images that are statistically and physically compliant.To accelerate reconstruction,initializing images with the inverse SPI physical model reduces the need for reconstruction inference from 100 to 30 steps.Through both numerical simulations and real prototype experiments,APD-Net achieves high-quality,full-color reconstructions of complex natural images at a low sampling rate of 1%.In addition,APD-Net’s tuning-free nature ensures robustness across various imaging setups and sampling rates.Our research offers a broadly applicable approach for various applications,including but not limited to medical imaging and industrial inspection.
基金financially supported by the National Key Research and Development Project funding from the Ministry of Science and Technology of China(2021YFB3800104)the National Natural Science Foundation of China(51822203,52002140,U20A20252,51861145404,62105293,62205187)+4 种基金the Young Elite Scientists Sponsorship Program by CAST,the Self-determined and Innovative Research Funds of HUST(2020KFYXJJS008)the Natural Science Foundation of Hubei Province(ZRJQ2022000408)the Shenzhen Science and Technology Innovation Committee(JCYJ20180507182257563)Fundamental Research Program of Shanxi Province(202103021223032)the Innovation Project of Optics Valley Laboratory of China(OVL2021BG008)。
文摘Over the last decade,remarkable progress has been made in metal halide perovskite solar cells(PSCs),which have been a focus of emerging photovoltaic techniques and show great potential for commercialization.However,the upscaling of small-area PSCs to large-area solar modules to meet the demands of practical applications remains a significant challenge.The scalable production of high-quality perovskite films by a simple,reproducible process is crucial for resolving this issue.Furthermore,the crystallization behavior in the solution-processed fabrication of perovskite films can be strongly influenced by the physicochemical properties of the precursor inks,which are significantly affected by the employed solvents and their interactions with the solutes.Thus,a comprehensive understanding of solvent engineering for fabricating perovskite films over large areas is urgently required.In this paper,we first analyze the role of solvents in the solution-processed fabrication of large-area perovskite films based on the classical crystal nucleation and growth mechanism.Recent efforts in solvent engineering to improve the quality of perovskite films for solar modules are discussed.Finally,the basic principles and future challenges of solvent system design for scalable fabrication of high-quality perovskite films for efficient solar modules are proposed.
基金supported by the Energy Materials and Surface Sciences Unit of the Okinawa Institute of Science and Technology Graduate Universitythe OIST R&D Cluster Research Program+1 种基金the OIST Proof of Concept(POC)ProgramJSPS KAKENHI Grant Number JP18K05266。
文摘The booming growth of organic-inorganic hybrid lead halide perovskite solar cells have made this promising photovoltaic technology to leap towards commercialization.One of the most important issues for the evolution from research to practical application of this technology is to achieve high-throughput manufacturing of large-scale perovskite solar modules.In particular,realization of scalable fabrication of large-area perovskite films is one of the essential steps.During the past ten years,a great number of approaches have been developed to deposit high quality perovskite films,to which additives are introduced during the fabrication process of perovskite layers in terms of the perovskite grain growth control,defect reduction,stability enhancement,etc.Herein,we first review the recent progress on additives during the fabrication of large area perovskite films for large scale perovskite solar cells and modules.We then focus on a comprehensive and in-depth understanding of the roles of additives for perovskite grain growth control,defects reduction,and stability enhancement.Further advancement of the scalable fabrication of high-quality perovskite films and solar cells using additives to further develop large area,stable perovskite solar cells are discussed.
基金the financial support from the National Natural Science Foundation of China(grant numbers 11922507,12050005,52002140)Fundamental Research Funds for the Central Universities(2020kfyXJJS008)+1 种基金Major State Basic Research Development Program of China(2021YFB3201000)Young Elite Scientists Sponsorship Program by CAST
文摘Radio-photovoltaic cell is a micro nuclear battery for devices operating in extreme environments,which converts the decay energy of a radioisotope into electric energy by using a phosphor and a photovoltaic converter.Many phosphors with high light yield and good environmental stability have been developed,but the performance of radio-photovoltaic cells remains far behind expectations in terms of power density and power conversion efficiency,because of the poor photoelectric conversion efficiency of traditional photovoltaic converters under low-light conditions.This paper reports an radio-photovoltaic cell based on an intrinsically stable formamidinium-cesium perovskite photovoltaic converter exhibiting a wide light wavelength response from 300 to 800 nm,high open-circuit voltage(V_(oc)),and remarkable efficiency at low-light intensity.When a He ions accelerator is adopted as a mimickedαradioisotope source with an equivalent activity of 0.83 mCi cm^(-2),the formamidinium-cesium perovskite radio-photovoltaic cell achieves a V_(oc)of 0.498 V,a short-circuit current(J_(sc))of 423.94 nA cm^(-2),and a remarkable power conversion efficiency of 0.886%,which is 6.6 times that of the Si reference radio-photovoltaic cell,as well as the highest among all radio-photovoltaic cells reported so far.This work provides a theoretical basis for enhancing the performance of radio-photovoltaic cells.
基金financially supported by the National Natural Science Foundation of China,China(51672094,51861145404,51822203,and 11627801)the National Key Research and Development Program of China,China(2016YFA0201001)+4 种基金the China Postdoctoral Science Foundation(2016M602286)the Fundamental Research Funds for the Central Universities,China(2016JCTD111,2018RCPY003,2020kfy XJJS008)the Shenzhen Science and Technology Innovation Committee,China(JCYJ20170307165905513,JCYJ20180507182257563)the Natural Science Foundation of Guangdong Province,China(2017A030313342)the Outstanding Young Talent Research Fund of Zhengzhou University,China。
文摘Defect-induced charge carrier recombination at the interfaces between perovskite and adjacent charge transport layers restricts further improvements in the device performance of perovskite solar cells(PSCs).Defect passivation at these interfaces can reduce trap states and inhibit the induced nonradiative recombination.Herein,we report a double-sided interfacial passivation via simply evaporating potassium chloride(DIP-KCl)at both the hole transport layer(HTL)/perovskite and perovskite/electron transport layer(ETL)interfaces in inverted planar PSCs.We demonstrate that the bottom KCl layer at the HTL/perovskite interface not only reduces the interfacial defects and improves the interfacial contact,but also leads to increased perovskite crystallinity,while the top KCl layer at the perovskite/ETL interface efficiently passivates the perovskite top surface defects and facilitates electron extraction at this interface.Thus,suppressed nonradiative recombination and faster charge extraction at both interfaces close to the perovskite layer can be achieved by using our DIP-KCl strategy.As a result,inverted PSCs based on DIP-KCl present an increased efficiency from 17.1% to 19.2% and enhanced stability,retaining over 90% of their initial efficiency after aging at maximum power point tracking for 1000 h.This work provides a simple and efficient way for defect passivation to further increase the efficiency and stability of PSCs.
基金financially supported by the Ministry of Science and Technology of China (2021YFB3800104)the National Natural Science Foundation of China (52002140, U20A20252)+3 种基金the Young Elite Scientists Sponsorship Program by CASTthe Selfdetermined and Innovative Research Funds of HUST(2020kfyXJJS008)the Natural Science Foundation of Hubei Province (2022CFA093)the Innovation Project of Optics Valley Laboratory (Grant No. OVL2021BG008)
文摘Compared with the power conversion efficicency,the operational stability of perovskite solar cells(PsCs)remains a major challenge hampering its commercialization.However,conducting a light soaking test under 1 sun illumination to get a long lifetime is time-consuming and experimentally inefficient.Here,we report an accelerated stability test protocol by aging PsCs under high-intensity light illumination to accelerate the evaluation of their operation stability.It is found that the efficiency degradation rate of a typical inverted PsC is almost linearly dependent on the light intensity within the range of 1 to 4 suns regardless of the encapsulations.The results prove that it can save the light-soaking time by at least 4 times to predict the operation lifetime on the basis of the equivalent light irradiation dose.
基金financially supported by the National Key Research and Development Program of China(2022YFA1404201)the National Natural Science Foundation of China(62205187,U23A20380,U22A2091,62222509,62127817,62075120,62075122,and 62105193)+1 种基金the Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China(IRT_17R70)the Fund for Shanxi“1331 Project”Key Subjects Construction,the Fundamental Research Program of Shanxi Province(202103021223032,202203021222107).
文摘The fast crystallization and facile oxidation of Sn^(2+)of tin-lead(Sn-Pb)perovskites are the biggest challenges for their applications in high-performance near-infrared(NIR)photodetectors and imagers.Here,we introduce a multifunctional diphenyl sulfoxide(DPSO)molecule into perovskite precursor ink to response these issues by revealing its strong binding interactions with the precursor species.The regulated perovskite film exhibits a dense morphology,reduced defect density and prolonged carrier diffusion length.The manufactured self-powered photodetector realizes a spectral response of 300-1100 nm,dark current density of 4.7×10^(−8)mA cm^(−2),peak responsivity of 0.49 A W^(−1)and specific detectivity of 1.20×10^(12)Jones in NIR region(780-1100 nm),-3 dB bandwidth of 11.4 MHz,linear dynamic range of 174 dB,and ultrafast rise/fall time of 14.2/17.1 ns,respectively.We demonstrate a 64×64 NIR imager with an impressive spatial resolution of 1.32 lp mm^(−1)by monolithically integrating the photodetector with a commercial thin-film transistor readout circuit.
基金the financial support from the National Key Research and Development Project funding from the Ministry of Science and Technology of China(2021YFB3800104)the Young Elite Scientists Sponsorship Program by CAST,the Natural Science Foundation of Hubei Province(ZRMS2020001132)+3 种基金the National Natural Science Foundation of China(51822203,51861145404,52002140,U20A20252,62105293)the Self-determined and Innovative Research Funds of HUST(2020kfyXJJS008)the Shenzhen Science and Technology Innovation Committee(JCYJ20180507182257563)the Innovation Project of Optics Valley Laboratory(OVL2021BG008).
文摘Despite significant improvements in photo-electricity conversion efficiency of perovskite solar cells(PSCs)over the past several years,this emerging photovoltaic technology is still years away from large-scale commercial application.In this review,important research progresses on PSCs’‘golden triangle’parameters of efficiency,stability,and cost in literatures were objectively analyzed.We focused on their key bottlenecks and distinct contradictions hindering their fast commercialization.We also proposed the most urgent directions requiring intensive research and development input in the coming years to speed up the commercialization process of PSCs.
基金National Natural Science Foundation of China(62305184)Science,Technology and Innovation Commission of Shenzhen Municipality(JCYJ20241202123919027)+1 种基金Science,Technology and Innovation Commission of Shenzhen Municipality(WDZC20220818100259004)Basic and Applied Basic Research Foundation of Guangdong Province(2023A1515012932).
文摘Single-pixel imaging(SPI)faces significant challenges in reconstructing high-quality images under complex real-world degradation conditions.This paper presents an innovative degradation model for the physical processes in SPI,providing the first comprehensive and quantitative analysis of various SPI noise sources encountered in real-world applications.Especially,pattern-dependent global noise propagation and object jitter modelling methods for SPI are proposed.Subsequently,a deep-blind neural network is developed to remove the necessity of obtaining parameters of all the degradation factors in real-world image compensation.Our method can operate without degradation parameters and significantly improve the resolution and fidelity of SPI image reconstruction.The deep-blind network training is guided by the proposed comprehensive SPI degradation model that describes real-world SPI impairments,enabling the network to generalize across a wide range of degradation combinations.The experiment validates its advanced performance in real-world SPI imaging at ultra-low sampling rates.The proposed method holds great potential for applications in remote sensing,biomedical imaging,and privacy-preserving surveillance.
