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
Perovskite solar cells(PSCs)have attracted widespread attention because of their remarkable efficiency,low cost,and ease of fabrication.However,the operational stability of the PSCs still suffers from the corrosion of...Perovskite solar cells(PSCs)have attracted widespread attention because of their remarkable efficiency,low cost,and ease of fabrication.However,the operational stability of the PSCs still suffers from the corrosion of metal electrodes induced by metal-halide reactions.Herein,we propose a feasible strategy for improving the stability of inverted PSCs by using magnetron-sputtered Mo rear electrodes.Coupled with a bismuth(Bi)buffer layer prepared by thermal evaporation,the damage from the magnetron sputtering process toward the underlayers can be effectively relieved.Consequently,based on the Bi+Mo bilayer electrode,the inverted PSCs with a NiMgLiO hole transport layer exhibited a power conversion efficiency(PCE)of 18.82%.In addition to their excellent stability at high temperatures,compact Mo films can inhibit the decomposition of Perovskite(Pvk)films in the devices.The PSCs with the Bi/Mo bilayer electrode maintained 97.9%of its initial efficiency,showing better stability than PSCs with the traditional Ag electrode after aging for 3000 h under continuous light illumination.展开更多
We propose to engineer qutrit-qutrit entanglement through resonant atom-cavity interaction assisted by moderate laser driving,study two parameter regimes,respectively,of asymmetric atom-laser coupling and of asymmetri...We propose to engineer qutrit-qutrit entanglement through resonant atom-cavity interaction assisted by moderate laser driving,study two parameter regimes,respectively,of asymmetric atom-laser coupling and of asymmetric atom-cavity coupling,and find that both the coupling regimes possess the advantage of short operation time,compared with the previous ones achieved by dispersive interaction,adiabatic passage,and even quantum Zeno dynamics.We check numerically the influences of the parameter fluctuations and dissipation on the scheme and show it to be robust.The scheme can also be generalized to other physical systems such as the ion trap.展开更多
We propose to deterministically realize the qutrit-qutrit maximal entanglement for two atoms held in separate cavities coupled by an optical resonator. We study such a system in the resonant regime and show that the l...We propose to deterministically realize the qutrit-qutrit maximal entanglement for two atoms held in separate cavities coupled by an optical resonator. We study such a system in the resonant regime and show that the laser-driven resonant dynamics allow for the fast and robust creation of qutrit-qutrit entanglement.展开更多
The wavelength modulation indices are measured based on harmonic amplitude ratio of 4famp/6famp (4famp and 6famp are the 4- and 6-th harmonic central peak amplitudes correspondingly) with the Doppler-free selective re...The wavelength modulation indices are measured based on harmonic amplitude ratio of 4famp/6famp (4famp and 6famp are the 4- and 6-th harmonic central peak amplitudes correspondingly) with the Doppler-free selective reflection modulation spectroscopy. The experiments for the 6S1/2(F = 4) → 6P3/2(F' = 5) transition of cesium D2 line with 30-MHz linewidth were carried out. The 4f- and 6f-harmonic signals were detected with two digital lock-in amplifiers separately. The maximum error for modulation indices measurement was ±0.1 within the range of m from 3 to 6. The non-linear modulation behaviour of an external cavity diode laser induced by voltage tuning was studied with this method. The method for modulation indices measurement does not require a solid etalon as usual for measuring the wavelength modulation depth and the absorption linewidth correspondingly.展开更多
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financially supported by the National Key Research and Development Project funding from the Ministry of Science and Technology of China (No.2021YFB3800104)the National Natural Science Foundation of China (Nos.52002140,U20A20252,62205187 and 21C-OP-202206)+4 种基金the Young Elite Scientists Sponsorship Program by CASTthe Selfdetermined and Innovative Research Funds of HUST (No.2020kfy XJJS008)the Natural Science Foundation of Hubei Province (No.2022CFA093)the Fundamental Research Program of Shanxi Province (No.202103021223032)the Innovation Project of Optics Valley Laboratory (No.OVL2021BG008)。
文摘Perovskite solar cells(PSCs)have attracted widespread attention because of their remarkable efficiency,low cost,and ease of fabrication.However,the operational stability of the PSCs still suffers from the corrosion of metal electrodes induced by metal-halide reactions.Herein,we propose a feasible strategy for improving the stability of inverted PSCs by using magnetron-sputtered Mo rear electrodes.Coupled with a bismuth(Bi)buffer layer prepared by thermal evaporation,the damage from the magnetron sputtering process toward the underlayers can be effectively relieved.Consequently,based on the Bi+Mo bilayer electrode,the inverted PSCs with a NiMgLiO hole transport layer exhibited a power conversion efficiency(PCE)of 18.82%.In addition to their excellent stability at high temperatures,compact Mo films can inhibit the decomposition of Perovskite(Pvk)films in the devices.The PSCs with the Bi/Mo bilayer electrode maintained 97.9%of its initial efficiency,showing better stability than PSCs with the traditional Ag electrode after aging for 3000 h under continuous light illumination.
基金Supported by the National Basic Research Program of China under Grant No 2012CB921601the National Natural Science Foundation of China under Grant Nos 11247283,11305037 and 11374054the Natural Science Foundation of Fujian Province under Grant No 2013J01012,and the Fund from Fuzhou University。
文摘We propose to engineer qutrit-qutrit entanglement through resonant atom-cavity interaction assisted by moderate laser driving,study two parameter regimes,respectively,of asymmetric atom-laser coupling and of asymmetric atom-cavity coupling,and find that both the coupling regimes possess the advantage of short operation time,compared with the previous ones achieved by dispersive interaction,adiabatic passage,and even quantum Zeno dynamics.We check numerically the influences of the parameter fluctuations and dissipation on the scheme and show it to be robust.The scheme can also be generalized to other physical systems such as the ion trap.
基金Supported by the National Basic Research Program of China under Grant No 2012CB921601, the National Natural Science Foundation of China under Grant Nos 11247283, 11305037, 11347114, and 11374054, the Natural Science Foundation of Fujian Province under Grant No 2013J01012, and the Fund from Fuzhou University.
文摘We propose to deterministically realize the qutrit-qutrit maximal entanglement for two atoms held in separate cavities coupled by an optical resonator. We study such a system in the resonant regime and show that the laser-driven resonant dynamics allow for the fast and robust creation of qutrit-qutrit entanglement.
基金This work was supported in part by the National Natural Science Foundation of China (Grant No. 10174047, 60078009) Natural Science Foundation of Shanxi Province.
文摘The wavelength modulation indices are measured based on harmonic amplitude ratio of 4famp/6famp (4famp and 6famp are the 4- and 6-th harmonic central peak amplitudes correspondingly) with the Doppler-free selective reflection modulation spectroscopy. The experiments for the 6S1/2(F = 4) → 6P3/2(F' = 5) transition of cesium D2 line with 30-MHz linewidth were carried out. The 4f- and 6f-harmonic signals were detected with two digital lock-in amplifiers separately. The maximum error for modulation indices measurement was ±0.1 within the range of m from 3 to 6. The non-linear modulation behaviour of an external cavity diode laser induced by voltage tuning was studied with this method. The method for modulation indices measurement does not require a solid etalon as usual for measuring the wavelength modulation depth and the absorption linewidth correspondingly.
