Vapor deposition is a promising technique for industrializing perovskite solar cells,but limited understanding of crystallization mechanisms in vapor-phase processes hampers progress.This study reveals a top-down crys...Vapor deposition is a promising technique for industrializing perovskite solar cells,but limited understanding of crystallization mechanisms in vapor-phase processes hampers progress.This study reveals a top-down crystallization growth mechanism during a two-step vapor-solid reaction and introduces an accelerated diffusion-buried homogeneous seed(AD-BHS)strategy.By utilizing the rapid diffusion of methylammonium chloride and inducing crystallization with buried seeds,we eliminate residual lead iodide,reduce crystallization time disparities across the film,and enhance uniformity.As a result,we achieve efficiencies of 22.40%for small-area(0.148 cm^(2))cells and 19.75%for large-area(10.0 cm^(2))modules,both representing state-of-the-art performance for vapor-solid reaction-based perovskite solar cells.This study provides critical insights into regulating crystallization growth in vapor-deposited perovskite thin films.展开更多
In this study, DERB1A transcription factor and stress-induced promoter rd29A were isolated respectively and amplified from Arabidopsis thaliana, se- quenced and analyzed by DNAsis. In addition, the stress-induced prom...In this study, DERB1A transcription factor and stress-induced promoter rd29A were isolated respectively and amplified from Arabidopsis thaliana, se- quenced and analyzed by DNAsis. In addition, the stress-induced promoter rd29A was utilized to construct the plant expression vector of DERB1A, which was transformed into Agrobacterium tumefaciens. Furthermore, the transgenic regeneration system of fresh-cut chrysanthemum from callus to plantlets was established successfully. On this basis, chrysanthemum leaf-disc explants were genetically transformed with Agrobacterium-mediated method. Two positive transgenie plantlets were obtained in vitro. Based on PCR detection, DREB1A transcription factor was integrated into chrysanthemum genome, which laid the foundation for breeding new transgenie cultivars of fresh-cut chrysanthemum with high comprehensive stress resistance, good cmalitv and high field.展开更多
Tin oxide has made a major breakthrough in high-efficiency perovskite solar cells(PSCs)as an efficient electron transport layer by the low-temperature chemical bath deposition method.However,tin oxide often contains p...Tin oxide has made a major breakthrough in high-efficiency perovskite solar cells(PSCs)as an efficient electron transport layer by the low-temperature chemical bath deposition method.However,tin oxide often contains pernicious defects,resulting in unsatisfactory performance.Herein,we develop high-quality tin oxide films via a nitrogen-doping strategy for high-efficiency and stable planar PSCs.The aligned energy level at the interface of doped SnO_(2)/perovskite,more excellent charge extraction and reduced nonradiative recombination contribute to the enhanced efficiency and stability.Correspondingly,the power conversion efficiency of the devices based on N‐SnO_(2) film increases to 23.41% from 20.55% of the devices based on the pristine SnO_(2).The N-SnO_(2) devices show an outstanding stability retaining 97.8% of the initial efficiency after steady-state output at a maximum power point for 600s under standard AM1.5G continuous illumination without encapsulation,while less than 50% efficiency remains for the devices based on pristine SnO_(2).This simple scalable strategy has shown great promise toward highly efficient and stable PSCs.展开更多
基金financial support by the Joint Foundation for Innovation and Development of Hubei Natural Science Foundation(2023AFD032)Hubei Provincial Natural Science Foundation of China(2023AFA010)。
文摘Vapor deposition is a promising technique for industrializing perovskite solar cells,but limited understanding of crystallization mechanisms in vapor-phase processes hampers progress.This study reveals a top-down crystallization growth mechanism during a two-step vapor-solid reaction and introduces an accelerated diffusion-buried homogeneous seed(AD-BHS)strategy.By utilizing the rapid diffusion of methylammonium chloride and inducing crystallization with buried seeds,we eliminate residual lead iodide,reduce crystallization time disparities across the film,and enhance uniformity.As a result,we achieve efficiencies of 22.40%for small-area(0.148 cm^(2))cells and 19.75%for large-area(10.0 cm^(2))modules,both representing state-of-the-art performance for vapor-solid reaction-based perovskite solar cells.This study provides critical insights into regulating crystallization growth in vapor-deposited perovskite thin films.
基金Supported by Natural Science Foundation of Yunnan Province(2007C213M)Provincial Key Discipline of Landscape Plant&Ornamental Horticulture of Yunnan Province+1 种基金Provincial Key Lab of Colleges and Universities in Landscape Plants and Ornamental Horticulture of Yunnan ProvinceLarge Apparatuses Sharing Platform of Southwest Forestry University
文摘In this study, DERB1A transcription factor and stress-induced promoter rd29A were isolated respectively and amplified from Arabidopsis thaliana, se- quenced and analyzed by DNAsis. In addition, the stress-induced promoter rd29A was utilized to construct the plant expression vector of DERB1A, which was transformed into Agrobacterium tumefaciens. Furthermore, the transgenic regeneration system of fresh-cut chrysanthemum from callus to plantlets was established successfully. On this basis, chrysanthemum leaf-disc explants were genetically transformed with Agrobacterium-mediated method. Two positive transgenie plantlets were obtained in vitro. Based on PCR detection, DREB1A transcription factor was integrated into chrysanthemum genome, which laid the foundation for breeding new transgenie cultivars of fresh-cut chrysanthemum with high comprehensive stress resistance, good cmalitv and high field.
基金This study is financially supported by the National Key Research and Development Plan(2019YFE0107200,2017YFE0131900)National Natural Science Foundation of China(21875178,52172230,91963209)+1 种基金Fundamental Research Funds for the Central Universities(WUT:202443004)Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory(XDT2020-001,XHT2020-005).
文摘Tin oxide has made a major breakthrough in high-efficiency perovskite solar cells(PSCs)as an efficient electron transport layer by the low-temperature chemical bath deposition method.However,tin oxide often contains pernicious defects,resulting in unsatisfactory performance.Herein,we develop high-quality tin oxide films via a nitrogen-doping strategy for high-efficiency and stable planar PSCs.The aligned energy level at the interface of doped SnO_(2)/perovskite,more excellent charge extraction and reduced nonradiative recombination contribute to the enhanced efficiency and stability.Correspondingly,the power conversion efficiency of the devices based on N‐SnO_(2) film increases to 23.41% from 20.55% of the devices based on the pristine SnO_(2).The N-SnO_(2) devices show an outstanding stability retaining 97.8% of the initial efficiency after steady-state output at a maximum power point for 600s under standard AM1.5G continuous illumination without encapsulation,while less than 50% efficiency remains for the devices based on pristine SnO_(2).This simple scalable strategy has shown great promise toward highly efficient and stable PSCs.
