首页|Dimethylamine oxalate manipulating CsPbI3 perovskite film crystallization process for high efficiency carbon electrode based perovskite solar cells
Dimethylamine oxalate manipulating CsPbI3 perovskite film crystallization process for high efficiency carbon electrode based perovskite solar cells
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Crystallization process determines the quality of perovskite films and the performances of resultant per-ovskite solar cells(PSCs).Dimethylamine oxalate has been proven as a multifunctional modulator,and is explored as an efficient additive in manipulating the crystallization process of CsPbl3 perovskite films.On one hand,oxalate serves as the precipitator that facilitates the nucleation process of intermediate.The larger size of intermediate is conductive to the larger size and smaller grain boundaries of resultant per-ovskite.On the other hand,in subsequent annealing process,the phase conversion and growth process of transient perovskite can be decelerated due to the strong interactions of oxalate with both dimethy-lamine cation(DMA+)and Pb2+.Due to the optimized crystallization kinetics,the morphology and quality of CsPbl3 perovskite films are comprehensively improved with lower defect concentrations,and charge recombination loss is effectively suppressed.Benefiting from the optimized crystal quality of perovskite films,the carbon electrode-based CsPbI3 PSCs exhibit a champion efficiency of 18.48％.This represents one of the highest levels among all hole transport layer-free inorganic perovskite solar cells.
Solar cellsPerovskiteCsPbl3Carbon electrodesOxalate
Key Laboratory for Biobased Materials and Energy of Ministry of Education,College of Materials and Energy,South China Agricultural University,Guangzhou 510642,Guangdong,China
College of Chemistry and Civil Engineering,Shaoguan University,Shaoguan 512005,Guangdong,China
Guangdong Provincial Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northern Region,Shaoguan University,Shaoguan 512005,Guangdong,China
National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaScience and Technology Program of Guangzhou,ChinaChina Postdoctoral Science Foundation
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