钝化
钙钛矿(结构)
悬空债券
能量转换效率
材料科学
光伏
兴奋剂
结晶
光电子学
纳米技术
化学工程
硅
光伏系统
图层(电子)
工程类
生物
生态学
作者
Xiaoxuan Tang,Siwei Yi,Quan Yuan,Qianwen Shu,Daewoo Han,Lai Feng
出处
期刊:Solar RRL
[Wiley]
日期:2022-02-09
卷期号:6 (6): 2101013-2101013
被引量:8
标识
DOI:10.1002/solr.202101013
摘要
Organic-free perovskite solar cells (PSCs) have been of rising interest due to their remarkable resistance toward long-term thermal stress. Nevertheless, the inorganic perovskite films usually suffer from poor crystallization and high-density defects in bulk and near/at the interfaces, which leads to significant charge recombination loss and hence inferior device performance. Herein, it is demonstrated that high-quality CsPbI2Br perovskite films could be prepared by using 2D non-layered materials as additives, such as In2S3 nanoflakes (Nano-In2S3) with well-matched lattices and unsaturated dangling bonds on the surface. In addition, it is found that the introduction of Nano-In2S3 results in not only defect passivation but also remarkable quasi-Fermi level splitting across the perovskite film due to its gradient doping behavior, thereby enhancing the built-in electric field in the inverted PSCs. As a result, the optimal devices based on Nano-In2S3:CsPbI2Br absorber and all-inorganic interfacial layers deliver a champion power conversion efficiency of 15.17% along with excellent ambient and thermal stabilities, superior to those of the pristine devices and comparable to the best organic-free PSCs. A novel strategy for highly efficient and stable organic-free photovoltaics by using 2D non-layered materials as multifunctional additives is demonstrated.
科研通智能强力驱动
Strongly Powered by AbleSci AI