化学
阴极
兴奋剂
异质结
有机太阳能电池
电子
耗尽区
氧化铟锡
电极
聚合物太阳能电池
光电子学
纳米技术
太阳能电池
图层(电子)
物理化学
有机化学
材料科学
聚合物
物理
量子力学
作者
Yi Yang,Jingwen Wang,Xiao Yang,Bowei Xu,Jianhui Hou
标识
DOI:10.1002/cjoc.202300635
摘要
Comprehensive Summary Cathode interlayers (CILs) play an essential role in achieving efficient organic solar cells (OSCs). However, the electronic structure at the electrode/CIL/active layer interfaces and the underlying mechanisms for electron collection remain unclear, which becomes a major obstacle to develop high‐performance CILs. Herein, we investigate the relationship of the electron collection abilities of four cross‐linked and n ‐doped CILs ( c ‐NDI:P 0 , c ‐NDI:P 1 , c ‐NDI:P 2 , c ‐NDI:P 3 ) with their electronic structure of space charge region at heterojunction interface. By accurately calculating the depletion region width according to the barrier height, doping density and permittivity, we put forward that the optimal thickness of CIL should be consistent with the depletion region width to realize the minimum energy loss. As a result, the depletion region width is largely reduced from 13 nm to 0.8 nm at the indium tin oxide (ITO)/ c ‐NDI:P 0 interface, resulting in a decent PCE of 17.7% for the corresponding inverted OSCs.
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