Han Jianhua, Yin Xuewen, Zhou Yu, Nan Hui, Gu Youchen, Tai Meiqian, Li Jianbao, Lin Hong
State Key Laboratory of New Ceramics & Fine Processing, School of Materials Science and Engineering , Tsinghua University , Beijing 10084 , China.
State Key Laboratory of Marine Resource Utilization in South China Sea , Hainan University , Haikou 570228 , China.
ACS Appl Mater Interfaces. 2018 Dec 12;10(49):42328-42334. doi: 10.1021/acsami.8b15399. Epub 2018 Nov 30.
The performance of low-temperature carbon-based perovskite solar cells (C-PSCs) with high commercial potential was hampered by the inferior interface between the absorber and carbon electrode. In this work, poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) was dissolved in an antisolvent for spin-coating perovskite (CHNHPbI, MAPI) films, which was applied to modify both the MAPI films and the interface between the MAPI layer and carbon electrode by gradient engineering. Finally, the C-PSCs based on MAPI-PTAA gradient bulk heterojunction films achieved a power conversion efficiency of 13.0% with an active area of 1 cm, 26% higher than that of pristine MAPI cells, because of the passivated trap states, accelerated hole extraction, and improved crystalline properties in absorber films.
具有高商业潜力的低温碳基钙钛矿太阳能电池（C-PSC）的性能受到吸收层与碳电极之间不良界面的阻碍。在这项工作中，聚[双（4-苯基）（2,4,6-三甲基苯基）胺]（PTAA）溶解在用于旋涂钙钛矿（CHNH PbI，MAPI）薄膜的反溶剂中，通过梯度工程将其应用于修饰MAPI薄膜以及MAPI层与碳电极之间的界面。最终，基于MAPI-PTAA梯度体异质结薄膜的C-PSC在1平方厘米的活性面积下实现了13.0%的功率转换效率，比原始MAPI电池高出26%，这归因于吸收层薄膜中的陷阱态钝化、空穴提取加速以及结晶性能改善。
