钙钛矿(结构)
图层(电子)
接口(物质)
材料科学
传输层
钙钛矿太阳能电池
太阳能电池
光电子学
化学
工程物理
纳米技术
物理
复合材料
结晶学
毛细管数
毛细管作用
作者
Qiaoli Niu,Wei Hua,Jing Yang,Baoxiang Chai,Yuqing Chen,Juan Xiong,Wenjin Zeng,Xinwen Peng,Usisipho Feleni,Ruidong Xia
标识
DOI:10.1016/j.synthmet.2024.117615
摘要
Poly (9-vinylcarbazole) (PVK) is an attractive hole transport material for organometallic-halide perovskite solar cell (PSC) because of its excellent hole transport ability and great film-forming property. Nowadays, the PVK hole-transport-layer (HTL) based PSC suffered from low power conversion efficiency (PCE), which mainly caused by bad interface contact between PVK and perovskite film, including the energy level mismatch. Doing PVK is an effective and facial method to modify the buried interface of perovskite film. In this work, 1,1-bis [(di-4-tolylamino)phenyl]cyclohexane (TAPC) was added into PVK HTL. Experimental results show that a highest occupied molecular orbital (HOMO) level elevation was achieved after doping TAPC. Meanwhile perovskite films with increased crystallinity, reduced defect density and enhanced light absorbance were obtained. Finally, the PCE of PSCs were enhanced from 10.81% of the control device to 15.65% of PVK+40% TAPC device. The reason that responsible for the energy level lifting, morphology improvement and performance enhancement were thoroughly investigated and analyzed. This work provides an alternative option for the dopant in PVK to improve the buried interface of perovskite film, and therefore, the performance of PSCs.
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