3D nanographene precursor suppress interfacial recombination in PEDOT: PSS based perovskite solar cells

Chintam Hanmandlu, Rohan Paste, Hsinhan Tsai, Shyam Narayan Singh Yadav, Kuan Wen Lai, Yen Yu Wang, Chandra Shekar Gantepogu, Chen Hung Hou, Jing Jong Shyue, Yu Jung Lu, Tushar Sanjay Jadhav, Jian Ming Liao, Hsien Hsin Chou, Hui Qi Wong, Ta Jen Yen, Chao Sung Lai, Dibyajyoti Ghosh, Sergei Tretiak, Hung Ju Yen*, Chih Wei Chu*

*此作品的通信作者

研究成果: 期刊稿件文章同行評審

9 引文 斯高帕斯(Scopus)

摘要

Decreasing the number of interfacial defect states and enhancing the charge transfer ability of charge transport layers have become promising strategies for increasing the efficiency and stability of perovskite solar cells (PSCs). In this study, we used a holistic interface strategy, employing three-dimensional (3D) triphenylamine-based nanographene (NG) precursors with well-defined molecular structures and presenting various functional units (F, Br, and OMe), to achieve efficient inverted PSCs. The 3D NG precursor formed a bridge between the perovskite film and the poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) hole transport layer (HTL) with minimized interfacial defect states, while also passivating defect states at the bulk perovskite through automatic bottom-up passivation. Computational simulations and experimental findings revealed that the functional groups of the 3D NG precursors anchored the perovskites through the formation of strong F···Pb, Br···Pb, and OMe···Pb coordination bonds. Through these synergetic properties, inverted PSCs delivered great enhancements in their photovoltaics performance characteristics, with the improvement in absolute efficiency exceeding 3 %. This new practical approach toward interfacial engineering of inverted PSCs appears to enhance their PCEs and thermal, light soaking, and long term stabilities.

原文英語
文章編號108136
頁(從 - 到)108136 - 108136
頁數1
期刊Nano Energy
107
DOIs
出版狀態已出版 - 03 2023

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