Effect of Chemical Bonding Nature of Post-Treatment Materials on Photovoltaic Performance of Perovskite Solar Cells

被引：47

作者：

Kim, Jeong-Hyeon ^{[1
]}

Kim, Seul-Gi ^{[1
]}

Park, Nam-Gyu ^{[1
]}

机构：

[1] Sungkyunkwan Univ SKKU, Sch Chem Engn, Ctr Antibonding Regulated Crystals, Suwon 16419, South Korea

来源：

ACS ENERGY LETTERS | 2021年 / 6卷 / 10期

基金：

新加坡国家研究基金会;

关键词：

INFRARED-SPECTRA; HIGH-EFFICIENCY; HALIDE PEROVSKITES; PYRIDINE; INTERFACE; VALENCE; IODIDE;

D O I：

10.1021/acsenergylett.1c01376

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report here on the effect of chemical bonding nature of post-treatment materials on photovoltaic performance in perovskite solar cells using pyridinium iodide (PyI) with delocalized pi electrons and piperidinium iodide (PpI) without a pi bond. A gradual increase in power conversion efficiency (PCE) from 20.13% to 22.26% is observed as the PyI concentration increases from 0 to 40 mM, while PCE is optimized at relatively low concentration of 5 mM for PpI. It is found that a PyI layer is formed at the perovskite/HTL interface by the PyI treatment, which is beneficial for hole extraction even at increased interlayer thickness. On the other hand, an insulating 1-D PpPbI(3) formed by PpI treatment blocks charge separation, which is pronounced at high concentration. Our comprehensive comparative work on post-treatment materials delivers a message that different thicknesses for each material are required to achieve decent photovoltaic parameters.

引用

页码：3435 / 3442

页数：8

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