韩国能源研究所Dong Suk Kim团队开发了共形量子点-SnO2层作为高效钙钛矿太阳能电池的电子传输层。相关研究成果发表在2022年1月21日出版的《科学》。

钙钛矿型太阳能电池（PSCs）的改进集中于提高其功率转换效率（PCE）和操作稳定性，并在放大到模块尺寸时保持高性能。

研究人员报告在紧凑型二氧化钛上用一薄层聚丙烯酸稳定的tin（IV）氧化物量子点（paa-QD-SnO₂）取代常用的介孔二氧化钛电子传输层（ETL），增强了光捕获，并在很大程度上抑制了ETL-钙钛矿界面的非辐射复合。使用paa-QD-SnO₂作为电子选择性接触使PSCs（0.08平方厘米）具有25.7%（认证25.4%）的PCE和高操作稳定性，并促进PSCs向更大尺寸的扩展。使用面积为1、20和64平方厘米的PSCs的PCE分别为23.3%、21.7%和20.6%。

附：英文原文

Title: Conformal quantum dot–SnO2 layers as electron transporters for efficient perovskite solar cells

Author: Minjin Kim, Jaeki Jeong, Haizhou Lu, Tae Kyung Lee, Felix T. Eickemeyer, Yuhang Liu, In Woo Choi, Seung Ju Choi, Yimhyun Jo, Hak-Beom Kim, Sung-In Mo, Young-Ki Kim, Heunjeong Lee, Na Gyeong An, Shinuk Cho, Wolfgang R. Tress, Shaik M. Zakeeruddin, Anders Hagfeldt, Jin Young Kim, Michael Grtzel, Dong Suk Kim

Issue&Volume: 2022-01-21

Abstract: Improvements to perovskite solar cells (PSCs) have focused on increasing their power conversion efficiency (PCE) and operational stability and maintaining high performance upon scale-up to module sizes. We report that replacing the commonly used mesoporous–titanium dioxide electron transport layer (ETL) with a thin layer of polyacrylic acid–stabilized tin(IV) oxide quantum dots (paa-QD-SnO2) on the compact–titanium dioxide enhanced light capture and largely suppressed nonradiative recombination at the ETL–perovskite interface. The use of paa-QD-SnO2 as electron-selective contact enabled PSCs (0.08 square centimeters) with a PCE of 25.7% (certified 25.4%) and high operational stability and facilitated the scale-up of the PSCs to larger areas. PCEs of 23.3, 21.7, and 20.6% were achieved for PSCs with active areas of 1, 20, and 64 square centimeters, respectively.

DOI: abh1885

Source: https://www.science.org/doi/10.1126/science.abh1885