钝化
钙钛矿(结构)
材料科学
兴奋剂
氯化胆碱
化学工程
相对湿度
图层(电子)
离子
能量转换效率
纳米技术
光电子学
化学
有机化学
物理
工程类
热力学
作者
Xiangxin Meng,Qing Sun,Bo Shen,Die Hu,Bonan Kang,S. Ravi P. Silva,Lijun Wang
出处
期刊:Small
[Wiley]
日期:2024-01-14
卷期号:20 (25)
被引量:1
标识
DOI:10.1002/smll.202310275
摘要
Abstract The interfacial carrier non‐radiative recombination caused by buried defects in electron transport layer (ETL) material and the energy barrier severely hinders further improvement in efficiency and stability of perovskite solar cells (PSCs). In this study, the effect of the SnO 2 ETL doped with choline chloride (CC), acetylcholine chloride (AC), and phosphocholine chloride sodium salt (PCSS) are investigated. These dopants modify the interface between SnO 2 ETL and perovskite layer, acting as a bridge through synergistic effects to form uniform ETL films, enhance the interface contact, and passivate defects. Ultimately, compared with CC (which with ─OH) and AC (which with C═O), the PCSS with P═O and sodium ions groups is more beneficial for improving performance. The device based on PCSS‐doped SnO 2 ETL achieves an efficiency of 23.06% with a high V OC of 1.2 V, which is considerably higher than the control device (20.55%). Moreover, after aging for 500 h at a temperature of 25 °C and relative humidity (RH) of 30–40%, the unsealed device based on SnO 2 ‐PCSS ETL maintains 94% of its initial efficiency, while the control device only 80%. This study provides a meaningful reference for the design and selection of ideal pre‐buried additive molecules.
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