量子点
钝化
材料科学
配体(生物化学)
光伏系统
能量转换效率
纳米技术
光电子学
化学
生态学
生物化学
生物
受体
图层(电子)
作者
Zhengyan Zhang,Song‐De Han,Wenran Wang,Huashang Rao,Yueping Fang,Zhenxiao Pan,Xinhua Zhong
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2022-12-21
卷期号:8 (1): 647-656
被引量:8
标识
DOI:10.1021/acsenergylett.2c02270
摘要
In quantum dot sensitized solar cells (QDSCs), high loading of high-quality QD sensitizers is a prerequisite for high photovoltaic performance. Herein, a facile and effective ligand design strategy to improve both the loading amount and optoelectronic performance of QD sensitizers is developed by decorating the QD surface with dual ligands of mercaptopropionic acid (MPA) and inorganic ligands (ILs). Experimental results demonstrate that the coexistence of ILs with MPA can not only reduce solvation energy that facilitates QD loading but also serve as effective cross-linkers for the reduction of interdot repulsion and formation of dense QD layers. Furthermore, various ILs, represented by pseudohalide SCN–, exhibit a great passivation effect on QD surfaces and suppress the defect trap states. Due to these benefits, Zn–Cu–In–S–Se (ZCISSe) QDSCs based on dual SCN/MPA ligands deliver a certified efficiency of 16.10%, which is a new record efficiency for liquid-junction QD solar cells.
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