MgCl2 passivated ZnO electron transporting layer to improve PbS quantum dot solar cells

被引：19

作者：

Gao, Yijun ^{[1
]}

Patterson, Robert ^{[1
]}

Hu, Long ^{[1
]}

Yuan, Lin ^{[1
]}

Zhang, Zhilong ^{[1
]}

Hu, Yicong ^{[1
]}

Chen, Zihan ^{[1
]}

Teh, Zhi Li ^{[1
]}

Conibeer, Gavin ^{[1
]}

Huang, Shujuan ^{[1
]}

机构：

[1] Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Australian Ctr Adv Photovolta, Sydney, NSW 2052, Australia

来源：

NANOTECHNOLOGY | 2019年 / 30卷 / 08期

关键词：

ZnO nanoparticle; surface passivation; colloidal quantum dots; solar cells; ZINC-OXIDE; PERFORMANCE;

D O I：

10.1088/1361-6528/aae3de

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The unique tunable bandgaps and straightforward synthesis of colloidal quantum dots make them promising low-cost materials for photovoltaics. High-performance colloidal quantum dot solar cells rely on good-quality electron transporting layers (ETLs) to make carrier selective contacts. Despite extensive use of n-type oxides as ETLs, a detailed understanding of their surface and interface states as well as mechanisms to improve their optical properties are still under development. Here, we report a simple procedure to produce MgCl2 passivated ZnO nanoparticles ETLs that show improved device performance. The MgCl2 treated ZnO electron transporting layers boost the PbS colloidal quantum dot cell efficiency from 6.3% to 8.2%. The cell exhibits reduced defects leading to significant improvements of both FF and J(sc). This low-temperature MgCl2 treated ZnO electron transporting layer may be applied in solution processed tandem cells as a promising strategy to further increase cell efficiencies.

引用

页数：7