Efficient two-terminal all-perovskite tandem solar cells enabled by high-quality low-bandgap absorber layers

Multi-junction all-perovskite tandem solar cells are a promising choice for next-generation solar cells with high efficiency and low fabrication cost. However, the lack of high-quality low-bandgap perovskite absorber layers seriously hampers the development of efficient and stable two-terminal monol...

Full description

Saved in:
Bibliographic Details
Published in:Nature energy 2018-12, Vol.3 (12), p.1093-1100
Main Authors: Zhao, Dewei, Chen, Cong, Wang, Changlei, Junda, Maxwell M., Song, Zhaoning, Grice, Corey R., Yu, Yue, Li, Chongwen, Subedi, Biwas, Podraza, Nikolas J., Zhao, Xingzhong, Fang, Guojia, Xiong, Ren-Gen, Zhu, Kai, Yan, Yanfa
Format: Article
Language:English
Subjects:
Absorbers
Chlorine
Efficiency
Energy conversion efficiency
Energy gap
Fabrication
Perovskites
Photovoltaic cells
Production costs
Solar cells
Tin
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Multi-junction all-perovskite tandem solar cells are a promising choice for next-generation solar cells with high efficiency and low fabrication cost. However, the lack of high-quality low-bandgap perovskite absorber layers seriously hampers the development of efficient and stable two-terminal monolithic all-perovskite tandem solar cells. Here, we report a bulk-passivation strategy via incorporation of chlorine, to enlarge grains and reduce electronic disorder in mixed tin–lead low-bandgap (~1.25 eV) perovskite absorber layers. This enables the fabrication of efficient low-bandgap perovskite solar cells using thick absorber layers (~750 nm), which is a requisite for efficient tandem solar cells. Such improvement enables the fabrication of two-terminal all-perovskite tandem solar cells with a champion power conversion efficiency of 21% and steady-state efficiency of 20.7%. The efficiency is retained to 85% of its initial performance after 80 h of operation under continuous illumination.
ISSN:2058-7546
2058-7546
DOI:10.1038/s41560-018-0278-x