Loading…

Zn 2+ ion doping for structural modulation of lead-free Sn-based perovskite solar cells

Sn-based perovskites have intrinsic defects, such as Sn vacancies, oxidised components (Sn 4+ ), and local lattice strain in the perovskite crystalline structure. In this study, Zn metal powder (Zn 0 ) was introduced to reduce Sn oxidation in the solution step based on the redox potential difference...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2023-05, Vol.11 (20), p.10605-10611
Main Authors: Jang, Hyungsu, Lim, Hyeong Yong, Park, Chan Beom, Seo, Jongdeuk, Son, Jung Geon, Song, Taehee, Lee, Jaehwi, Shin, Yun Seop, Roe, Jina, Kwak, Sang Kyu, Kim, Dong Suk, Kim, Jin Young
Format: Article
Language:English
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:Sn-based perovskites have intrinsic defects, such as Sn vacancies, oxidised components (Sn 4+ ), and local lattice strain in the perovskite crystalline structure. In this study, Zn metal powder (Zn 0 ) was introduced to reduce Sn oxidation in the solution step based on the redox potential difference. Additionally, Zn 2+ was introduced in the perovskite precursor, which decreased the intrinsic defects and lattice strain of the perovskite films. The diffusion length, particularly that of the hole, increased with a reduction in the lattice strain, and Zn doping led to interfacial energy-level alignment of the perovskite and hole-transporting layers. The reduced lattice strain decreased the defect density and charge carrier recombination of perovskite devices. The power conversion efficiency of the Zn-doped Sn-based perovskite solar cell was improved to 11.39% compared to the 8.56% of the reference device.
ISSN:2050-7488
2050-7496
DOI:10.1039/D2TA09793A