Issue 8, 2023

Inhibiting Li+ migration by thenoyltrifluoroacetone toward efficient and stable perovskite solar cells

Abstract

Lithium bis(trifluoromethanesulfonyl)imide is commonly employed as a dopant to improve the hole mobility of hole transport layers. However, undesired Li+ migration impedes the development of highly efficient and stable perovskite solar cells because the voids left by Li+ migration will accelerate the penetration of oxygen and moisture. Here, thenoyltrifluoroacetone (TTA) modifies the perovskite/spiro-OMeTAD interface. TTA can passivate the undercoordinated Pb2+ defects via the coordination between carbonyl/thiophenic sulfur and Pb2+. TTA can also inhibit the annoying Li+ migration by the coordination interaction between carbonyl and Li+. Besides, TTA can promote hole extraction by adjusting the energy level matching at the perovskite/hole transport layer interface. A TTA-modified device yields a power conversion efficiency of over 22% and has improved humidity and thermal stability. This finding paves a novel way to suppress undesired Li+ migration for highly efficient and stable PSCs.

Graphical abstract: Inhibiting Li+ migration by thenoyltrifluoroacetone toward efficient and stable perovskite solar cells

Supplementary files

Article information

Article type
Research Article
Submitted
20 နို 2022
Accepted
18 မတ် 2023
First published
20 မတ် 2023

Inorg. Chem. Front., 2023,10, 2294-2303

Inhibiting Li+ migration by thenoyltrifluoroacetone toward efficient and stable perovskite solar cells

Y. Ma, G. Han, M. Yang, M. Guo, Y. Xiao, Y. Guo and W. Hou, Inorg. Chem. Front., 2023, 10, 2294 DOI: 10.1039/D2QI02460H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements