Issue 31, 2021

1T-Rich 2D-WS2 as an interfacial agent to escalate photo-induced charge transfer dynamics in dopant-free perovskite solar cells

Abstract

The scientific surge in halide perovskite solar cells (PSCs) is due to their solution processability and high power conversion efficiency; however, the deficiency in the photo-induced charge transfer dynamics at the perovskite-charge transport layer interfaces due to depleted energy alignment and surface traps impedes performance improvement. Interface engineering has become one of the rewarding approaches to control the charge accumulation and recombination at interfaces, which in turn promotes excellent charge extractability and device performance. Here, we introduce a few-atom thick 1T-rich 2D-WS2 as an interfacial layer placed on a perovskite to minimize the energy barrier and charge accumulation at the interface to intensify the extraction of detrapped charges and charge transfer dynamics. By combining the interfacial layer in a dopant-free hole transport layer, we achieved a stabilized efficiency of over 19% with a significantly enhanced open-circuit voltage and fill factor. Our work put forward the deep experimental understanding of 2D materials as an interfacial agent toward their stabilized performances.

Graphical abstract: 1T-Rich 2D-WS2 as an interfacial agent to escalate photo-induced charge transfer dynamics in dopant-free perovskite solar cells

Supplementary files

Article information

Article type
Paper
Submitted
19 May 2021
Accepted
25 Jun 2021
First published
28 Jun 2021

J. Mater. Chem. C, 2021,9, 9865-9873

1T-Rich 2D-WS2 as an interfacial agent to escalate photo-induced charge transfer dynamics in dopant-free perovskite solar cells

N. Harindu Hemasiri, S. Kazim and S. Ahmad, J. Mater. Chem. C, 2021, 9, 9865 DOI: 10.1039/D1TC02307A

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