Issue 5, 2024

Photo-accelerated oxidation of spiro-OMeTAD for efficient carbon-based perovskite solar cells

Abstract

Metal halide perovskite thin film solar cell (PSC) technology demonstrates promising power conversion efficiency and paves the way to commercialization. So far, the best device performance originates from the n-i-p structure with FTO/SnO2/perovskite/Spiro-OMeTAD/Au device architecture. Traditionally, to achieve high efficiency, several hours of oxidization of a Li-doped Spiro-OMeTAD hole transport layer (HTL) is necessary, which hinders the application of Spiro-OMeTAD for rapid large-scale manufacturing. In particular, the oxidization process significantly relies on ambient conditions, including oxygen and moisture levels. In this work, we report a fast technique to accomplish rapid oxidation in several mins of Spiro-OMeTAD HTL in perovskite solar cells by illuminating in visible light with one Sunlight intensity (100 mW cm−2). Compared to the traditional approach, our photo-accelerated oxidization of Spiro-OMeTAD approach can deliver a high-power conversion efficiency. We employ this photo-accelerated oxidization for the planar carbon-based perovskite solar cell and achieve a champion device efficiency of 17.47%. This strategy overcomes the barriers for a simple and rapid means toward mass manufacturing and industrial applications by utilizing Spiro-OMeTAD as the HTL for the perovskite solar module.

Graphical abstract: Photo-accelerated oxidation of spiro-OMeTAD for efficient carbon-based perovskite solar cells

Article information

Article type
Paper
Submitted
17 Jan 2024
Accepted
14 Apr 2024
First published
17 Apr 2024
This article is Open Access
Creative Commons BY-NC license

Energy Adv., 2024,3, 1054-1061

Photo-accelerated oxidation of spiro-OMeTAD for efficient carbon-based perovskite solar cells

S. N. Vijayaraghavan, K. Khawaja, J. Wall, W. Xiang and F. Yan, Energy Adv., 2024, 3, 1054 DOI: 10.1039/D4YA00029C

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