Issue 8, 2022

Development of formamidinium lead iodide-based perovskite solar cells: efficiency and stability

Abstract

Perovskite materials have been particularly eye-catching by virtue of their excellent properties such as high light absorption coefficient, long carrier lifetime, low exciton binding energy and ambipolar transmission (perovskites have the characteristics of transporting both electrons and holes). Limited by the wider band gap (1.55 eV), worse thermal stability and more defect states, the first widely used methylammonium lead iodide has been gradually replaced by formamidinium lead iodide (FAPbI3) with a narrower band gap of 1.48 eV and better thermal stability. However, FAPbI3 is stabilized as the yellow non-perovskite active phase at low temperatures, and the required black phase (α-FAPbI3) can only be obtained at high temperatures. In this perspective, we summarize the current efforts to stabilize α-FAPbI3, and propose that pure α-FAPbI3 is an ideal material for single-junction cells, and a triple-layer mesoporous architecture could help to stabilize pure α-FAPbI3. Furthermore, reducing the band gap and using tandem solar cells may ulteriorly approach the Shockley–Queisser limit efficiency. We also make a prospect that the enhancement of industrial applications as well as the lifetime of devices may help achieve commercialization of PSCs in the future.

Graphical abstract: Development of formamidinium lead iodide-based perovskite solar cells: efficiency and stability

Article information

Article type
Perspective
Submitted
30 aug 2021
Accepted
13 dec 2021
First published
28 dec 2021
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2022,13, 2167-2183

Development of formamidinium lead iodide-based perovskite solar cells: efficiency and stability

Z. Zheng, S. Wang, Y. Hu, Y. Rong, A. Mei and H. Han, Chem. Sci., 2022, 13, 2167 DOI: 10.1039/D1SC04769H

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