Issue 6, 2023

Improved photovoltaic performance of Pb-free AgBi2I7 based photovoltaics

Abstract

Hybrid perovskites based on bismuth are good candidates for developing lead-free and air-stable photovoltaics, but they have historically been constrained by poor surface morphologies and large band-gap energies. Monovalent silver cations are incorporated into iodobismuthates as part of a novel materials processing method to fabricate improved bismuth-based thin-film photovoltaic absorbers. However, a number of fundamental characteristics prevented them from achieving better efficiency. We examine bismuth iodide perovskite made of silver with improvements in surface morphology and a narrow band gap, and we achieve high power conversion efficiency. AgBi2I7 perovskite was used in the fabrication of PSCs as a material for light absorption, and its optoelectronic proficiencies were also studied. We reduced the band gap to 1.89 eV and achieved a maximum power conversion efficiency of 0.96% using the solvent engineering approach. Additionally, simulation studies verified an efficiency of 13.26% by using AgBi2I7 as a light absorber perovskite material.

Graphical abstract: Improved photovoltaic performance of Pb-free AgBi2I7 based photovoltaics

Supplementary files

Article information

Article type
Communication
Submitted
13 Janv. 2023
Accepted
09 Febr. 2023
First published
16 Febr. 2023
This article is Open Access
Creative Commons BY license

Nanoscale Adv., 2023,5, 1624-1630

Improved photovoltaic performance of Pb-free AgBi2I7 based photovoltaics

P. Kumar, K. Ahmad and S. M. Mobin, Nanoscale Adv., 2023, 5, 1624 DOI: 10.1039/D3NA00029J

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