Issue 19, 2024

Moisture-induced ionovoltaic electricity generation using lead free 2-dimensional Cs3SbBiBr9 perovskite

Abstract

In the field of solar energy applications, ion migration is a significant challenge. A promising solution to tackle this issue is through the Ionovoltaic Electricity Generator (IEG) effect observed in two-dimensional (2D) lead-free halide perovskite structures equipped with lateral electrodes. These devices with millimeter-spaced lateral electrodes generate electricity through moisture absorption. As moisture is absorbed, it creates an uneven distribution of ions, establishing a gradient that prompts ion migration. This migration generates a voltage difference across the electrodes, which in turn propels electrons through an external circuit, producing electrical power. Furthermore, humidity plays a crucial role in enhancing power generation by aiding in ion formation. In this study, we successfully synthesized mixed alloys of antimony and bismuth in the form of nanosheets of Cs3SbBiBr9 using a solution-based approach. The Cs3SbBiBr9 device, covering an area of 0.3 cm2 (1.5 cm × 0.2 cm), demonstrated an open-circuit voltage (Voc) of 0.22 V and a short-circuit current (Isc) of 35 μA at 85% relative humidity (RH).

Graphical abstract: Moisture-induced ionovoltaic electricity generation using lead free 2-dimensional Cs3SbBiBr9 perovskite

Supplementary files

Article information

Article type
Paper
Submitted
24 Jul 2024
Accepted
25 Aug 2024
First published
29 Aug 2024

Sustainable Energy Fuels, 2024,8, 4628-4637

Moisture-induced ionovoltaic electricity generation using lead free 2-dimensional Cs3SbBiBr9 perovskite

A. K. Pramod and S. K. Batabyal, Sustainable Energy Fuels, 2024, 8, 4628 DOI: 10.1039/D4SE00997E

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