Issue 9, 2024

Effect of PCBM nanoparticles in lead-based layered (PEA)2PbI4 perovskite thin films

Abstract

Two-dimensional (2D) layered halide perovskites are considered to be one of the future potential semiconductor materials due to their higher moisture stability than three-dimensional (3D) perovskites. However, improving their optical and electrical properties is still necessary for critical applications. The technique of additive engineering can be utilized to tune and enhance the optoelectrical properties of the 2D perovskites. This work studies the impact of mixing a certain amount of a fullerene derivative ‘[6,6]-phenyl C61-butyric acid methyl ester’ (PCBM) into 2D (PEA)2PbI4 perovskite thin films (PEA = phenyl ethyl ammonium). The studies show that PCBM does not affect the structure and bandgap of the (PEA)2PbI4 perovskite. On the other hand, PCBM improves photoluminescence emission intensity and promotes charge separation at the perovskite/PCBM interface. Further studies convey that, even though PCBM can heal certain defect states in the (PEA)2PbI4 perovskite material, the electrons generated under intense illumination at the perovskite/PCBM interface are trapped by this fullerene derivative. Hence, PCBM plays a dual role when mixed with the (PEA)2PbI4 perovskite, as (1) a defect healing agent and (2) an electron acceptor. However, over continuous illumination on the (PEA)2PbI4 perovskite thin films, the photoexcited electrons are trapped by PCBM. As a result, the photocurrent response and the photocatalytic reaction rate get reduced in PCBM mixed (PEA)2PbI4 perovskite thin films.

Graphical abstract: Effect of PCBM nanoparticles in lead-based layered (PEA)2PbI4 perovskite thin films

Supplementary files

Article information

Article type
Paper
Submitted
28 mei 2024
Accepted
11 aug 2024
First published
12 aug 2024
This article is Open Access
Creative Commons BY-NC license

Energy Adv., 2024,3, 2328-2334

Effect of PCBM nanoparticles in lead-based layered (PEA)2PbI4 perovskite thin films

D. Aloysius, M. Khan, A. Mondal and S. Gupta, Energy Adv., 2024, 3, 2328 DOI: 10.1039/D4YA00338A

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