Effect of Pulsed Laser Irradiation on Perovskite/TiO2 Nanoparticles
Year: 2025
Type: article
Abstract: Perovskite layers are key nanoscale absorbers in a wide range of optoelectronic devices, driving intense research into their deposition control, crystallization kinetics, and interfacial nanoengineering. In this work, we investigate the effects of nanosecond-pulsed Nd:YVO4 laser irradiation (355 nm) on the structural and optical properties of perovskite layers integrated with TiO2 nanoparticles. Nanoscale modifications induced by laser processing are systematically analyzed through optical transmission, photoluminescence (PL), surface morphology, and elemental composition measurements. The results reveal laser fluence as a decisive parameter: Low fluence deteriorates optoelectronic performance by forming a defective surface dead layer via increased nanoscale roughness, whereas higher fluence enhances optical transmittance through controlled nanoscale ablation and film thinning. Moreover, the incorporation of a mesoporous TiO2 nanoparticle scaffold plays a critical role in maintaining bandgap stability during laser exposure, underscoring its protective function against localized thermal decomposition. These findings demonstrate that laser-matter interactions at the nanoscale can be precisely tuned to engineer perovskite layers for targeted optoelectronic device applications.
Source: OICC Press Journals
Authors: Ghazyani, Nahid, Kamrani Pouya, Vahid
Institutions: Kharazmi University, Amirkabir University of Technology
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7127578400
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