Publication Details:

Established in 2008

Journal or Publication Title:

Armenian Journal of Physics=Ֆիզիկայի հայկական հանդես

Date of publication:

2026

Volume:

19

Number:

4

ISSN:

1829-1171

Official URL:

Coverage:

135-141

Abstract:

This work investigates the radiation resilience of mixed-cation mixed-halide (FA0.65MA0.35)0.92Pb(I0.85Br0.14Cl0.01)3 perovskite thin films under 15.5 MeV proton irradiation, focusing on the protective role of a methylammonium chloride (MACl) processing additive. Three distinct sample conditions were systematically compared, an unirradiated pristine film without MACl, an irradiated control film without MACl and an irradiated optimized film with MACl․ Scanning electron microscopy (SEM) analysis revealed that introducing MACl drastically alters crystallization kinetics, expanding the average grain size from 150-200 nm to 500-600 nm, thereby reducing vulnerable grain boundary density. Following proton bombardment at a cumulative fluence of 5 x 1015 protons⋅cm-2, the control film exhibited severe morphological micro-cracks along grain junctions, surface decomposition, and a dramatic quenching of its photoluminescence (PL) intensity down to 20% of its initial value, alongside a suppressed optical absorbance edge. These changes signify the massive formation of deep-level defect centers via atomic displacement. Conversely, the irradiated MACl optimized film demonstrated superior radiation hardness, maintaining its compact morphological integrity without cracking, preserving its absorption profile, and retaining 70% of its initial PL intensity. This enhanced stability is attributed to the minimization of boundary-mediated defect propagation paths and effective trap passivation by localized chloride ions.

Format:

pdf

Identifier:

click here to follow the link ; oai:arar.sci.am:441289

Location of original object:

ՀՀ ԳԱԱ Հիմնարար գիտական գրադարան