Urbach Tail Suppression in Bi-Doped MAPbBr 3 Driven by Water-Assisted Morphological Engineering
Year: 2026
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide Bismuth (Bi 3+ ) doping lead halide perovskites modulates optoelectronic properties but often induces structural disorder and trap formation. Here, Bi-doped MAPbBr 3 synthesized via a water-assisted dissolution-recrystallization route is systematically investigated. As-grown microcubes exhibit lattice contraction, pronounced band tailing, and quenched photoluminescence due to nonradiative recombination. Controlled water-mediated recrystallization drives morphology transformation into wire-like microstructures, promoting lattice relaxation, dopant redistribution, and defect passivation. Consequently, the Urbach tail is suppressed and radiative recombination is restored. Time-resolved photocurrent reveals faster and reversible photoresponses, highlighting water-induced morphological confinement as an effective strategy to reduce energetic disorder in doped perovskites.
Source: ACS Applied Electronic Materials
Institution: Universidade Federal do ABC
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
OpenAlex ID: W7140134914