Tuning of bandgap for warm white light emissions in indium-doped cesium metal halide perovskites by solvothermal method
Year: 2024
Type: article
Abstract: Cesium-based perovskites, particularly Cs 3 Bi 2 Br 9 , doped with indium, have emerged as promising materials for energy-efficient lighting, notably in white light-emitting diodes (WLEDs). This study aimed to address environmental concerns associated with lighting technology by employing solvothermal synthesis to fabricate these materials. Comprehensive characterization techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM), and photoluminescence spectroscopy (PL), were applied to assess their properties. XRD analysis confirmed the formation of Cs 3 Bi 2 Br 9 with a trigonal crystal structure and indium doping induced significant changes in the material’s color and crystal lattice. TEM imaging, even after six months, revealed the presence of stable nanocrystals, indicating the material’s durability in practical applications. UV–Vis absorption and photoluminescence spectroscopy showed variable bandgaps and efficient photon emission. Notably, as the indium doping concentration increased, the emitted light shifted from blue to bluish-white, making these materials highly suitable for the synthesis of WLEDs. This research offers a promising prospect to address environmental issues associated with lighting technology while advancing energy-efficient illumination solutions.
Source: Results in Optics
Authors: Sasi Bhushan Bhimavarapu, Vandana Somibabu, Pallepamu Tirupathi Rao, Deepti Bhargava, Satya Kamal Chirauri, R.K. Ramachandra
Institution: Adikavi Nannaya University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,230
OpenAlex ID: W4403351186