Synthesis and Characterization of Photoluminescent Cesium Lead Bromide Perovskite for Optoelectronic Applications
This title has been presented on Friday, December 15, 2023 at 09.05-09.15 GMT+7.
Abstract
This title has been presented on Friday, December 15, 2023 at 09.05-09.15 GMT+7.
As a renewable and unlimited power source, solar energy based on perovskite material has an important role in reducing greenhouse effect and climate change mitigation thus is vital in supporting future sustainable agromaritime. This study focuses on the synthesis and characterization of Cesium Lead Bromide (CsPbBr3), an alkali halide perovskite semiconductor. The primary objective is to fabricate CsPbBr3 material using a one-step solution method and to characterize its optical (luminescent)
properties and crystal structure. The synthesized material, a solid with a distinct green color, emits bright green light when exposed to UV radiation. Photoluminescence characterization was conducted at an excitation wavelength of 420 nm, yielding an emission peak at 512 nm (2.42 eV). Interestingly, this emission shifts to a lower energy value of 2.31 eV when the sample is exposed to air, accompanied by physical changes where the perovskite solid shifts from green to orange. Time-Resolved Photoluminescence Spectroscopy revealed that the luminescence lifetime decreases upon air exposure. Additionally, X-ray Diffraction (XRD) analysis indicated that the CsPbBr3 formed possesses a cubic crystal structure with an average crystal size of 34.7 nm after two months of air exposure. The synthesized CsPbBr3 perovskite demonstrates promising characteristics for optoelectronic devices such as LEDs, solar cells, and lasers, highlighting its potential in advancing optoelectronic technology.
