Work

Trapping light, revealing properties: Laser trapping as a powerful tool for photoluminescence spectroscopy

Year: 2024

Type: article

Abstract: Laser trapping, a non-contact technique for manipulating microscopic objects, has gained prominence in scientific research. When coupled with fluorescence spectroscopy, it offers a powerful tool for exploring material properties. This study demonstrates the application of laser trapping in the crystallization of MAPbBr 3 perovskites and its simultaneous use for photoluminescence imaging. MAPbBr 3 perovskites are a class of materials with exceptional optical properties, making them attractive for various optoelectronic applications. However, conventional excitation methods using UV light can lead to phase segregation and mechanical distortion of these materials. Two-photon excitation, on the other hand, offers advantages such as deeper penetration and reduced scattering interference. In this research, we utilize a 1064 nm continuous wave laser for both trapping and excitation purposes. The MAPbBr 3 perovskite, with its absorption band ranging from 400 to 540 nm, exhibits two-photon excitation at 532 nm. By focusing the laser beam at the air-solution interface, we successfully crystallize MAPbBr 3 perovskites from an unsaturated precursor solution. Simultaneously, the same laser source is used for photoluminescence imaging, allowing for real-time analysis of the crystal's emission properties. This approach eliminates the need for additional excitation sources and simplifies the experimental setup. The combination of laser trapping and two-photon excitation opens up new possibilities for studying perovskite materials. It provides a gentle and non-invasive method for manipulating and characterizing hybrid perovskites materials, paving the way for advancements in various fields such as optoelectronics and energy harvesting.

Source: Chemical Physics Impact

DOI: 10.1016/j.chphi.2024.100764

Authors: Dr. Md. Jahidul Islam, Nashin Sayara, Tasnia Talukder, Mohammad Harun-Ur-Rashid

Institution: International University of Business Agriculture and Technology

Language: English

Topic: Perovskite Materials and Applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,280

Funders: Osaka City University, Ministry of Education, Culture, Sports, Science and Technology, Hokkaido University, Japan Society for the Promotion of Science