One-stop service for perovskite synthesis and characterization by laser trapping

Abstract

Lead halide hybrid perovskites represent a group of compounds exhibiting remarkable potential for applications in solar cells, optoelectronics, and LEDs. Understanding their photophysical properties through scientific techniques is crucial for optimizing their performance in these various fields. In this research our core technique is laser trapping, which utilizes a continuouswave (CW) laser at 800 nm with a power of 0.6 W to manipulate precursor solutions. This focused laser beam allows for trapping-induced crystallization, enabling the formation of high-quality perovskite crystals directly within the measurement setup. Steady-state photoluminescence (PL) measurements are then performed using two-photon excitation at 400 nm using the CW mode of trapping laser. Additionally, photoluminescence lifetime measurements are conducted using the same laser in pulsed mode with picosecond excitation. By analyzing the PL decay over 6 nanoseconds, researchers can gain insights into the excited state dynamics of the perovskite. This work demonstrates the effectiveness of a one-stop approach for perovskite characterization. Laser trapping facilitates controlled crystal growth, while combined steady state PL and PL lifetime measurements provide a comprehensive picture of the material's light-matter interaction. This approach paves the way for efficient and in-depth analysis of novel perovskite materials for next-generation technologies.