Amplified spontaneous emission dependence on temperature-induced crystalline phase transition in a solution processed MAPbBr 3 thin film

Key Points

• The aim is to investigate how temperature affects amplified spontaneous emission and photoluminescence in MAPbBr3 thin films during phase transitions.
• Analyzed the temperature dependence of amplified spontaneous emission (ASE) and photoluminescence (PL)
• Conducted measurements in the temperature range of 20–300 K during cooling
• Observed phase transitions: orthorhombic to tetragonal and tetragonal to cubic
• ASE and PL show notable changes with temperature variations
• Thermally activated non-radiative processes play a significant role
• Phase transitions impact the effectiveness of the ASE in the thin film

Abstract