Steady-state photoluminescence studies of TFA-CsPbBr3: Zn perovskite quantum dots

Perovskite quantum dots (QDs) have garnered significant interest for their superior optical properties. Despite their attractive photovoltaic properties and chemical processing ability, the high defects density within QDs can result in the annihilation of luminescence. In this study, cesium trifluoroacetic acid (CsTFA) was used as the cesium source, replacing conventional cesium carbonate (Cs2CO3) and introducing TFA ligands to improve the luminescence quality of QDs. As well as doping with Zn2+ to enhance both the stability and luminescence quality of the quantum dot solution. The doped QDs exhibit the highest photoluminescence (PL) intensity, which is further enhanced by the perovskite QDs with TFA as a ligand. Furthermore, the PL spectra of CsPbBr3 and TFA-CsPbBr3: Zn (10 %) QDs with the temperature changes have also been analyzed. The result reveals the relationship between excitons and phonons. Based on the result, Zn2+ doped and TFA ligand induced perovskite QDs have the potential to serve as an optimal material.