Synthesis of CsPbBr3 Quantum Dots for Photodetectors

Abstract

Metal halide perovskites (MHP) represent a flourishing area of research, which is driven by both their potential applications in photovoltaics and optoelectronics and by the fundamental science behind their unique optoelectronic properties. we synthesized CsPbBr3 quantum dots (QDs) via the LARP method at RT and mixed them with conjugate polymer to fabricate nanocomposite photodetectors. We found that the size and optical properties of CsPbBr3 QDs are affected by varying the amount of precursor injected into antisolvent, ligands in precursor or antisolvent, and centrifugation speed. Besides, we have fabricated the conventional sandwich structure photodiode by using CsPbBr3 QDs blended with conjugated polymer Poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-co-(bithiophene)] F8T2 as the active layer. The dark current might depend on the weight ratio of F8T2:CsPbBr3 and the structure of device, which we will focus on in the future.