Fig. 1From: Optical engineering of PbS colloidal quantum dot solar cells via Fabry–Perot resonance and distributed Bragg reflectorsSchematic of a the distributed Bragg reflector (DBR) assisted Fabry–Perot (FP) resonance integrated solar cell, and b charge transport illustration in thick PbS active layer without FP, thin PbS without FP, and thin PbS with DBR assisted FPBack to article page