FIG 1 (IMAGE) Compuscript Ltd Caption Fig. 1| (a) MAPbI3/MoS2 PDs with their relative band alignment and charge transfer mechanisms using 1T and 2H phases of MoS2. (b) Schematic of planar (top) and vertical (bottom) structures of MAPbI3/MoS2 PDs and the drain bias and illumination effect on carrier transportation and separation. (c) schematic of MAPbI3/BP/MoS2 PD, and charge transfer mechanism showing both type-I and type-II band alignment at perovskite/BP and BP/MoS2 interfaces, respectively. (d) The energy-band diagram under flat-band conditions of planar inverted perovskite solar cells with different materials as the hole transport layer, including MoS2. Credit OEA Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.