Study of open circuit voltage loss mechanism in perovskite solar cells

Abstract

Open circuit voltage (V oc) loss within perovskite solar cells (PSCs) is undesirable as it reduces the power conversion efficiency of these devices. This report proposes a useful method to study V oc loss mechanisms based on experimental samples. V oc in the radiative limit () of devices is estimated by combining the detailed balance theory and the van Roosbroeck–Shockley relation. Furthermore, V oc loss from bulk recombination can be quantified by introducing the bulk lifetime. Thus, the V oc loss from bulk recombination of MAPbI3 and FASnI3 was estimated as 0.094 V and 0.061 V, respectively. The analysis helps distinguish and quantify the V oc loss of PSCs.