Impact of loss mechanisms on performances of perovskite solar cells

Abstract

With the progress in device research, the power conversion efficiency (PCE) of perovskite solar cells is continuously improving and is approaching its theoretical limit. Nonetheless, it is still below the efficiency limit predicted by Shockley-Queisser owing to the presence of loss mechanisms. In this paper, we comprehensively analyze the loss factors limiting performance of devices utilizing an equivalent circuit model and identify the dominant loss mechanisms. The results demonstrate that Shockley-Read-Hall recombination and series resistance is the most important two of factors limiting the performance of perovskite solar cell. Shunt resistance and surface recombination plays slight roles in PCE when they are greater than 104Ω∙cm2 and less than 104cm/s, respectively. Auger recombination has almost no impact on the device performance.