[19a-E101-1~12] 12.5 Organic solar cells

[19a-E101-10] Efficiency improvement in perovskite solar cells by aging and passivation

〇YONGYOON CHO^1,2, Hyung Do Kim², Jianghui Zheng¹, Jueming Bing¹, Meng Zhang¹, Yong Li¹, Martin A. Green¹, Shujuan Huang^1,3, Hideo Ohkita², Anita W.Y. Ho-Baillie^1,3 (1.UNSW, 2.Kyoto university, 3.Macquarrie university)

Keywords:perovskite solar cells, Aging effect, Passivation

In many papers it has been reported early PCE increase by aging process whose origin is still under discussion. In this study, we aim to figure out the origin of PCE enhancement by aging process and passivation treatment. Dominant recombination process in device was analysed by temperature & light-intensity dependent open-circuit voltage (Voc) of devices.
Device performances change by aging and passivation process that aging process improved fill factor and Voc regardless of interface passivation. By analysis of light intensity and temperature dependence on Voc, it was found that recombination process has been changed by passivation treatment and aging process. Origin of recombination change will be discussed in the view of device component evolution.