AUTHOR=Zhong Hong , Zhou Renlai , Wu Xiaoqing , Lin Xiaoyun , Wang Ya , Li Qian , Zhou Hang 

TITLE=Investigation of the S-Shaped Current–Voltage Curve in High Open-Circuit Voltage Ruddlesden–Popper Perovskite Solar Cells

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 9 - 2021

YEAR=2021

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2021.689657

DOI=10.3389/fenrg.2021.689657

ISSN=2296-598X

ABSTRACT=We report our investigation on the S-shaped current-voltage characteristics in a hot-casting-processed (BA)2(MA)3Pb4I13 Ruddlesden-Popper (RP) perovskite solar cell. The two-dimensional perovskite solar cells are fabricated with NiOx as hole transport layer(HTL), which lead to significantly high open circuit voltage (Voc). The champion device has shown an Voc of 1.21V, and short current density (Jsc) of 17.14 mA/cm2, leading to an overall power conversion efficiency (PCE) of 13.7％. Although the PCE is much higher than the control device fabricated on PEDOT:PSS, a significant S-shaped current-voltage behavior is found on these NiOx based devices.