TY - GEN
T1 - UV Degradation of Formamidinium-Cesium Lead Halide Perovskite Solar Cells
AU - Dolia, Kshitiz
AU - Abudulimu, Abasi
AU - Fu, Sheng
AU - Brau, Tyler
AU - Jensen, Karissa
AU - Moffitt, Stephanie L.
AU - Ellingson, Randy J.
AU - Gu, Xiaohong
AU - Song, Zhaoning
AU - Yan, Yanfa
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Perovskite solar cells show great promise for cost-effective and efficient solar energy production, but their stability remains a challenge. Understanding the degradation mechanisms of perovskite solar cells is essential for their successful implementation and widespread use. Here, we study the degradation mechanism of formamidinium-cesium lead halide perovskite solar cells under ultraviolet (UV) radiation. We measure the UV-induced device performance degradation and characterize the changes in the structural and optoelectronic properties of perovskite films after UV radiation. Further analysis reveals that UV-induced halide photo-redox reactions create iodine vacancies at the buried interface of perovskite films, leading to phase segregation and crystal reconstruction to form photoinactive CsI-rich defects, increasing non-radiative recombination and reducing the efficiency of the UV-exposed cells. Understanding the degradation mechanism will aid in directing attention toward developing encapsulants and the design of more stable perovskites.
AB - Perovskite solar cells show great promise for cost-effective and efficient solar energy production, but their stability remains a challenge. Understanding the degradation mechanisms of perovskite solar cells is essential for their successful implementation and widespread use. Here, we study the degradation mechanism of formamidinium-cesium lead halide perovskite solar cells under ultraviolet (UV) radiation. We measure the UV-induced device performance degradation and characterize the changes in the structural and optoelectronic properties of perovskite films after UV radiation. Further analysis reveals that UV-induced halide photo-redox reactions create iodine vacancies at the buried interface of perovskite films, leading to phase segregation and crystal reconstruction to form photoinactive CsI-rich defects, increasing non-radiative recombination and reducing the efficiency of the UV-exposed cells. Understanding the degradation mechanism will aid in directing attention toward developing encapsulants and the design of more stable perovskites.
UR - https://www.scopus.com/pages/publications/85182752343
U2 - 10.1109/PVSC48320.2023.10360096
DO - 10.1109/PVSC48320.2023.10360096
M3 - 会议稿件
AN - SCOPUS:85182752343
T3 - Conference Record of the IEEE Photovoltaic Specialists Conference
BT - 2023 IEEE 50th Photovoltaic Specialists Conference, PVSC 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 50th IEEE Photovoltaic Specialists Conference, PVSC 2023
Y2 - 11 June 2023 through 16 June 2023
ER -