期刊
NANO ENERGY
卷 103, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2022.107849
关键词
Perovskite solar cell; Ultraviolet stability; Self -assembly monolayer; Operational stability
类别
资金
- Natural Science Foundation of China [62074115]
- Special Fund of Hubei Luojia Laboratory [220100023]
- National University of Singapore
- National Research Foundation Singapore
- Singapore Economic Development Board
- Energy Market Authority of Singapore
The study focuses on the UV-induced degradation of inverted perovskite solar cells and proposes a method to suppress it effectively by modifying the heterojunction with a self-assembled monolayer. The findings provide insights into the long-term stability of perovskite PVs and offer a potential solution to mitigate UV-ID issues.
Long-term stability remains a challenge for commercializing metal halide perovskites in photovoltaic (PV) ap-plications. Ultraviolet-induced degradation (UV-ID) has been considered as one of the key stability issues for crystalline silicon PVs. However, limited studies have been performed on the long-term UV-ID of perovskite PVs, and none has been found related to operational stability under UV stressing. Here, we focus on UV-ID of inverted perovskite solar cells that comprise nickel oxide (NiO) as the hole transporting layer. Under continuous UV irradiation, we observe vacancies/voids generated in the vicinity of NiO/perovskite heterojunction. Time -resolved femtosecond transient absorption and double-ion injection current measurements indicate UV irradi-ation would induce interface shallow traps and severe ion migration. These UV-induced degradations can be greatly suppressed by modifying the heterojunction with a self-assembled monolayer [2-(9 H-Carbazol-9-yl) ethyl] phosphonic acid (2PACz). Unencapsulated NiO/2PACz devices, operated at maximum power point (MPP), retain over 90% of their initial efficiency after exposing to a total UV dose of 35 kWh/m2. The best-performing device reaches a stabilized efficiency of 22.2%, and retains 82% of its original efficiency after 2000 h of MPP tracking under one sun illumination (100 mW/cm2) at 45 celcius in ambient air when encapsulated.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据