期刊
NANO ENERGY
卷 64, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2019.103962
关键词
Operational stability; MPP tracking; Ions diffusion; Elevated temperature; Interfacial degradation
类别
资金
- National Natural Science Foundation of China [51773213]
- Natural Science Foundation of Zhejiang Province of China [LQ19E030008]
- Key Research Program of Frontier Sciences, CAS [QYZDB-SSW-JSC047]
- Zhejiang Province Science and Technology Plan [2018C01047]
- National Youth Top-notch Talent Support Program
Operational stability remains the foremost concern delaying the commercialization of perovskite solar cells (PSCs). Ions diffusion from iodine-rich perovskite layer to metal electrode is one main reason for the irreversible devices degradation. Here we introduce chemically crosslinked TMTA (trimethylolpropane triacrylate) at both bulk perovskite layer and perovskite/PCBM interface to suppress the ions diffusion toward electrode. The TMTA in perovskite layer suppresses ions migration along grain boundaries and TMTA at perovskite/PCBM interface blocks ions diffusion toward electrode, owing to its continuous network structure and chemically inert nature. Diffusion experiment, permeation experiment and resistive random-access memory (ARAM) investigation confirm the effectively blocked ions diffusion in PSCs with TMTA whether under heat, light or electric field conditions. The resulting PSCs exhibit 7-fold improvement in operational stability at elevated temperature of 60 degrees C, retaining similar to 80% of initial efficiency after maximum power point tracking for 1000 h under continuous illumination. The PSCs with TMTA also exhibit good thermal stability and retain over 90% of the initial efficiency after aging at 60 degrees C for 1000 h.
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