期刊
ACS APPLIED ENERGY MATERIALS
卷 4, 期 6, 页码 5747-5755出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.1c00575
关键词
all-inorganic perovskite solar cell; CsPbIBr2; carbon electrode; quinoline sulfate; surface passivation; long-term stability
资金
- National Natural Science Foundation of China [U1705256, 61804058]
- Natural Science Foundation of Fujian Province [2019J02012]
- Graphene Powder & Composite Research Center of Fujian Province [2017H2001]
- Cultivation Program for Postgraduate in Scientific Research Innovation Ability of Huaqiao University [18011081009]
This study proposes a passivation strategy to prepare CsPbIBr2 PSC with high efficiency, long-term stability, and low hysteresis. The effective passivation enhances the humidity resistance of CsPbIBr2 film and the carbon-based PSC without a hole transporter achieves a high PCE.
The mixed-halide CsPbIBr2 all-inorganic perovskite solar cells (PSCs) have attracted widespread attention in view of their excellent stability and suitable band gap. However, the inherent high traps in perovskite films lead to serious nonradiative recombination and limit their future development. In this study, a passivation strategy is proposed to prepare CsPbIBr2 PSC with high efficiency, excellent long-term stability, and low hysteresis, which uses the in situ formed PbSO4 protective layer and the passivation of undercoordinated Pb2+ defects by introducing quinoline sulfate (QS). Due to the effective passivation, the QS-passivated CsPbIBr2 film with a larger grain size exhibits a better humidity resistance compared with the control one. The champion power conversion efficiency (PCE) of the carbon-based PSC without a hole transporter reaches 10.41% with an open-circuit voltage (V-OC) of 1.298 V. Especially, it can retain over 98% of the primeval PCE after nearly 1000 h of aging in the ambient atmosphere. Therefore, our work may promote the application of all-inorganic PSC in commercial development.
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