期刊
SOLAR ENERGY
卷 220, 期 -, 页码 400-405出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2021.03.073
关键词
Perovskite solar cell; Surface passivation
资金
- National Natural Science Foundation of China [51972123, 61474047, U1705256]
- Natural Science Foundation of Fujian Province [2019J02012]
- Fujian Provincial Youth Top-notch Talents Supporting Program
- Graphene Powder AMP
- Composite Research Center of Fujian Province [2017H2001]
- Cultivation Program for Postgraduate in Scientific Research Innovation Ability of Huaqiao University [18013081056]
In this study, CoFe2O4 nanocrystals were synthesized using a two-phase hydrothermal method and were used to modify perovskite solar cells, resulting in devices with improved performance.
Interface engineering has been widely applied to perovskite solar cells (PSCs) for solving the problems caused by high density of parasitic traps and the defects that exist at grain boundaries and surfaces. Various inorganic metal oxides play roles in PSCs, helping to achieve higher efficiency and better long-term stability. In this work, twophase hydrothermal method is used for CoFe2O4 nanocrystals (NCs) synthesis and the obtained NCs were used to modify the surface between perovskite (PVK) and hole transport layer (HTL). Results show that CoFe2O4 modified devices have enhanced hole extraction, reduced trap density, and hydrophobic ligand connected to CoFe2O4 NCs provide better moisture resistance to PVK layer. Devices with CoFe2O4 layer exhibit a best PCE of 19.65% with improved open circuit voltage (VOC), fill factor (FF) and reproducibility. At steady-state, CoFe2O4 modified devices show a current density of 20.16 mA/cm2 and PCE of 18.97%.
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