CoFe2O4 nanocrystals for interface engineering to enhance performance of perovskite solar cells
| Autor: | Guodong Li, Ruoshui Li, Zhang Lan, Yinsheng Liao, Jihuai Wu, Weihai Sun, Yanfei Dou, Deng Wang |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment business.industry Open-circuit voltage 020209 energy 02 engineering and technology 021001 nanoscience & nanotechnology Hydrothermal circulation Metal Nanocrystal visual_art 0202 electrical engineering electronic engineering information engineering visual_art.visual_art_medium Optoelectronics General Materials Science Grain boundary 0210 nano-technology business Layer (electronics) Current density Perovskite (structure) |
| Zdroj: | Solar Energy. 220:400-405 |
| ISSN: | 0038-092X |
| Popis: | 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, two-phase 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%. |
| Databáze: | OpenAIRE |
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