期刊
ADVANCED ENERGY MATERIALS
卷 11, 期 19, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202002733
关键词
Dion– Jacobson perovskite; film formation; in situ diagnostics; solar cells; solution‐ processing
类别
资金
- Strategic Priority Research Program of Chinese Academy of Science [XDA17040506]
- National Nature Science Foundation of China [61974085, 91733301]
- Cooperation Foundation of Dalian National Laboratory For Clean Energy of the Chinese Academy of Sciences [DNL180311]
- 111 Project [B1404]
- Innovation Fund Project of Dalian Institute of Chemical Physics [DICP I202032]
- Project of Knowledge Innovation Engineering [Y261261606]
In this study, a detailed investigation into the effects of different solution-casting processes on film formation for DJ perovskite semiconductors was conducted. It was found that faster solvent removal through hot-casting or antisolvent dripping resulted in a more uniform thickness distribution of quantum wells, leading to enhanced carrier transport and increased power conversion efficiencies for photovoltaic devices. High efficiency of 15.81% was achieved for hot-casting devices, marking it as the highest efficiency for aromatic spacer-based DJ perovskite solar cells.
Dion-Jacobson (DJ) 2D hybrid perovskite semiconductors offer improved environmental stability and higher structural diversity in comparison with their 3D analogous. However, lacking of controlled perovskite crystallization makes it a challenge to achieve high charge transport for photovoltaic devices. Here, a detailed understanding of effects on film formation during different solution-casting processes for the DJ perovskite (PDMA)(MA)(n)-1PbnI3n+1 ( = 4, PDMA refers to 1,4-phenylenedimethanammonium) in the final film structure and photovoltaic outcomes is presented. Faster removal of solvent from solution via hot-casting or antisolvent dripping results in a more uniform thickness distribution of quantum wells. This eventually enhances carrier transport greatly along perpendicular direction and increases power conversion efficiencies. A high efficiency of 15.81% is achieved for the hot-casting devices, which is also the highest for aromatic spacer-based DJ perovskite solar cells. This work helps to better understand the control of film formation during solution-casting for high performance solar cells.
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