Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 10, Issue 10, Pages 2349-2356Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.9b00750
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Funding
- National Basic Research Program of China
- Fundamental Studies of Perovskite Solar Cells [2015CB932200]
- Natural Science Foundation of China [51602149, 61705102, 91733302]
- Natural Science Foundation of Jiangsu Province, China [BK20150064, BK20161011, BK20161010]
- Young 1000 Talents Global Recruitment Program of China
- Jiangsu Specially Appointed Professor program
- Six talent peaks Project in Jiangsu Province, China
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Reduced-dimensional (RD) perovskite solar cells (PSCs) are emerging as highly attractive alternatives to three-dimensional (3D) PSCs due to their dramatically improved environmental stability and photostability. Diamine-based RD perovskites with a single organic amine interlayer possess orderly inorganic sheets and a smaller insulation area, indicating great potential in combining high efficiency and long-term stability. Here, we report an efficient and stable RD PSC based on 1,4-butanediamine (BDA). We found that the BDA-based RD perovskite exhibits improved crystallinity, reduced trap-state densities, and enhanced charge mobility compared to those of butylamine (BA)-based RD (BA-RD) perovskite. A high power conversion efficiency of 17.91% was achieved with negligible hysteresis. Moreover, the device showed improved stability compared to those of BA-RD and 3D films and devices. The findings may inspire new developments in introducing organic diamine for efficient and stable RD PSCs.
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