Journal
SCIENTIFIC REPORTS
Volume 5, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/srep14083
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Funding
- General Research Fund from the Hong Kong Research Grant Council [612113]
- Hong Kong Innovation and Technology Fund from the Innovation and Technology Commission [ITS/117/13]
- Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP)
- Research Grants Council Earmarked Research Grants (RGC-ERG) [M_CityU 102/12]
- Fundamental Research Project of Shenzhen Science & Technology Foundation [JCYJ20130402164725025]
- International Collaboration Project of Shenzhen Science & Technology Foundation [GJHZ20130417170946221]
- TcSUH
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Organometallic trihalide perovskites are promising materials for photovoltaic applications, which have demonstrated a rapid rise in photovoltaic performance in a short period of time. We report a facile one-step method to fabricate planar heterojunction perovskite solar cells by chemical vapor deposition (CVD), with a solar power conversion efficiency of up to 11.1%. We performed a systematic optimization of CVD parameters such as temperature and growth time to obtain high quality films of CH3NH3PbI3 and CH3NH3PbI3-xClx perovskite. Scanning electron microscopy and time resolved photoluminescence data showed that the perovskite films have a large grain size of more than 1 micrometer, and carrier life-times of 10 ns and 120 ns for CH3NH3PbI3 and CH3NH3PbI3-xClx, respectively. This is the first demonstration of a highly efficient perovskite solar cell using one step CVD and there is likely room for significant improvement of device efficiency.
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