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Iodomethane-Mediate...
Iodomethane-Mediated Organometal Halide Perovskite with Record Photoluminescence Lifetime
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- Xu, Weidong (author)
- Soochow University, Peoples R China
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- McLeod, John A. (author)
- Soochow University, Peoples R China
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- Yang, Yingguo (author)
- Chinese Academic Science, Peoples R China
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- Wang, Yimeng (author)
- Soochow University, Peoples R China; Beijing University of Technology, Peoples R China; Beijing University of Technology, Peoples R China
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- Wu, Zhongwei (author)
- Soochow University, Peoples R China
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- Bai, Sai (author)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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- Yuan, Zhongcheng (author)
- Linköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska fakulteten
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- Song, Tao (author)
- Soochow University, Peoples R China
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- Wang, Yusheng (author)
- Soochow University, Peoples R China; Beijing University of Technology, Peoples R China; Beijing University of Technology, Peoples R China
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- Si, Junjie (author)
- Zhejiang University, Peoples R China
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- Wang, Rongbin (author)
- Soochow University, Peoples R China
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- Gao, Xingyu (author)
- Chinese Academic Science, Peoples R China
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- Zhang, Xinping (author)
- Beijing University of Technology, Peoples R China; Beijing University of Technology, Peoples R China
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- Liu, Lijia (author)
- Soochow University, Peoples R China
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- Sun, Baoquan (author)
- Soochow University, Peoples R China
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(creator_code:org_t)
- 2016-08-25
- 2016
- English.
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In: ACS Applied Materials and Interfaces. - : AMER CHEMICAL SOC. - 1944-8244 .- 1944-8252. ; 8:35, s. 23181-23189
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Organometallic lead halide perovskites are excellent light harvesters for high-efficiency photovoltaic devices. However, as the key component in these devices, a perovskite thin film with good morphology and minimal trap states is still difficult to obtain. Herein we show that by incorporating a low boiling point alkyl halide such as iodomethane (CH3I) into the precursor solution, a perovskite (CH3NH3PbI3-xClx) film with improved grain size and orientation can be easily achieved. More importantly, these films exhibit a significantly reduced amount of trap states. Record photoluminescence lifetimes of more than 4 mu s are achieved; these lifetimes are significantly longer than that of pristine CH3NH3PbI3-xClx films. Planar heterojunction solar cells incorporating these CH3I-mediated perovskites have demonstrated a dramatically increased power conversion efficiency compared to the ones using pristine CH3NH3PbI3-xClx. Photoluminescence, transient absorption, and microwave detected photoconductivity measurements all provide consistent evidence that CH3I addition increases the number of excitons generated and their diffusion length, both of which assist efficient carrier transport in the photovoltaic device. The simple incorporation of alkyl halide to enhance perovskite surface passivation introduces an important direction for future progress on high efficiency perovskite optoelectronic devices.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- iodomethane; perovskite solar cell; photoluminescence lifetime; surface passivation; trap state; transient absorption; microwave detected photoconductivity
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Xu, Weidong
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McLeod, John A.
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Yang, Yingguo
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Wang, Yimeng
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Wu, Zhongwei
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Bai, Sai
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Yuan, Zhongcheng
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Song, Tao
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Wang, Yusheng
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Si, Junjie
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Wang, Rongbin
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Gao, Xingyu
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Zhang, Xinping
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Liu, Lijia
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Sun, Baoquan
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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ACS Applied Mate ...
- By the university
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Linköping University