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Chloride in lead chloride-derived organo-metal halides for perovskite-absorber solar cells

Unger, Eva L. LU ; Bowring, Andrea R. ; Tassone, Christopher J. ; Pool, Vanessa L. ; Gold-Parker, Aryeh ; Cheacharoen, Rongrong ; Stone, Kevin H. ; Hoke, Eric T. ; Toney, Michael F. and McGehee, Michael D. (2014) In Chemistry of Materials 26(24). p.7158-7165
Abstract

Organo-metal halide perovskites are an intriguing class of materials that have recently been explored for their potential in solar energy conversion. Within a very short period of intensive research, highly efficient solar cell devices have been demonstrated. One of the heavily debated questions in this new field of research concerns the role of chlorine in solution-processed samples utilizing lead chloride and 3 equiv of methylammonium iodide to prepare the perovskite samples. We utilized a combination of X-ray photoelectron spectroscopy, X-ray fluorescence, and X-ray diffraction to probe the amount of chlorine in samples before and during annealing. As-deposited samples, before annealing, consist of a crystalline precursor phase... (More)

Organo-metal halide perovskites are an intriguing class of materials that have recently been explored for their potential in solar energy conversion. Within a very short period of intensive research, highly efficient solar cell devices have been demonstrated. One of the heavily debated questions in this new field of research concerns the role of chlorine in solution-processed samples utilizing lead chloride and 3 equiv of methylammonium iodide to prepare the perovskite samples. We utilized a combination of X-ray photoelectron spectroscopy, X-ray fluorescence, and X-ray diffraction to probe the amount of chlorine in samples before and during annealing. As-deposited samples, before annealing, consist of a crystalline precursor phase containing excess methylammonium and halide. We used in situ techniques to study the crystallization of MAPbI3 from this crystalline precursor phase. Excess methylammonium and chloride evaporate during annealing, forming highly crystalline MAPbI3. However, even after prolonged annealing times, chlorine can be detected in the films in X-ray fluorescence measurements.

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author
publishing date
type
Contribution to journal
publication status
published
in
Chemistry of Materials
volume
26
issue
24
pages
8 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:84919754049
ISSN
0897-4756
DOI
10.1021/cm503828b
language
English
LU publication?
no
id
d512b71f-9bd1-47c6-8f5b-85c442239961
date added to LUP
2020-01-19 15:00:02
date last changed
2020-05-31 06:52:45
@article{d512b71f-9bd1-47c6-8f5b-85c442239961,
  abstract     = {<p>Organo-metal halide perovskites are an intriguing class of materials that have recently been explored for their potential in solar energy conversion. Within a very short period of intensive research, highly efficient solar cell devices have been demonstrated. One of the heavily debated questions in this new field of research concerns the role of chlorine in solution-processed samples utilizing lead chloride and 3 equiv of methylammonium iodide to prepare the perovskite samples. We utilized a combination of X-ray photoelectron spectroscopy, X-ray fluorescence, and X-ray diffraction to probe the amount of chlorine in samples before and during annealing. As-deposited samples, before annealing, consist of a crystalline precursor phase containing excess methylammonium and halide. We used in situ techniques to study the crystallization of MAPbI<sub>3</sub> from this crystalline precursor phase. Excess methylammonium and chloride evaporate during annealing, forming highly crystalline MAPbI<sub>3</sub>. However, even after prolonged annealing times, chlorine can be detected in the films in X-ray fluorescence measurements.</p>},
  author       = {Unger, Eva L. and Bowring, Andrea R. and Tassone, Christopher J. and Pool, Vanessa L. and Gold-Parker, Aryeh and Cheacharoen, Rongrong and Stone, Kevin H. and Hoke, Eric T. and Toney, Michael F. and McGehee, Michael D.},
  issn         = {0897-4756},
  language     = {eng},
  month        = {12},
  number       = {24},
  pages        = {7158--7165},
  publisher    = {The American Chemical Society (ACS)},
  series       = {Chemistry of Materials},
  title        = {Chloride in lead chloride-derived organo-metal halides for perovskite-absorber solar cells},
  url          = {http://dx.doi.org/10.1021/cm503828b},
  doi          = {10.1021/cm503828b},
  volume       = {26},
  year         = {2014},
}