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Title: Overcoming Short-Circuit in Lead-Free CH 3NH 3SnI 3 Perovskite Solar Cells via Kinetically Controlled Gas–Solid Reaction Film Fabrication Process

Abstract

The development of Sn-based perovskite solar cells has been challenging because devices often show short-circuit behavior due to poor morphologies and undesired electrical properties of the thin films. A low-temperature vapor-assisted solution process (LT-VASP) has been employed as a novel kinetically controlled gas–solid reaction film fabrication method to prepare lead-free CH 3NH 3SnI 3 thin films. We show that the solid SnI 2 substrate temperature is the key parameter in achieving perovskite films with high surface coverage and excellent uniformity. The resulting high-quality CH 3NH 3SnI 3 films allow the successful fabrication of solar cells with drastically improved reproducibility, reaching an efficiency of 1.86%. Furthermore, our Kelvin probe studies show the VASP films have a doping level lower than that of films prepared from the conventional one-step method, effectively lowering the film conductivity. Above all, with (LT)-VASP, the short-circuit behavior often obtained from the conventional one-step-fabricated Sn-based perovskite devices has been overcome. Finally, this study facilitates the path to more successful Sn-perovskite photovoltaic research.

Authors:
 [1];  [2];  [2];  [2];  [3];  [3];  [2]
  1. Northwestern Univ., Evanston, IL (United States); Mitsubishi Chemical Group Science & Technology Research Center, Inc., Yokohama (Japan)
  2. Northwestern Univ., Evanston, IL (United States)
  3. Mitsubishi Chemical Group Science & Technology Research Center, Inc., Yokohama (Japan)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Argonne-Northwestern Solar Energy Research Center (ANSER)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1371251
Grant/Contract Number:  
SC0001059; DMR-1121262
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physical Chemistry Letters
Additional Journal Information:
Journal Volume: 7; Journal Issue: 5; Related Information: ANSER partners with Northwestern University (lead); Argonne National Laboratory; University of Chicago; University of Illinois, Urbana-Champaign; Yale University; Journal ID: ISSN 1948-7185
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; 14 SOLAR ENERGY; catalysis (homogeneous); catalysis (heterogeneous); solar (photovoltaic); solar (fuels); photosynthesis (natural and artificial); bio-inspired; hydrogen and fuel cells; electrodes - solar; defects; charge transport; spin dynamics; membrane; materials and chemistry by design; optics; synthesis (novel materials); synthesis (self-assembly)

Citation Formats

Yokoyama, Takamichi, Cao, Duyen H., Stoumpos, Constantinos C., Song, Tze-Bin, Sato, Yoshiharu, Aramaki, Shinji, and Kanatzidis, Mercouri G. Overcoming Short-Circuit in Lead-Free CH3NH3SnI3 Perovskite Solar Cells via Kinetically Controlled Gas–Solid Reaction Film Fabrication Process. United States: N. p., 2016. Web. doi:10.1021/acs.jpclett.6b00118.
Yokoyama, Takamichi, Cao, Duyen H., Stoumpos, Constantinos C., Song, Tze-Bin, Sato, Yoshiharu, Aramaki, Shinji, & Kanatzidis, Mercouri G. Overcoming Short-Circuit in Lead-Free CH3NH3SnI3 Perovskite Solar Cells via Kinetically Controlled Gas–Solid Reaction Film Fabrication Process. United States. doi:10.1021/acs.jpclett.6b00118.
Yokoyama, Takamichi, Cao, Duyen H., Stoumpos, Constantinos C., Song, Tze-Bin, Sato, Yoshiharu, Aramaki, Shinji, and Kanatzidis, Mercouri G. Mon . "Overcoming Short-Circuit in Lead-Free CH3NH3SnI3 Perovskite Solar Cells via Kinetically Controlled Gas–Solid Reaction Film Fabrication Process". United States. doi:10.1021/acs.jpclett.6b00118. https://www.osti.gov/servlets/purl/1371251.
@article{osti_1371251,
title = {Overcoming Short-Circuit in Lead-Free CH3NH3SnI3 Perovskite Solar Cells via Kinetically Controlled Gas–Solid Reaction Film Fabrication Process},
author = {Yokoyama, Takamichi and Cao, Duyen H. and Stoumpos, Constantinos C. and Song, Tze-Bin and Sato, Yoshiharu and Aramaki, Shinji and Kanatzidis, Mercouri G.},
abstractNote = {The development of Sn-based perovskite solar cells has been challenging because devices often show short-circuit behavior due to poor morphologies and undesired electrical properties of the thin films. A low-temperature vapor-assisted solution process (LT-VASP) has been employed as a novel kinetically controlled gas–solid reaction film fabrication method to prepare lead-free CH3NH3SnI3 thin films. We show that the solid SnI2 substrate temperature is the key parameter in achieving perovskite films with high surface coverage and excellent uniformity. The resulting high-quality CH3NH3SnI3 films allow the successful fabrication of solar cells with drastically improved reproducibility, reaching an efficiency of 1.86%. Furthermore, our Kelvin probe studies show the VASP films have a doping level lower than that of films prepared from the conventional one-step method, effectively lowering the film conductivity. Above all, with (LT)-VASP, the short-circuit behavior often obtained from the conventional one-step-fabricated Sn-based perovskite devices has been overcome. Finally, this study facilitates the path to more successful Sn-perovskite photovoltaic research.},
doi = {10.1021/acs.jpclett.6b00118},
journal = {Journal of Physical Chemistry Letters},
number = 5,
volume = 7,
place = {United States},
year = {2016},
month = {2}
}

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Works referencing / citing this record:

Reversible Band Gap Narrowing of Sn-Based Hybrid Perovskite Single Crystal with Excellent Phase Stability
journal, October 2018

  • Ju, Dianxing; Zheng, Xiaopeng; Liu, Jialiang
  • Angewandte Chemie International Edition, Vol. 57, Issue 45
  • DOI: 10.1002/anie.201810481

Potential Substitutes for Replacement of Lead in Perovskite Solar Cells: A Review
journal, July 2019

  • Kour, Ravinder; Arya, Sandeep; Verma, Sonali
  • Global Challenges, Vol. 3, Issue 11
  • DOI: 10.1002/gch2.201900050

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