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Title: Performance Enhancement of Lead-Free Tin-Based Perovskite Solar Cells with Reducing Atmosphere-Assisted Dispersible Additive

Journal Article · · ACS Energy Letters
 [1]; ORCiD logo [2];  [3]; ORCiD logo [1]
  1. Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry
  2. Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry; Mitsubishi Chemical Group Science and Technology Research Center, Inc., (Japan)
  3. Mitsubishi Chemical Group Science and Technology Research Center, Inc., (Japan)

Sn-based halide perovskite materials have attracted tremendous attention and have been employed successfully in solar cells. However, their high conductivities resulting from the unstable divalent Sn state in the structure cause poor device performance and poor reproducibility. Herein, we used excess tin iodide (SnI2) in Sn-based halide perovskite solar cells (ASnI3, A = Cs, methylammonium and formamidinium tin iodide as the representative light absorbers), combined with a reducing atmosphere to stabilize the Sn2+ state. Excess SnI2 can disperse uniformly into the perovskite films and functions as a compensator as well as a suppressor of Sn2+ vacancies thereby effectively reducing the p-type conductivity. This process significantly improved the solar-cell performances of all the ASnI3 materials on mesoporous TiO2. Optimized CsSnI3 devices achieved a maximum power conversion efficiency of 4.81%, which is the highest among all inorganic Pb-free perovskite solar cells to date.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Argonne-Northwestern Solar Energy Research Center (ANSER)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001059
OSTI ID:
1470357
Journal Information:
ACS Energy Letters, Vol. 2, Issue 4; Related Information: ANSER partners with Northwestern University (lead); Argonne National Laboratory; University of Chicago; University of Illinois, Urbana-Champaign; Yale University; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 221 works
Citation information provided by
Web of Science

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Will organic–inorganic hybrid halide lead perovskites be eliminated from optoelectronic applications? journal January 2019
Alloy-induced phase transition and enhanced photovoltaic performance: the case of Cs 3 Bi 2 I 9−x Br x perovskite solar cells journal January 2019
Lead‐Free Solar Cells based on Tin Halide Perovskite Films with High Coverage and Improved Aggregation journal October 2018
Lead-free double halide perovskite Cs 3 BiBr 6 with well-defined crystal structure and high thermal stability for optoelectronics journal January 2019
Recent advances toward efficient and stable tin‐based perovskite solar cells journal December 2019
Reducing trap density and carrier concentration by a Ge additive for an efficient quasi 2D/3D perovskite solar cell journal January 2020
Highly stable and efficient all-inorganic lead-free perovskite solar cells with native-oxide passivation journal January 2019
Polymer assist crystallization and passivation for enhancements of open-circuit voltage and stability in tin-halide perovskite solar cells journal October 2018
Metal replacement in perovskite solar cell materials: chemical bonding effects and optoelectronic properties journal January 2018
Recent progress of inorganic perovskite solar cells journal January 2019
Review on Recent Progress of All‐Inorganic Metal Halide Perovskites and Solar Cells journal September 2019
Synergy Effect of Both 2,2,2-Trifluoroethylamine Hydrochloride and SnF 2 for Highly Stable FASnI 3−x Cl x Perovskite Solar Cells journal January 2019
Efficient CsSnI 3 -based inorganic perovskite solar cells based on a mesoscopic metal oxide framework via incorporating a donor element journal January 2020
Emerging inorganic solar cell efficiency tables (Version 1) journal July 2019
Tin Halide Perovskites: Progress and Challenges journal April 2020
Photophysics of lead-free tin halide perovskite films and solar cells journal August 2019
Cs 1−x Rb x SnI 3 light harvesting semiconductors for perovskite photovoltaics journal January 2018
Convenient preparation of CsSnI 3 quantum dots, excellent stability, and the highest performance of lead-free inorganic perovskite solar cells so far journal January 2019
Antioxidant Grain Passivation for Air-Stable Tin-Based Perovskite Solar Cells journal December 2018
Molecular Interlayers in Hybrid Perovskite Solar Cells journal September 2017
Green fabrication of stable lead-free bismuth based perovskite solar cells using a non-toxic solvent journal August 2019
Potential Substitutes for Replacement of Lead in Perovskite Solar Cells: A Review journal July 2019
Lead and HTM Free Stable Two‐Dimensional Tin Perovskites with Suitable Band Gap for Solar Cell Applications journal December 2018
Efficient and stable tin-based perovskite solar cells by introducing π-conjugated Lewis base journal December 2019
Inorganic halide perovskite materials and solar cells journal December 2019
Chemical stability and instability of inorganic halide perovskites journal January 2019
Advances in solution-processable near-infrared phototransistors journal January 2019
Roadmap on halide perovskite and related devices journal January 2020
A computational approach to interface engineering of lead-free CH 3 NH 3 SnI 3 highly-efficient perovskite solar cells journal January 2018
Lead-Free Hybrid Perovskite Absorbers for Viable Application: Can We Eat the Cake and Have It too? journal November 2017
Ambient-air-stable inorganic Cs 2 SnI 6 double perovskite thin films via aerosol-assisted chemical vapour deposition journal January 2018
Orientation Regulation of Tin‐Based Reduced‐Dimensional Perovskites for Highly Efficient and Stable Photovoltaics journal February 2019
Boosting the performance and stability of quasi-two-dimensional tin-based perovskite solar cells using the formamidinium thiocyanate additive journal January 2018
Stabilization of Inorganic CsPb 0.5 Sn 0.5 I 2 Br Perovskite Compounds by Antioxidant Tea Polyphenol journal December 2019
Lead-free hybrid perovskites for photovoltaics journal January 2018
Stability enhancement of lead‐free CsSnI 3 perovskite photodetector with reductive ascorbic acid additive journal January 2020
Lead‐Free Tin‐Based Perovskite Solar Cells: Strategies Toward High Performance journal May 2019
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Present Status and Research Prospects of Tin‐based Perovskite Solar Cells journal August 2019
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Lead‐Free Solar Cells based on Tin Halide Perovskite Films with High Coverage and Improved Aggregation journal September 2018
Lead and HTM Free Stable Two-Dimensional Tin Perovskites with Suitable Band Gap for Solar Cell Applications journal December 2018
A Cation-Exchange Approach for the Fabrication of Efficient Methylammonium Tin Iodide Perovskite Solar Cells journal April 2019
First–Principles Investigation of the Structural, Elastic, Electronic, and Optical Properties of α– and β–SrZrS3: Implications for Photovoltaic Applications journal February 2020