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Title: Tunable optical properties and stability of lead free all inorganic perovskites (Cs2SnIxCl6-x)

Journal Article · · Journal of Materials Chemistry. A
DOI:https://doi.org/10.1039/c7ta10040j· OSTI ID:1461327
 [1];  [1];  [2];  [3];  [1];  [4];  [3];  [5];  [2]; ORCiD logo [1]
  1. Rensselaer Polytechnic Inst., Troy, NY (United States). Dept. of Mechanical, Aerospace and Nuclear Engineering
  2. Rensselaer Polytechnic Inst., Troy, NY (United States). Dept. of Materials Science and Engineering
  3. China Univ. of Geosciences, Beijing (China). Beijing Key Lab. of Materials Utilization of Nonmetallic Minerals and Solid Wastes. National Lab. of Mineral Materials. School of Materials Science and Technology
  4. Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division. Advanced Photon Source
  5. Rensselaer Polytechnic Inst., Troy, NY (United States). Dept. of Chemical and Biological Engineering. Dept. of Electrical, Computer and Systems Engineering
+ Show Author Affiliations

Organic–inorganic hybrid lead-based perovskites experience significant environmental instability under ambient moist air and are not environmentally benign due to the usage of toxic Pb. In this paper, we report a new approach to synthesize lead-free all inorganic perovskites (Cs2SnIxCl6-x) using hydriodic acid (HI) demonstrating greatly enhanced environmental stability and tunable optical properties by controlling the I-/Cl- ratios. Single phase perovskites can be achieved with a low iodine or chlorine content, and a phase separation occurs in the binary system with closer iodine and chlorine dopings. UV-vis diffuse reflectance and photoluminescence measurements reveal tunable band gaps of Cs2SnIxCl6-x perovskites from the UV to the infrared region. The mixed halide perovskite with a lower chloride content shows significantly higher photoluminescence intensity. The thermal stability of mixed halide all-inorganic perovskites is continuously improved as the Cl content increases. Finally, the synthesis of Sn-based perovskites with tunable optical properties and environmental stability represents one step further toward the realization of the stable lead-free all inorganic perovskites.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Rensselaer Polytechnic Inst., Troy, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Performance and Design of Nuclear Waste Forms and Containers (WastePD)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357; SC0016584; 1706815; 1635520
OSTI ID:
1461327
Journal Information:
Journal of Materials Chemistry. A, Vol. 6, Issue 6; ISSN 2050-7488
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 47 works
Citation information provided by
Web of Science

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Cited By (10)

From Lead Halide Perovskites to Lead‐Free Metal Halide Perovskites and Perovskite Derivatives journal January 2019
Progress of Lead‐Free Halide Double Perovskites journal January 2019
Dimensionally Engineered Perovskite Heterostructure for Photovoltaic and Optoelectronic Applications journal October 2019
Tin Halide Perovskites: Progress and Challenges journal April 2020
Structural, Optical, and Thermal Properties of Cs 2 SnI 6 - x Br x Mixed Perovskite Solid Solutions: Structural, Optical, and Thermal Properties of Cs 2 SnI 6 - x Br x Mixed Perovskite Solid Solutions journal May 2019
Alleviating hysteresis and improving efficiency of MA1−yFAyPbI3−xBrx perovskite solar cells by controlling the halide composition journal August 2018
Deciphering the degradation mechanism of the lead-free all inorganic perovskite Cs2SnI6 journal February 2019
All-inorganic lead-free perovskites for optoelectronic applications journal January 2019
Tuning the band gap of hybrid lead free defect perovskite nano crystals for solar cell applications journal January 2019
Lead-free hybrid perovskites for photovoltaics journal January 2018

Figures / Tables (7)

Fig. 1(p. 2)figure Fig. 1
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Table 1(p. 5)table Table 1
Fig. 3(p. 6)figure Fig. 3
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Fig. 5(p. 8)figure Fig. 5
Fig. 6(p. 10)figure Fig. 6

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY