A Versatile Thin-Film Deposition Method for Multidimensional Semiconducting Bismuth Halides
Despite the significant progress in fabricating hybrid organic–inorganic lead halide perovskite solar cells, their toxicity and low stability remain as major drawbacks, thereby hindering large-scale commercialization. Given the isoelectronic nature of lead(II) and bismuth(III) ions, potentially st...
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| Published in | Chemistry of materials Vol. 30; no. 10; pp. 3538 - 3544 |
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| Main Authors | , , , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
American Chemical Society
22.05.2018
American Chemical Society (ACS) |
| Subjects | |
| Online Access | Get full text |
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| Abstract | Despite the significant progress in fabricating hybrid organic–inorganic lead halide perovskite solar cells, their toxicity and low stability remain as major drawbacks, thereby hindering large-scale commercialization. Given the isoelectronic nature of lead(II) and bismuth(III) ions, potentially stable and nontoxic alternatives for efficient light absorption in thin-film photovoltaic (PV) devices may be found among bismuth-based halide semiconductors. However, high-quality polycrystalline films of many of these systems have not been demonstrated. Here we present a versatile and facile two-step coevaporation approach to fabricate A3Bi2I9 (A = Cs, Rb) and AgBi2I7 polycrystalline films with smooth, pinhole-free morphology and average grain size of >200 nm. The process involves an initial two-source evaporation step (involving CsI, RbI or AgI, and BiI3 sources), followed by an annealing step under BiI3 vapor. The structural, optical, and electrical characteristics of the resulting thin films are studied by X-ray diffraction, optical spectroscopy, X-ray/UV photoelectron spectroscopy, and scanning electron microscopy. |
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| AbstractList | Despite the significant progress in fabricating hybrid organic–inorganic lead halide perovskite solar cells, their toxicity and low stability remain as major drawbacks, thereby hindering large-scale commercialization. Given the isoelectronic nature of lead(II) and bismuth(III) ions, potentially stable and nontoxic alternatives for efficient light absorption in thin-film photovoltaic (PV) devices may be found among bismuth-based halide semiconductors. However, high-quality polycrystalline films of many of these systems have not been demonstrated. Here we present a versatile and facile two-step coevaporation approach to fabricate A3Bi2I9 (A = Cs, Rb) and AgBi2I7 polycrystalline films with smooth, pinhole-free morphology and average grain size of >200 nm. The process involves an initial two-source evaporation step (involving CsI, RbI or AgI, and BiI3 sources), followed by an annealing step under BiI3 vapor. The structural, optical, and electrical characteristics of the resulting thin films are studied by X-ray diffraction, optical spectroscopy, X-ray/UV photoelectron spectroscopy, and scanning electron microscopy. Not provided. |
| Author | Sardashti, Kasra Sun, Jon-Paul Lupascu, Doru C Zhou, Hanhan Clegg, Charlotte Hill, Ian G Khazaee, Maryam Jones, Jacob L Mitzi, David B |
| AuthorAffiliation | Department of Chemistry Duke University Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE) University of Duisburg-Essen Department of Materials Science and Engineering Department of Physics and Atmospheric Science Department of Mechanical Engineering and Materials Science |
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| Title | A Versatile Thin-Film Deposition Method for Multidimensional Semiconducting Bismuth Halides |
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