Fengshuo Zu, Patrick Amsalem, David A. Egger, Rongbin Wang, Christian Michael Wolff, Honghua Fang, Maria Antonietta Loi, Dieter Neher, Leeor Kronik, Steffen Duhm, Norbert Koch
- Photovoltaic cells based on halide perovskites, possessing remarkably high power conversion efficiencies have been reported. To push the development of such devices further, a comprehensive and reliable understanding of their electronic properties is essential but presently not available. To provide a solid foundation for understanding the electronic properties of polycrystalline thin films, we employ single-crystal band structure data from angle-resolved photoemission measurements. For two prototypical perovskites (CH3NH3PbBr3 and CH3NH3PbI3), we reveal the band dispersion in two high-symmetry directions and identify the global valence band maxima. With these benchmark data, we construct "standard" photoemission spectra from polycrystalline thin film samples and resolve challenges discussed in the literature for determining the valence band onset with high reliability. Within the framework laid out here, the consistency of relating the energy level alignment in perovskite-based photovoltaic and optoelectronic devices with theirPhotovoltaic cells based on halide perovskites, possessing remarkably high power conversion efficiencies have been reported. To push the development of such devices further, a comprehensive and reliable understanding of their electronic properties is essential but presently not available. To provide a solid foundation for understanding the electronic properties of polycrystalline thin films, we employ single-crystal band structure data from angle-resolved photoemission measurements. For two prototypical perovskites (CH3NH3PbBr3 and CH3NH3PbI3), we reveal the band dispersion in two high-symmetry directions and identify the global valence band maxima. With these benchmark data, we construct "standard" photoemission spectra from polycrystalline thin film samples and resolve challenges discussed in the literature for determining the valence band onset with high reliability. Within the framework laid out here, the consistency of relating the energy level alignment in perovskite-based photovoltaic and optoelectronic devices with their functional parameters is substantially enhanced.…
MetadatenAuthor details: | Fengshuo Zu, Patrick AmsalemORCiD, David A. EggerORCiD, Rongbin Wang, Christian Michael WolffORCiDGND, Honghua Fang, Maria Antonietta LoiORCiD, Dieter NeherORCiDGND, Leeor KronikORCiD, Steffen DuhmORCiD, Norbert KochORCiD |
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DOI: | https://doi.org/10.1021/acs.jpclett.8b03728 |
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ISSN: | 1948-7185 |
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Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/30642163 |
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Title of parent work (English): | The journal of physical chemistry letters |
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Publisher: | American Chemical Society |
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Place of publishing: | Washington |
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Publication type: | Article |
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Language: | English |
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Date of first publication: | 2019/02/07 |
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Publication year: | 2019 |
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Release date: | 2021/04/08 |
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Volume: | 10 |
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Issue: | 3 |
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Number of pages: | 17 |
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First page: | 601 |
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Last Page: | 609 |
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Funding institution: | Helmholtz Energy Alliance "Hybrid Photovoltaics"; Joint Graduate School HyPerCells of the University of Potsdam; Helmholtz Zentrum BerlinHelmholtz Association; DFGGerman Research Foundation (DFG) [SFB951, AM 419/1-1]; 111 Project of the Chinese State Administration of Foreign Experts Affairs; Collaborative Innovation Center of Suzhou Nano Science & Technology (NANO CIC); Sustainability and Energy Research Initiative (SAERI) at the Weizmann Institute; Minerva Foundation; Alexander von Humboldt FoundationAlexander von Humboldt Foundation |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
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DDC classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
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Peer review: | Referiert |
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