Pin-Hole-Free, Homogeneous, Pure CsPbBr3 Films on Flat Substrates by Simple Spin-Coating Modification
We show a simple modification of spin-coating to obtain pinhole-free, well-covering and uniform films of an all-inorganic Pb-halide perovskite (Pb-HaP), on a flat substrate (i.e., not mesoporous) at standard temperature and pressure. In Pb-HaP-based devices the active film is generally fabricated by...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2020-06-01
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| Series: | Frontiers in Energy Research |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fenrg.2020.00100/full |
| _version_ | 1828859212111806464 |
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| author | Satyajit Gupta Satyajit Gupta Michael Kulbak David Cahen |
| author_facet | Satyajit Gupta Satyajit Gupta Michael Kulbak David Cahen |
| author_sort | Satyajit Gupta |
| collection | DOAJ |
| description | We show a simple modification of spin-coating to obtain pinhole-free, well-covering and uniform films of an all-inorganic Pb-halide perovskite (Pb-HaP), on a flat substrate (i.e., not mesoporous) at standard temperature and pressure. In Pb-HaP-based devices the active film is generally fabricated by spin-coating. This is a challenging task for purely inorganic Pb-HaPs, as, except if nano-crystallites can be used, mostly rough and inhomogeneous thin films with poor optoelectronic quality are obtained. We describe a gas flow-assisted method to fabricate thin conformal films of phase-pure CsPbBr3. First cells made with the resulting CsPbBr3-films, yield solar conversion efficiencies up to 2.5%. Electron beam-induced current measurements of device cross-sections show uniform charge generation profiles, implying ≥ ~ 0.2 μm diffusion lengths. Non-encapsulated devices generate stable photocurrent for > 1 hr under continuous illumination at maximum power in ambient. |
| first_indexed | 2024-12-13T02:12:36Z |
| format | Article |
| id | doaj.art-ed8ee07805734743bca5a0d4057180c0 |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-12-13T02:12:36Z |
| publishDate | 2020-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-ed8ee07805734743bca5a0d4057180c02022-12-22T00:02:58ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2020-06-01810.3389/fenrg.2020.00100504500Pin-Hole-Free, Homogeneous, Pure CsPbBr3 Films on Flat Substrates by Simple Spin-Coating ModificationSatyajit Gupta0Satyajit Gupta1Michael Kulbak2David Cahen3Department of Materials & Interfaces Weizmann Institute of Science, Rehovot, IsraelDepartment of Chemistry, Indian Institute of Technology Bhilai, Chhattisgarh, IndiaDepartment of Materials & Interfaces Weizmann Institute of Science, Rehovot, IsraelDepartment of Materials & Interfaces Weizmann Institute of Science, Rehovot, IsraelWe show a simple modification of spin-coating to obtain pinhole-free, well-covering and uniform films of an all-inorganic Pb-halide perovskite (Pb-HaP), on a flat substrate (i.e., not mesoporous) at standard temperature and pressure. In Pb-HaP-based devices the active film is generally fabricated by spin-coating. This is a challenging task for purely inorganic Pb-HaPs, as, except if nano-crystallites can be used, mostly rough and inhomogeneous thin films with poor optoelectronic quality are obtained. We describe a gas flow-assisted method to fabricate thin conformal films of phase-pure CsPbBr3. First cells made with the resulting CsPbBr3-films, yield solar conversion efficiencies up to 2.5%. Electron beam-induced current measurements of device cross-sections show uniform charge generation profiles, implying ≥ ~ 0.2 μm diffusion lengths. Non-encapsulated devices generate stable photocurrent for > 1 hr under continuous illumination at maximum power in ambient.https://www.frontiersin.org/article/10.3389/fenrg.2020.00100/fullthin filmssolar cellhalide perovskitestabilityelectron beam-induced current |
| spellingShingle | Satyajit Gupta Satyajit Gupta Michael Kulbak David Cahen Pin-Hole-Free, Homogeneous, Pure CsPbBr3 Films on Flat Substrates by Simple Spin-Coating Modification Frontiers in Energy Research thin films solar cell halide perovskite stability electron beam-induced current |
| title | Pin-Hole-Free, Homogeneous, Pure CsPbBr3 Films on Flat Substrates by Simple Spin-Coating Modification |
| title_full | Pin-Hole-Free, Homogeneous, Pure CsPbBr3 Films on Flat Substrates by Simple Spin-Coating Modification |
| title_fullStr | Pin-Hole-Free, Homogeneous, Pure CsPbBr3 Films on Flat Substrates by Simple Spin-Coating Modification |
| title_full_unstemmed | Pin-Hole-Free, Homogeneous, Pure CsPbBr3 Films on Flat Substrates by Simple Spin-Coating Modification |
| title_short | Pin-Hole-Free, Homogeneous, Pure CsPbBr3 Films on Flat Substrates by Simple Spin-Coating Modification |
| title_sort | pin hole free homogeneous pure cspbbr3 films on flat substrates by simple spin coating modification |
| topic | thin films solar cell halide perovskite stability electron beam-induced current |
| url | https://www.frontiersin.org/article/10.3389/fenrg.2020.00100/full |
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