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Planar Type Trivalent Bismuth Based Pb-Free Perovskite Solar Cells
- Authors
- Heo, Jin Hyuck; Lee, Min Ho; Song, Dae Ho; Song, Chang Eun; Lee, Jae-Joon; Hong, Ki-Ha; Im, Sang Hyuk
- Issue Date
- Apr-2018
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Trivalent; Bismuth; Pb-Free; Perovskite; Solar Cells
- Citation
- NANOSCIENCE AND NANOTECHNOLOGY LETTERS, v.10, no.4, pp.591 - 595
- Indexed
- SCIE
- Journal Title
- NANOSCIENCE AND NANOTECHNOLOGY LETTERS
- Volume
- 10
- Number
- 4
- Start Page
- 591
- End Page
- 595
- ISSN
- 1941-4900
- Abstract
- An 8% stable planar type trivalent Bi-based Cs3Bi2I9 perovskite-sensitized solar cell (P-SSC) was demonstrated by fabricating a glass/FTO (F doped tin oxide)/TiO2/Cs3Bi2I9/PTAA (poly-triary-lamine)/Au construction. The Cs3Bi2I9 perovskite film formed by Cs3Bi2I9/N,N-dimethylformamide/HI solution featured a pure crystalline phase and excellent thermal stability. The unencapsulated Cs3Bi2I9 P-SSC maintained its initial efficiency for >500 h under continuous light soaking by 1 Sun at 65 degrees C and 60-70% relative humidity. Its functional stability may be due to the trivalent Bi based perovskite structure being more robust than the divalent Pb based perovskite one.
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