標題: Switching between spectral broadening and narrowing of the exciton absorption band of a CH3NH3PbI3 film on altering the polarity of an applied electric field
作者: Awasthi, Kamlesh
Kala, Kannankutty
Rana, Shailesh
Diau, Eric Wei-Guang
Ohta, Nobuhiro
交大名義發表
應用化學系
應用化學系分子科學碩博班
National Chiao Tung University
Department of Applied Chemistry
Institute of Molecular science
公開日期: 22-Jun-2020
摘要: Electric field-induced broadening and narrowing of an exciton absorption band have been observed to depend on the polarity of the applied electric field for methylammonium lead triiodide perovskite (MAPbI(3)) as a thin film sandwiched between a conducting film of fluorine-doped tin oxide (FTO) and an insulating film of poly(methyl methacrylate) (PMMA). The width of the absorption band increased or decreased when the direction of the applied field was toward FTO or PMMA, respectively, indicating that the spectral broadening and narrowing become switchable on altering the direction of the applied electric field. When titanium oxide (TiO2) in a compact layer was introduced between the MAPbI(3) and FTO layers, the linear electric field effect that depended on the polarity was either not observed or decreased significantly although the quadratic field effects on the exciton absorption band were similarly observed with or without the TiO2 layer.
URI: http://dx.doi.org/10.1063/5.0009029
http://hdl.handle.net/11536/154986
ISSN: 0003-6951
DOI: 10.1063/5.0009029
期刊: APPLIED PHYSICS LETTERS
Volume: 116
Issue: 25
起始頁: 0
結束頁: 0
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