标题:Modifying CH3NH3PbBr3nanocrystals with arylamines
作者:Zhu, Ruimin ;Liu, Heyuan ;Shen, Li ;Sun, Dejun ;Li, Xiyou
作者机构:[Zhu, Ruimin ;Sun, Dejun ;Li, Xiyou ] Department of Chemistry, Shandong University, Jinan; Shandong; 250100, China;[Liu, Heyuan ;Shen, Li ;Li, Xiyou ] 更多
通讯作者:Sun, Dejun
来源:Journal of Physics and Chemistry of Solids
出版年:2017
卷:103
页码:164-169
DOI:10.1016/j.jpcs.2016.12.018
摘要:Chemically decorating CH3NH3PbBr3with a group of para-substituted arylamine (R-An) was investigated, where R ranges from electron-withdrawing trifluoromethoxy(-CF3O), to hydrogen or electron-donating ethoxy (-EtO). Different ratios of R-An ammonium bromide and methylammonium bromide (MA) (R-An/MA=3/7, 4/6, 5/5, 6/4 and 7/3) were tested. XRD patterns revealed that the perovskite nanocomposite were cubic with good crystallinity. TEM and photoluminescence suggested that the perovskite nanocrystals were composed of 2D layered and 3D bulk structures.1H NMR and TGA experiments revealed that the non-substituted aniline can readily adsorb to the surface of perovskite at any ratios between R-An and MA. But an EtOAn/MA ratio ≥1 is needed to anchor the EOAn molecules on the surface of perovskite. For the arylamine with the electron-withdrawing -CF3O group, it cannot adsorb to the surface of the perovskite at any concentrations. This result reveals that both steric hindrance and alkalinity can affect the anchoring of arylamine on the surface of CH3NH3PbBr3perovskite. I-V curves of the perovskite nanocrystal films prepared by spin coating suggest that proper surface modification can increase the conductivity significantly.
© 2016 Elsevier Ltd
收录类别:EI
资源类型:期刊论文
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