CẤU TRÚC TINH THỂ VÀ ĐẶC TÍNH QUANG ĐIỆN CỦA HẠT TINH THỂ PEROVSKITE LAI VÔ CƠ - HỮU CƠ KÍCH THƯỚC MICROMET

Tóm tắt

In this study, we characterize the crystal structure and optoelectronic properties of the hybrid organicinorganic perovskite CH3NH3PbBr3 fabricating by precursor solution-dipping on
glass/FTO/PEDOT:PSS substrate. Structural analysis results reveal that the as-fabricated perovskite is
microsized single crystal particles, belonging to the cubic crystal system in space group Pm m, with
lattice parameters of a = b = c = 5.92 Å,  =  =  = 90o
, V = 207.42 Å3 and having a preferred
orientation of (n00) representing by the corresponding high-intensity diffraction peaks. The crystals
show a relatively strong absorption with an optical energy band gap of Eg = 2.99 eV. The I - V
characterization for the crystals exhibits strong current responses under excited-light irradiation. This
work is proposed to offer a potential opportunity for efficient micro optoelectronic devices based on
microsized CH3NH3PbBr3 single crystals