کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5354541 1503596 2016 24 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Role of the chemical substitution on the structural and luminescence properties of the mixed halide perovskite thin MAPbI3 − xBrx (0 ≤ x ≤ 1) films
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Role of the chemical substitution on the structural and luminescence properties of the mixed halide perovskite thin MAPbI3 − xBrx (0 ≤ x ≤ 1) films
چکیده انگلیسی
Mixed bromide iodide lead perovskites were prepared from methylamine, lead nitrate and the corresponding hydroX acid (X = I, Br), they were then deposited as thin films on ITO substrate by the spin coating process. X-ray diffraction analyses indicated the formation of a tetragonal phase I4/mcm up to x = 0.4 and a cubic perovskite with space group Pm3 m in the composition range of 0.6 ≤ x ≤ 1. Mixed lead perovskites showed a high absorbance in the UV-vis range. The band gap energy of thin films were estimated from absorbance spectral measurements, it was found that the onset of the absorption edge for MAPbI3 − xBrx (x < 1) thin films is ranging between 1.58 to 1.72 eV. Photoluminescence emission energies for mixed halide perovskites presented intermediate values from 781 nm (MAPbI3) to 545 nm (MAPbBr3).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 371, 15 May 2016, Pages 112-117
نویسندگان
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