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 â xBrx (0 â¤Â x â¤Â 1) films
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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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 â¤Â x â¤Â 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 â 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
Journal: Applied Surface Science - Volume 371, 15 May 2016, Pages 112-117
نویسندگان
Lahoucine Atourki, Erika Vega, Bernabé MarÃ, Miguel Mollar, Hassan Ait Ahsaine, Khalid Bouabid, Ahmed Ihlal,