کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7674918 1495713 2013 26 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of laser wavelength on the laser induced breakdown spectroscopy measurement of thin CuIn 1− xGaxSe2 solar cell films
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Influence of laser wavelength on the laser induced breakdown spectroscopy measurement of thin CuIn 1− xGaxSe2 solar cell films
چکیده انگلیسی
Laser induced breakdown spectroscopy (LIBS) measurement of thin CuInxGa 1− xSe2 (CIGS) films (1.2-1.9 μm) with varying Ga to In ratios was carried out using the fundamental (1064 nm) and second harmonic (532 nm) wavelength Nd:YAG lasers (τ = 5 ns, spot diameter = 150 μm, top-hat profile) in air. The concentration ratios of Ga to In, xGa ≡ Ga/(Ga + In), of the CIGS samples ranged from 0.027 to 0.74 for which the band gap varied nearly proportionally to xGa from 0.96 to 1.42. It was found that the LIBS signal of 1064 nm (1.17 eV) wavelength laser was significantly influenced by xGa, whereas that of the 532 nm (2.34 eV) laser was consistent for all values of xGa. The observed dependency of the LIBS signal intensity on the laser wavelength was attributed to the large difference of photon energy of the two wavelengths that changed the absorption of incident laser energy by the film. The 532 nm wavelength was found to be advantageous for multi-shot analysis that enabled depth profile analysis of the thin CIGS films and for improving measurement precision by averaging the multi-shot LIBS spectra.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part B: Atomic Spectroscopy - Volume 88, 1 October 2013, Pages 20-25
نویسندگان
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