کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6534820 | 49294 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical modification of the optical and electrical properties of Cd-rich NixCd1-xO alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Electrochemical modification of the optical and electrical properties of Cd-rich NixCd1-xO alloys Electrochemical modification of the optical and electrical properties of Cd-rich NixCd1-xO alloys](/preview/png/6534820.png)
چکیده انگلیسی
Enhancement of the optical and electrical properties of Cd-rich NixCd1âxO alloys was achieved through an electrochemical procedure - their biasing at a constant negative potential into an electrolyte. Depending on the conductivity of the film (correlated to x), the films changed their color from transparent-yellowish to black. For a certain bias, the coloration became permanent and irreversible. Electron concentration for some samples increased for better than two orders of magnitude upon the coloration, while as the mobility decreased for a factor of 2-10. Rutherford Back Scattering (RBS) analysis revealed oxygen deficiency for the colored samples. The XRD analysis showed that the coloration could be associated to a partial reduction of CdO2 to CdO. XPS analysis suggested complex red-ox transitions of the two Ni and two Cd-oxides within the alloy. Ni2p electrons suggested that a partial NiO (transparent) transition to Ni2O3 (black) is likely the responsible process for the occurrence of the intensive light trapping. Since the NixCd1âxO band gap is tunable with x, one may conclude that this electrochemical procedure is motivating for tuning/modification/enhancement of the both, the absorption and conductivity of NixCd1âxO films for their possible application as integrated film photoanodes (TCO and PEC cell in one) within a hybrid water splitting device.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy Materials and Solar Cells - Volume 147, April 2016, Pages 127-133
Journal: Solar Energy Materials and Solar Cells - Volume 147, April 2016, Pages 127-133
نویسندگان
Mimoza M. Ristova, Christopher Francis, Francesca M. Toma, Kin M. Yu, Wladislaw Walukiewicz,