کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1614462 1516335 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improved performance of amorphous Si thin-film solar cells on 430 stainless steel substrate by an electrochemical mechanical polishing process
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Improved performance of amorphous Si thin-film solar cells on 430 stainless steel substrate by an electrochemical mechanical polishing process
چکیده انگلیسی

This study reports the electrochemical mechanical polishing (ECMP) technique for 430 stainless steel (SS) substrate to improve the conversion efficiency of hydrogenated amorphous silicon (a-Si:H) thin-film solar cells. The surface roughness of the untreated 430 SS substrate was ∼38 nm and decreased to ∼23 nm after ECMP processing of the 430 SS substrate. The average diffuse reflection rate decreased from 4.2% of the untreated 430 SS substrate to 1.1% for the ECMP processed 430 SS substrate. The analysis of chemical composition of passive layer on the ECMP processed 430 SS substrate was carried out by the X-ray photoelectron spectroscopic. The passive layer of ECMP processed 430 SS substrate is composed of Cr2O3 and Fe2O3. The SIMS result indicated that the diffusion of iron (Fe) and chromium (Cr) impurities from the 430 SS substrate into the a-Si:H solar cell can be suppressed by the passive layer which was formed by the ECMP process. In particular, the Cr impurity was effectively blocked from diffusing into a-Si:H layer of the ECMP processed 430 SS substrate. The decreased series resistance and increased shunt resistance for the a-Si:H solar cells on the ECMP processed 430 SS substrate, due to a reduction in the Cr and Fe deep-level defect density, resulted in the cell conversion efficiency increasing to 5.4%. The ECMP process provides an available surface treatment technique for achieving high conversion efficiency of a-Si:H thin-film solar cells on a 430 SS substrate.


► A mirror-like 430 stainless steel substrate can be achieved by ECMP process.
► The diffusion of Cr and Fe impurities was suppressed into a-Si:H solar cells.
► ECMP processed 430 stainless steel substrate can improve the cell’s efficiency.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 558, 5 May 2013, Pages 95–98
نویسندگان
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