Effects of Antimony Doping in Polycrystalline CdTe Thin-Film Solar Cells

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概要

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• The effects of antimony (Sb) doping of the CdTe layer in the CdTe solar cells were investigated using Sb-doped CdTe powders as source materials for CdTe deposition by the close-spaced sublimation (CSS) method. Conversion efficiency increased with increasing Sb concentration below 1\times 10^{18} cm-3, mainly owing to the improvement of the fill factor. Secondary ion microprobe mass spectrometry (SIMS) depth profile revealed that the Sb impurities at a concentration of approximately 1\times 10^{16} cm-3 were incorporated into the CdTe layer when using the Sb-doped CdTe source of 1\times 10^{18} cm-3. The observation of surface morphology showed that the grain sizes were improved by Sb addition. Therefore, the improved performance upon Sb addition to CdTe solar cells was probably due to the improvements in crystallinity, such as increased grain size.

• 2012-10-25

著者

• Hayashi Ryoji

  Department Of Biology Hokuriku University

• Okamoto Tamotsu

  Department of Electrical and Electronic Engineering, Kisarazu National College of Technology, 2-11-1 Kiyomidai-higashi, Kisarazu, Chiba 292-0041, Japan

• Yoshino Kaoru

  Department of Electrical and Electronic Engineering, Kisarazu National College of Technology, Kisarazu, Chiba 292-0041, Japan

• Hirano Ryuichi

  Electric Material Group, Thin Film Material Division, JX Nippon Mining & Metals Corporation, Chiyoda, Tokyo 100-8164, Japan

• Ikeda Shigeyuki

  Department of Electrical and Electronic Engineering, Kisarazu National College of Technology, Kisarazu, Chiba 292-0041, Japan

• Nagatsuka Satsuki

  Department of Electrical and Electronic Engineering, Kisarazu National College of Technology, Kisarazu, Chiba 292-0041, Japan

• Kanda Yohei

  Department of Electrical and Electronic Engineering, Kisarazu National College of Technology, Kisarazu, Chiba 292-0041, Japan

• Noda Akira

  Production Department, Isohara Works, JX Nippon Mining & Metals Corporation, Kitaibaraki, Ibaraki 319-1535, Japan

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