Wet chemical etched CdTe thin film solar cells
Wet chemical etched CdTe thin film solar cells
- 주제(키워드) CdTe thin film solar cells , X-ray photoelectron spectroscopy (XPS) , Low temperature photoluminescence (PL) , Nitric-phosphoric (NP) etching , CdCl2 activated heat treatment
- 발행기관 한국물리학회
- 발행년도 2013
- 총서유형 Journal
- UCI G704-001115.2013.13.1.019
- KCI ID ART001756591
- 본문언어 영어
초록/요약
Wet chemical etching process on as-deposited CdTe surface using nitric-phosphoric (NP) acid improved the efficiency of CdS/CdTe solar cells from 10.1% to 13.8%. Nitric-phosphoric (NP) acid solution etched native oxide (TeO2) layer and resolved excess cadmium on CdTe surface. After the heat treatment process activated the CdCl2, CdO layer which was believed to be a diffusion barrier of chlorine did not grow on the etched CdTe surface and new (VCd 2 e2ClTe 1þ)0 complexes was located at EV þ 0.045 eV. New (VCd 2 e2ClTe 1þ)0 complexes acted as a shallow acceptors and induced to improve Voc and Jsc. The surface of CdTe thin film has been studied using Scanning Electron Microscope (SEM), X-ray Diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and low temperature Photoluminescence (PL).
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