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Analysis of the ZnTe [electronic resource] : Cu Contact on CdS/CdTe Solar Cells Preprint.

Pv; Cathodoluminescence (Cl); Cdte; Znte: Cu Contact; Electron-Beam Current; Depth-Dependent; Close-Space Sublimation; Secondary-Ion Mass Spectroscopy (Sims); Solar Energy - Photovoltaics.

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Bibliographic Details
Online Access:	Online Access (via OSTI)
Format:	Government Document Electronic eBook
Language:	English
Published:	Washington, D.C. : Oak Ridge, Tenn. : United States. Department of Energy ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy, 2003.
Subjects:	Cathodoluminescence. Defects. Diffusion Length. Excitation. Probes. Diffusion. Recombination. Solar Cells. Solar Energy. Materials Science.

Description
Summary:	Pv; Cathodoluminescence (Cl); Cdte; Znte: Cu Contact; Electron-Beam Current; Depth-Dependent; Close-Space Sublimation; Secondary-Ion Mass Spectroscopy (Sims); Solar Energy - Photovoltaics.
Abstract:	We report on the recent use of cathodoluminescence (CL) to probe the depth-dependent changes in radiative recombination that occur in CdTe devices during ZnTe:Cu contacting procedures. These types of CL measurements may be useful to assist in linking impurity diffusion (e.g., Cu) from the contact with depth-dependent variation in electrical activation within the CdTe layer. Variable-energy CL suggests that diffusion from the ZnTe:Cu contact interface may assist in reducing donors levels in the CdTe bulk, and thereby yield p-type material in the region near the contact. CL analysis near abrupt metal discontinuities provides estimates of diffusion lengths for carriers associated with both excitonic and donor-to-acceptor pair recombination. Finally, CL measurements at increasing excitation levels (i.e., increasing electron-beam current) provides estimates of the defect state density, as well as providing evidence that discrete multiple defect bands may exist in CdTe prior to contacting.
Item Description:	Published through SciTech Connect. 04/01/2003. "nrel/cp-520-33940" 763 ISSN 1946--4274. Prepared for the 2003 Materials Research Society Spring Meeting, San Francisco, CA (US), 04/21/2003--04/25/2003. Gessert, T. A.; Romero, M. J.; Dhere, R. G.; Asher, S. E. National Renewable Energy Lab., Golden, CO. (US)
Physical Description:	9 pages : digital, PDF file.