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High-resolution local current measurement of CdTe solar cells

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7 Author(s)
Yoon, H.P. ; Center for Nanoscale Sci. & Technol., Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA ; Ruzmetov, D. ; Haney, P.M. ; Leite, M.S.
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We investigate local electronic properties of CdTe solar cells using electron beam to excite electron-hole pairs and evaluate spatially resolved photocurrent characteristics. Standard semiconductor processes were used to fabricate Ohmic metal contacts on the surface of p-type CdTe / n-type CdS device extracted from a commercial solar panel. An ion milling process was used to prepare cross-sections of the devices. Local injection of carriers was controlled by an acceleration voltage of electron beam (1 kV to 30 kV) in a scanning electron microscope, and the results were correlated with the local morphology, microstructure, and chemical composition of the devices.

Published in:

Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE

Date of Conference:

3-8 June 2012