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Publication Citation: Local electrical characterizations of cadmium telluride solar cells using low energy electron beam

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Author(s): Heayoung Yoon; Paul M. Haney; Dmitry A. Ruzmetov; Hua Xu; Marina S. Leite; Behrang H. Hamadani; Albert A. Talin;
Title: Local electrical characterizations of cadmium telluride solar cells using low energy electron beam
Published: October 01, 2013
Abstract: We investigate local electronic properties of cadmium telluride solar cells using electron beam induced current (EBIC) measurements with current-collecting patterned contacts. EBIC measurements are performed with a spatial resolution as high as ≈20 nm both on the top surface and throughout the cross-section of the device, revealing an enhanced carrier collection in the vicinity of grain boundaries. Furthermore, we measure local current-voltage characteristics using contacts with dimension both larger (≈5 µm × 10 µm) and smaller (≈1 µm × 1 µm) than the device thickness (≈4 m), finding that the value of local open-circuit voltage is also larger near grain boundaries.
Citation: Solar Energy Materials and Solar Cells
Volume: 117
Pages: pp. 499 - 504
Keywords: solar cell; thin film; CdTe; grain boundary; electron beam induced current; EBIC, cross section; focused ion beam; FIB
Research Areas: Electron microscopy (EM, TEM, SEM, STEM), Solar
DOI: http://dx.doi.org/10.1016/j.solmat.2013.07.024  (Note: May link to a non-U.S. Government webpage)
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