Raman scattering studies of surface-modified CdTe

Bose, D. N. ; Holtz, M. (1987) Raman scattering studies of surface-modified CdTe Materials Letters, 05 (7-8). pp. 291-295. ISSN 0167-577X

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/016757...

Related URL: http://dx.doi.org/10.1016/0167-577X(87)90114-5


Surfaces of n- and p-CdTe have been examined by Raman scattering before and after ruthenium surface modification. Prior to modification, the K2 Cr2 O7 : H2 SO4 etch followed by Na2 S2 O8 rinse was found to leave a thin layer of elemental Te on bulk CdTe, as identified from characteristic Raman lines. Ru modification led to depletion of Cd at the surface and the growth of a layer of TeO2, with CdTeO3 also being evident on p-CdTe. These results are compared with previous XPS and solar cell studies to explain the beneficial effects of surface modification.

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