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Optical Properties of CdS and CdTe Sensitized ZnO Nanorods

Published online by Cambridge University Press:  10 June 2014

C. J. Pereyra ,
F. Ferrer ,
R. E. Marotti ,
C. Gómez ,
L. Campo ,
L. I. Amy ,
F. Martín ,
D. Leinen ,
J. R. Ramos-Barrado  and
E. A. Dalchiele
C. J. Pereyra
Affiliation:
Instituto de Física & CINQUIFIMA, Facultad de Ingeniería, Universidad de la República, Montevideo, Uruguay.
F. Ferrer
Affiliation:
Instituto de Física & CINQUIFIMA, Facultad de Ingeniería, Universidad de la República, Montevideo, Uruguay.
R. E. Marotti
Affiliation:
Instituto de Física & CINQUIFIMA, Facultad de Ingeniería, Universidad de la República, Montevideo, Uruguay.
C. Gómez
Affiliation:
Instituto de Física & CINQUIFIMA, Facultad de Ingeniería, Universidad de la República, Montevideo, Uruguay.
L. Campo
Affiliation:
Instituto de Física & CINQUIFIMA, Facultad de Ingeniería, Universidad de la República, Montevideo, Uruguay.
L. I. Amy
Affiliation:
Instituto de Física & CINQUIFIMA, Facultad de Ingeniería, Universidad de la República, Montevideo, Uruguay.
F. Martín
Affiliation:
Lab. de Materiales y Superficies (Unidad Asociada al CSIC), Dptos. de Física Aplicada & Ingeniería Química, Universidad de Málaga, Campus de Teatinos s/n, E29071 Málaga, Spain.
D. Leinen
Affiliation:
Lab. de Materiales y Superficies (Unidad Asociada al CSIC), Dptos. de Física Aplicada & Ingeniería Química, Universidad de Málaga, Campus de Teatinos s/n, E29071 Málaga, Spain.
J. R. Ramos-Barrado
Affiliation:
Lab. de Materiales y Superficies (Unidad Asociada al CSIC), Dptos. de Física Aplicada & Ingeniería Química, Universidad de Málaga, Campus de Teatinos s/n, E29071 Málaga, Spain.
E. A. Dalchiele
Affiliation:
Instituto de Física & CINQUIFIMA, Facultad de Ingeniería, Universidad de la República, Montevideo, Uruguay.
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Abstract

Optical properties of ZnO-CdTe electrochemically prepared on a core-shell nanostructure (NS) were studied. Numerical simulations based on effective medium approximation give higher absorption than ZnO-CdS samples and a sensitive dependence on CdTe content. The absorption edges for deep black samples found by transmittance (T(λ)) and diffuse reflectance (R diff (λ)) measurements were at 1.33eV and 1.55eV, respectively. A split-off band edge was also found by R diff (λ) at ∼2.5eV. The red shift observed in T(λ), previously observed in ZnO-CdS, and may confirm the enhancement of sub-bandgap absorption due to the NS nature of samples.

Keywords

photovoltaicnanostructureelectrodeposition

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Articles
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MRS Online Proceedings Library (OPL) , Volume 1707: Symposium UU – Semiconductor Nanowires—Synthesis, Properties and Applications , 2014 , mrss14-1707-uu06-10
Copyright
Copyright © Materials Research Society 2014 

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