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Photoluminescence of CdTe nanocrystals grown by pulsed laser ablation on a template of Si nanoparticles

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Abstract

CdTe nanocrystals were grown on eroded Si (111) substrates at room temperature by pulsed laser ablation. Before growth, Si substrates were subjected to different erosion time in order to investigate the effect on the CdTe samples. The erosion process consists of exposition to a pulsed high-voltage electric arc. The surface consequence of the erosion process consists of Si nanoparticles which acted as a template for the growth of CdTe nanocrystals. CdTe samples were studied by X-ray diffraction (XRD), room temperature photoluminescence (RT PL) and high-resolution transmission electron microscopy (HRTEM). CdTe nanocrystals grew in the stable cubic phase, according to XRD spectra. A strong visible emission was detected in photoluminescence (PL) experiments. The PL signal was centered at 540 nm (~2.34 eV). With the effective mass approximation, the size of the CdTe crystals was estimated around 3.5 nm. HRTEM images corroborated the physical characteristics of CdTe nanocrystals. These results could be useful for the development of CdTe optoelectronic devices.

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Acknowledgments

The authors acknowledge the technical support of Marcela Guerrero from CINVESTAV-IPN and the partial support by CONACyT-México.

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Authors and Affiliations

  1. Physics Department, CINVESTAV-IPN, Apdo. Postal 14-740, 07360, Mexico, Mexico

    A. Guillén-Cervantes, H. Silva-López, M. Becerril-Silva, J. S. Arias-Cerón, E. Campos-González & O. Zelaya-Ángel

  2. Escuela Superior de Física y Matemáticas del IPN, 07738, Mexico, Mexico

    A. C. Medina-Torres

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  1. A. Guillén-Cervantes
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  2. H. Silva-López
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  3. M. Becerril-Silva
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  4. J. S. Arias-Cerón
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  5. E. Campos-González
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  6. A. C. Medina-Torres
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  7. O. Zelaya-Ángel
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Correspondence to H. Silva-López.

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Guillén-Cervantes, A., Silva-López, H., Becerril-Silva, M. et al. Photoluminescence of CdTe nanocrystals grown by pulsed laser ablation on a template of Si nanoparticles. Appl. Phys. A 118, 1039–1042 (2015). https://doi.org/10.1007/s00339-014-8866-5

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  • DOI: https://doi.org/10.1007/s00339-014-8866-5

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