Abstract
Light-emitting CdSe quantum dot (QD) — ZnO nanorod (NR) hybrid structures were fabricated via wet chemical methods. Structural investigations indicated that the nano-sized CdSe QDs were formed on the ZnO NRs. Optical investigations showed that the energy band gap of the CdSe QDs was changed by varying the number of deposition cycles of CdSe due to the quantum confinement effect. The emissions from the hybrid structures depended on the existence of an Al2O3 shell layer on the ZnO NRs, which acted as an electrical barrier layer blocking charge carrier losses from the CdSe QDs to the ZnO NRs.
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Refrerences
C. M. Lieber and Z. L. Wang, MRS Bull. 32, 99 (2007).
L. S. Dang et al., J. Korean Phys. Soc. 42, S657 (2003).
J. H. Bang and P. V. Kamat, Adv. Funct. Mater. 20, 1970 (2010).
K. S. Leschkies, R. Divakar, J. Basu, E. E. Pommer, J. E. Boercker, C. B. Carter, U. R. Kortshagen, D. J. Norris and E. S. Aydil, Nano Lett. 7, 1793 (2007).
Z. Chen, N. Zhang and Y.-J. Xu, Cryst. Eng. Comm. 15, 3022 (2013).
R. S. Aga Jr., D. Jowhar, A. Ueda, Z. Pan, W. E. Collins, R. Mu, K. D. Singer and J. Shen, Appl. Phys. Lett. 91, 232108 (2007).
I. K. Park and S. J. Park, J. Korean Phys. Soc. 56, 1828 (2010).
R. J. Ellingson, M. C. Beard, J. C. Johnson, P. R. Yu, O. I. Micic, A. J. Nozik, A. Shabaev and A. L. Efros, Nano Lett. 5, 865 (2005).
Z. L. Wang and J. Song, Science 312, 242 (2006).
Y.-S. Lee, Y. I. Jung, B. Y. Noh and I. K. Park, Appl. Phys. Express 4,112101 (2011).
J. I. Sohn, Y. I. Jung, S. H. Baek, S. N. Cha, J. E. Jang, C. H. Cho, J. H. Kim, J. M. Kim and I. K. Park, Nanoscale 6, 2046 (2014).
K. K. Kim, S. D. Lee, H. Kim, J. C. Park, S. N. Lee, Y. Park, S. J. Park and S. W. Kim, Appl. Phys. Lett. 94, 071118 (2009).
K. S. Kim, S. M. Kim, H. Jeong, M. S. Jeong and G. Y. Jung, Adv. Func. Mater. 20, 1076 (2010).
Y. I. Jung, B. Y. Noh, Y. S. Lee, S. H. Baek, J. H. Kim and I. K. Park, Nanoscale Res. Lett. 7, 43 (2012).
B. H. Kong, M. K. Choi, H. K. Cho, J. H. Kim, S. Baek and J. H. Lee, Electrochem. Solid-State Lett. 13, K12 (2010).
N. Chouhan, C. L. Yeh, S. F. Hu, J. H. Huang, C. W. Tsai, R. S. Liu, W. S. Chang and K. H. Chen, J. Electrochem. Soc. 157, B1430 (2010).
Y. Kayanuma, Phys. Rev. B 38, 9797 (1988).
D. R. Lide, CRC Handbook of Chemistry and Physics (CRC, Boca Raton, 2009).
A. I. Ekimov, F. Hache, M. C. Schanneklein, D. Ricard, C. Flytzanis, I. A. Kudryavtsev, T. V. Yazeva, A. V. Rodina and A. L. Efros, J. Opt. Soc. Am. B 10, 100 (1993).
J. S. Kim, B. S. Ko, J. I. Yu and I. H. Bae, J. Kor Phys. Soc. 55, 640 (2009).
K. B. Sundaram and A. Khan, J. Vac. Sci. Tech. A 15, 428 (1997).
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Kim, YS., Noh, BY. & Park, IK. Light emission from CdSe quantum dot and ZnO nanorod hybrid structures. Journal of the Korean Physical Society 65, 74–79 (2014). https://doi.org/10.3938/jkps.65.74
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DOI: https://doi.org/10.3938/jkps.65.74