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Journal of Nanomaterials
Volume 2013 (2013), Article ID 587036, 6 pages
http://dx.doi.org/10.1155/2013/587036
Research Article

Broadband Near-Infrared Quantum Cutting in Metal-Ion Codoped Y3Al5O12 Thin Films Grown by Pulsed-Laser Deposition for Solar Cell Application

Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong

Received 21 February 2013; Accepted 6 March 2013

Academic Editor: Feng Yan

Copyright © 2013 Mei Kwan Lau and Jianhua Hao. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We have deposited thin films of yttrium aluminum garnet (YAG) doped with Ce3+ and Yb3+ on quartz and silicon substrates by pulsed laser deposition. Near-infrared (NIR) quantum cutting which involves the emission of NIR photons through the downconversion from Ce3+ to Yb3+ is realized. Upon the broadband excitation of Ce3+ ions with a visible photon at the peak wavelength of 450 nm, NIR photons are generated by Yb3+ ions, with an emission wavelength centered at 1030 nm. The luminescent decay curves of Ce3+ were recorded as a supporting evidence corresponding to the energy transfer. This work offers a better and more convenient approach compatible with crystalline silicon solar cell compared to conventional bulk phosphors.