The Optical And Electrical Properties Of Eu3+-Y3+codoped ITO Transparent Conductive Electrodes As Luminescent Solar Concentrators
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C.-C. Ting & C.-H. Tsai
Rare earth ions (Eu3+) and Y3+ ions were codoped into the tin-doped indium oxide (ITO) transparent conductive electrode to make it possess visible luminescent properties. The Eu3+-Y3+codoped transparent conductive thin films with the precise control on the desired stoichiometry of dopants were fabricated by sol-gel spin-coating technologies. We first report that the Eu3+-Y3+codoped ITO thin films show better visible luminescent properties than Eu3+-doped ITO thin films. The higher Y3+ concentration can increase the 611 nm PL intensity of Eu3+-Y3+ codoped ITO thin films. However, the Eu3+ and Y3+ codoping concentrations should be controlled within 0.1% and 0.5%, respectively, to avoid the deterioration of conductivity. We believe that the Eu3+-Y3+codoped ITO thin films can play dual roles as the luminescent solar concentrators and transparent conductive electrode to enhance the efficiency of solar cells. Keywords: ITO, europium, yttrium, pyrocholre, photoluminescence.
ITO, europium, yttrium, pyrocholre, photoluminescence