The effect of SiO2 on TiO2 up-conversion photoluminescence film |
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| Affiliation: | 1. Department of Physics and Center for Marine-Integrated Biomedical Technology, Pukyong National University, Busan 608-737, Republic of Korea;2. Department of Electronic Engineering, Pukyong National University, Busan 608-737, Republic of Korea;1. Instituto de Física, Universidade Federal de Uberlândia. CP 593, 38400-902 Uberlândia, MG, Brazil;2. Universidade de São Paulo-USP, Av. Trabalhador São Carlense, CEP13560-970 São Carlos, SP, Brazil;3. CIMAP – UMR 6252 CEA-CNRS-ENSICAEN-Université de Caen, 6 boulevard du Maréchal Juin, 14050 CAEN Cedex 4, France;1. Instituto de Fisica, Universidade Federal de Uberlandia, CEP38408-902 Uberlandia, Minas Gerais, Brazil;2. CIMAP – Centre de recherche sur les Ions, les Matériaux et la Photonique UMR 6252 CEA-CNRS-ENSICAEN-Université de Caen, 14050 CAEN Cedex 4, France;3. Instituto de Física de São Carlos, Universidade de São Paulo, USP, CEP 13560-970 São Carlos, SP, Brazil;1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;1. Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024, Shanxi, PR China;2. Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, Shanxi, PR China;3. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, PR China;4. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, PR China;1. School of Materials Sciences and Technology, China University of Geosciences, Beijing 100083, China;2. School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | In order to increase the photoelectric conversion efficiency of silicon solar cell, the up-conversion film has been tried to enhance the response of the solar cells to the infrared band. Yb3+, Er3+ co-doped SiO2/TiO2 composite films with different Ti/Si molar ratio were deposited on the glass substrate with sol–gel method and spin-coating technique. The effect of different molar ratio of Ti/Si on the film’s morphology and optical properties was investigated. The morphology, the absorption spectra and photoluminescence (PL) spectra of the film were tested and analyzed. After the film was annealed at 900 °C, the XRD diffraction pattern indicated that rare earths ions have evenly dispersed into the matrix lattice. The FT-IR showed that Si ions entered into the lattice of titanium dioxide, and the Ti–O–Si bonds came into being. When the film pumped with a laser of 980 nm, there were a dominant red emission and several weak green peaks. In addition, with the increase of the mole ratio of Si/Ti, the intensity of the film’s up-conversion luminescence increases at first and then decreases. When the molar ratio of Si/Ti is 1/8, the sample had the highest intensity of up-conversion luminescence. |
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| Keywords: | Photoluminescence Up-conversion Rare earth Sol–gel |
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