Strong upconversion luminescence in LiYMo2O8:Er,Yb towards efficiency enhancement of dye-sensitized solar cells |
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| Affiliation: | 1. The Key Laboratory of Photonic Devices and Materials, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;3. Department of Physics, University of Science and Technology of China, Hefei 230026, PR China;1. Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil;2. Pontifícia Universidade Católica do Rio de Janeiro, Departamento de Química, Rio de Janeiro, RJ, Brazil;3. Centro de Química e Meio Ambiente, Instituto de Pesquisas Energéticas e Nucleares, São Paulo, SP, Brazil;4. Department of Chemistry, University of Turku,FI-20014 Turku, Finland;5. Turku University Centre for Materials and Surfaces (MatSurf), Turku, Finland;6. Departamento de Química Fundamental, Universidade Federal de Pernambuco, Recife, PE, Brazil;1. INCTMN-UFSCar, Universidade Federal de São Carlos, P.O. Box 676, 13565-905, São Carlos, SP, Brazil;2. Instituto Federal do Maranhão, PPG em Engenharia de Materiais, 65030-005, São Luís, MA, Brazil;3. INCTMN-UNESP, Universidade Estadual Paulista, P.O. Box 355, CEP, 14801-907, Araraquara, SP, Brazil;1. College of Materials and Mineral Resources, Xi''an University of Architecture and Technology, Xi''an 710055, China;2. College of Metallurgical Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China;3. School of Science, Xi''an University of Architecture and Technology, Xi''an 710055, China;1. College of Chemistry and Materials Engineering, Bohai University, Jinzhou, Liaoning 121007, China;2. Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan;3. Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University, Shenyang, Liaoning 110819, China;4. Research Center for Advanced Ceramic Materials, School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning 110819, China;1. Departamento de Física, Universidade Federal do Ceará, P. O. Box 6030, CEP 60455-970, Fortaleza, CE, Brazil;2. Universidade Federal do Cariri, CEP 63000-000, Juazeiro do Norte, CE, Brazil;3. Laboratório de Microbiologia e Biologia Molecular, Universidade Regional do Cariri, CEP 63105-000, Crato, CE, Brazil;4. Departamento de Física, Campus Ministro Petrônio Portella, Universidade Federal do Piauí, CEP 64049-550, Teresina, PI, Brazil |
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| Abstract: | Strong green upconversion (UC) emissions induced by a 940 nm laser have been observed in a series of Er3+, Yb3+ co-doped LiYMo2O8 samples. The diffuse reflectance absorption spectra show that the co-doped samples can absorb the photons in the range of 900–1050 nm efficiently, demonstrating the excellent sensitization effect of Yb3+ ions. Based on power switched UC luminescence, UC mechanisms are discussed, and the emission spectra excited by 490 nm are also measured to give additional evidence. The results reveal that application of these phosphors may improve the conversion efficiency of DSSCs. |
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| Keywords: | Upconversion DSSCs UC mechanism |
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