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Near-infrared quantum cutting in Bi3+/Yb3+ co-doped oxyfluoride glasses via cooperative energy transfer for solar cells
Affiliation:1. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal, Universidad de Alicante, Apartado 99, E-03080 Alicante, Spain;2. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Universidad de Alicante, Apartado 99, E-03080 Alicante, Spain;3. Departamento de Óptica, Farmacología y Anatomía, Universidad de Alicante, Apartado 99, E-03080 Alicante, Spain;1. Applied Science College, Harbin University of Science and Technology, Harbin 150080, China;2. Department of Chemistry, Harbin Institute of Technology, Harbin 150001, China;1. Institute of Low Temperature and Structural Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroc?aw, Poland;1. Experimental Teaching Department, Guangdong University of Technology, Waihuan Xi Road, No.100, Guangzhou, 510006, PR China;2. School of Chemical Engineering and Light Industry, Guangdong University of Technology, Waihuan Xi Road, No.100, Guangzhou, 510006, PR China;3. Basic Teaching Department, Guangzhou Maritime University, Hongshan Three Road, No. 101, Guangzhou, 510725, PR China;4. School of Environmental Science and Engineering, Guangdong University of Technology, Waihuan Xi Road, No.100, Guangzhou, 510006, PR China;5. School of Materials and Energy, Guangdong University of Technology, Waihuan Xi Road, No.100, Guangzhou, 510006, PR China;1. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar 522 510, A.P., India;2. Department of Physics, University College of Engineering and Technology, Acharya Nagarjuna University, Nagarjuna Nagar 522 510, A.P., India;3. Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warszawa, Poland;4. Institute of Physics, J. Dlugosz University, Ul. Armii Krajowej 13/15, 42-201 Czestochowa, Poland;5. College of Sciences, Chongqing University of Posts and Telecommunications, Chongqing 400065, People’s Republic of China;6. Institute of Physics, University of Tartu, W. Ostwald Str. 1, Tartu 50411, Estonia;7. Institute of Physics, Kazimierz Wielki University, Weyssenhoffa 11, 85-072 Bydgoszcz, Poland
Abstract:The Bi3+/Yb3+ ion co-doped 55SiO2–20Al2O3–5Na2CO3–20CaF2 glasses are synthesized successfully by a conventional melting-quenching method. High efficient quantum cutting involving the emission of two near-infrared photons for one ultraviolet photon absorbed is realized in the oxyfluoride glasses co-doped with Bi3+ and Yb3+. An intense characteristic near-infrared emission around 977 nm of Yb3+:2F5/2  2F7/2 transition is obtained when the 303 nm is as excitation wavelength to induce the 1S0  3P1 transition of Bi3+. The maximum quantum efficiency of our glasses is estimated to be 164.3%. The energy transfer mechanism is proposed to be a cooperative energy transfer via second-order down-conversion process. The glasses could be a potential quantum cutting converter to improve the photovoltaic energy conversion efficiency of crystalline Si solar cells via spectrum modification.
Keywords:Quantum cutting  Second-order down-conversion  Oxyfluoride glasses  Solar cells
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