Infrared radiation induced by photocarrier recombination in solar cells
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School of Mechatronics Engineering,Harbin Institute of Technology,Harbin,;PRChina;Center for Advanced Diffusion Wave Technologies CADIFT,Mechanical and Industrial Engineering,University of Toronto,Toronto,Ontario MS G,Canada,School of Mechatronics Engineering,Harbin Institute of Technology,Harbin,School of Mechatronics Engineering,Harbin Institute of Technology,Harbin,School of Mechatronics Engineering,Harbin Institute of Technology,Harbin,Center for Advanced Diffusion Wave Technologies CADIFT,Mechanical and Industrial Engineering,University of Toronto,Toronto,Ontario MS G,Canada

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    Abstract:

    In silicon solar cells, carriers are generated under illumination of laser, and excess minority carriers emit infrared radiation via a radiative recombination process. A model for minority carrier density in a pn junction induced by modulated laser was developed based on 1D carrier transport equation of semiconductor. The influences of carrier lifetime, diffusion coefficient, surface recombination rate, and photovoltage on radiation recombination, thus on infrared radiation were investigated. The laser-induced photocarrier radiometry signal was monitored using an InGaAs detector (0.9~1.7μm). The amplitude and phase of infrared radiation were obtained by a digital lock-in amplifier. Carrier transport parameters of m-Si solar cell were obtained by frequency-scanning experiments.

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LIU Jun-Yan, QIN Lei, GONG Jin-Long, WANG Yang, Mandelis A. Infrared radiation induced by photocarrier recombination in solar cells[J]. Journal of Infrared and Millimeter Waves,2014,33(3):248~255

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History
  • Received:April 18,2013
  • Revised:June 14,2013
  • Adopted:June 17,2013
  • Online: July 30,2014
  • Published: