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Based on the spectrum of rare earth doped materials under conversion and Its Application

Author: XuShuYan
Tutor: JiangChun
School: Shanghai Jiaotong University
Course: Electronics and Communication Engineering
Keywords: Solar Rare earth doped materials Down conversion Energy transfer Theoretical model Simulation
CLC: TM914.4
Type: Master's thesis
Year: 2012
Downloads: 138
Quote: 0
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Abstract


The use of photovoltaic solar cells convert light energy into electrical energy effects of the photovoltaic device. The photoelectric conversion of the solar cell, the light and the bandgap energy of the battery may cause some detuning energy loss, limiting the conversion efficiency of the solar cell. Spectral conversion is to reduce energy loss such an effective way. The role of a high energy conversion converting photons into two or more low-energy photons, solar cells can improve the utilization of high-energy photons. With fluorescent properties of rare earth doped material, which is commonly used in the spectral conversion material. Conversion based on rare-earth-doped materials under study for improving the conversion efficiency of solar cells has a very important significance. This paper studies the rare earth ion doped materials spectral down-conversion function, and its application in solar cells, to discuss the next conversion output of the battery performance. Therefore, this research work in general can be divided into two parts, the first part is the spectrum of rare earth ions doped systems modeling and simulation of down-conversion, and the second part is the solar cell performance simulation, belongs to the first part of the study of the specific application . Papers main work includes: 1. Studied Ce 3 -Yb 3 ion doped glass system spectral down-conversion by analyzing Ce 3 ions and Yb 3 process of energy transfer between ions, was established to describe the theoretical numerical model of the process. For quantitative analysis of both rare-earth-doped conversion efficiency of the system, the definition of power conversion efficiency, the quantum efficiency of photon conversion efficiency and three variables. (2) The above values ??using MATLAB simulation model. Papers selected certain initial parameter settings, and select the appropriate method of calculating the theoretical model for the simulation down conversion solution. By analyzing simulation results we, Ce 3 -Yb 3 ion doped glass system can efficiently convert high-energy photons absorbed by the solar cells suitable for low-energy photons. 3 using a solar spectrum and the spectrum after the conversion as the excitation spectra for the simulation of the solar cell. This section is divided into two areas: First, through PC1D simulation software, and the other is based on the existing basic physics equations, using MATLAB programming for solving equations for simulation. Comparative analysis of simulation results and found that the excitation spectrum of the next conversion, the solar cell short-circuit current, open circuit voltage conversion efficiency has improved to some extent.

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CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Photocell > Solar cells
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