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首页> 外文会议>2016 Conference of Basic Sciences and Engineering Studies >Photon upconversion materials for photovoltaic efficiency enhancement: Energy gap optimization
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Photon upconversion materials for photovoltaic efficiency enhancement: Energy gap optimization

机译：用于提高光伏效率的光子上转换材料：能隙优化

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The photon upconversion materials shift the photon energy to an upper level in order to be absorbed by the photovoltaic material and thus increase the solar cell efficiency by increasing the number of absorbed photons. This paper modeled the efficiency of the upconversion process against different values for the energy gaps of the upconversion material in order to find the optimum energy gap distribution that gives the maximum efficiency. The material under test was the Hexagonal Sodium Yttrium Fluoride (β-NaYF4) doped with trivalent Erbium (Er3+). This material showed the highest results in many published upconversion experiments. The model was implemented using MATLAB™ software, it simulated the rate equations for the lowest six energy levels of the erbium ion. The results of the simulation showed that by changing the band gap the upconversion efficiency can increase from 14% to 35%. Changing the energy gap can be done using the "energy band engineering" processes.
机译：光子上转换材料将光子能量转移到更高的水平，以便被光伏材料吸收，从而通过增加吸收的光子数量来提高太阳能电池效率。本文针对上转换材料的能隙的不同值对上转换过程的效率进行了建模，以找到能够获得最大效率的最佳能隙分布。被测试的材料是掺有三价Er（Er3 +）的六边形氟化氟化钠（β-NaYF4）。该材料在许多已发表的上转换实验中显示出最高的结果。该模型是使用MATLAB™软件实现的，它模拟了six离子的最低六个能级的速率方程。仿真结果表明，通过改变带隙，上变频效率可以从14％提高到35％。可以使用“能带工程”过程来更改能隙。

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