※ 引述《gauss760220 (章鱼)》之铭言： : 请问一下 : 半导体的bandgap跟温度有何关系? : 在做非晶矽太阳能电池模拟时 : 会用到一条公式: : 根号(吸收系数*光子能量)=B(光子能量-optical bandgap) : 将"根号(吸收系数*光子能量)"对"光子能量"做图 与光子能量轴的截距即为optical : bandgap : 不过温度上升时 : optical bandgap却一直变小(截距变小) : 翻了半导体物理的书也没有写(也许有 但真的没查到= =) : 不知是否可给一些意见? : 谢谢 Since the operating temperature of solar cells in the field can vary over wide extremes, it is necessary to understand the effect of temperature on performance. The Isc of solar cells is not strongly temperature-dependant.Increased temperature reduces the Eg and increases the IL, since lower energy photons can be absorbed. However, the other cell parameters, the Voc and the FF, both decrease. Qualitatively, as temperature is increased, the population of electron, ni, increase exponentially, increasing the dark saturation current I0. The increased dark current reduces Voc. The dominant variation is that of Voc. This causes the power output and efficiency to decrease with increasing temperature. --

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