※ 引述《gauss760220 (章魚)》之銘言： : 請問一下 : 半導體的bandgap跟溫度有何關係? : 在做非晶矽太陽能電池模擬時 : 會用到一條公式: : 根號(吸收係數*光子能量)=B(光子能量-optical bandgap) : 將"根號(吸收係數*光子能量)"對"光子能量"做圖 與光子能量軸的截距即為optical : bandgap : 不過溫度上升時 : optical bandgap卻一直變小(截距變小) : 翻了半導體物理的書也沒有寫(也許有 但真的沒查到= =) : 不知是否可給一些意見? : 謝謝 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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