Characterization of quantum dot enhanced solar cells for concentrator photovoltaics
Characterization of quantum dot enhanced solar cells for concentrator photovoltaics
复制标题
用于聚光光伏发电的量子点增强太阳能电池的表征
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
R. Raffaelle
中科院分区：
文献类型：
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作者：
S. Hubbard;C. Bailey;Ryne Aguinaldo;S. Polly;D. Forbes;R. Raffaelle
向太阳能电池添加量子点（QD）或量子威尔斯（QW）允许扩展太阳能电池的吸收光谱以匹配聚光下的光谱条件。本文研究了量子点的带隙调谐效应。制备了具有和不具有插入到i区中的InAs QD超晶格（SL）的P-i-nGaAs聚光太阳能电池。为了研究InAs QD层增加的影响，生长了5至20个堆叠的InAs QD。20层堆叠QD调谐电池显示与来自2-450个太阳的浓度的基线相比JSC改善11%。QD器件的Jsc增加被证明是由QD贡献的光生电流的直接结果。与基线太阳能电池相比，在400太阳强度下，20 X QD电池给出了1%的绝对效率提高，显示出在太阳能集中下QD光谱调谐的潜力。
The addition of quantum dots (QDs) or quantum wells (QW) to a solar cell allows one to extend the absorption spectrum of the solar cell to match spectral conditions under concentration. In this paper the effect of bandgap tuning using quantum dots is investigated. P-i-n GaAs concentrator solar cells, both with and without InAs QD superlattice (SL) inserted into the i-region, were fabricated. In order to investigate effects of increased InAs QD layers, between 5 and 20 stacked InAs QDs were grown. The 20 layer stack QD tuned cell showed an 11% improvement in JSC compared to the baseline from concentrations of 2–450 suns. The increased Jsc of the QD devices was shown to be a direct result of photo-generated current contributed by the QDs. The 20X QD cell gave a 1% absolute efficiency enhancement, compared to a baseline solar cell, at 400 sun intensity, showing potential for QD spectral tuning under solar concentration.