Quantum dot solar cells
Quantum dot solar cells
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DOI：
10.1016/s1386-9477(02)00374-0
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发表时间：
2002-04-01
影响因子：
3.3
通讯作者：
Nozik, AJ
中科院分区：
文献类型：
--
作者：
Nozik, AJ
量子点（QD）太阳能电池具有通过利用热的光生载流子来产生更高的光电压或更高的光电流而将太阳光子转换的最大可达到的热力学转换效率提高高达约66%的潜力。前一种效应是基于量子点阵列光电极中的热载流子在通过声子发射弛豫到能带边缘之前的能带输运和收集。后一种效应是基于利用量子点太阳能电池中的热载流子通过增强的碰撞电离过程产生和收集额外的电子-空穴对。描述了三种QD太阳能电池配置：（1）包括QD阵列的光电极，（2）QD敏化的纳米晶TiO（2），和（3）分散在电子和空穴传导聚合物的共混物中的QD。这些高效率的配置需要缓慢的热载流子冷却时间，我们讨论了在InP量子点减缓热电子冷却的初步结果。(C)2002 Elsevier Science B. V.保留所有权利。
Quantum dot (QD) solar cells have the potential to increase the maximum attainable thermodynamic conversion efficiency of solar photon conversion up to about 66% by utilizing hot photogenerated carriers to produce higher photovoltages or higher photocurrents. The former effect is based on miniband transport and collection of hot carriers in QD array photoelectrodes before they relax to the band edges through phonon emission. The latter effect is based on utilizing hot carriers in QD solar cells to generate and collect additional electron-hole pairs through enhanced impact ionization processes. Three QD solar cell configurations are described: (1) photoelectrodes comprising QD arrays, (2) QD-sensitized nanocrystalline TiO(2), and (3) QDs dispersed in a blend of electron- and hole-conducting polymers. These high-efficiency configurations require slow hot carrier cooling times, and we discuss initial results on slowed hot electron cooling in InP QDs. (C) 2002 Elsevier Science B.V. All rights reserved.