Comprehensive validation of Carrier Collection Efficiency in multiple quantum well solar cells: For more effective and direct evaluation of carrier transport dynamics
Comprehensive validation of Carrier Collection Efficiency in multiple quantum well solar cells: For more effective and direct evaluation of carrier transport dynamics
复制标题
多量子阱太阳能电池中载流子收集效率的综合验证：更有效、更直接地评估载流子传输动力学
DOI：
10.1109/pvsc.2013.6744146
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Y. Nakano
中科院分区：
文献类型：
--
作者：
H. Fujii;K. Toprasertpong;Kentaroh Watanabe;M. Sugiyama;Y. Nakano
载流子收集效率（CCE）是量子纳米结构太阳能电池中载流子输运的有效评价指标。可以通过将照明引起的电流增强归一化到其在反向偏置下的饱和值来估计CCE。通过研究光吸收的偏压依赖性，并研究在反向偏压下吸收的光子和收集的载流子之间的平衡，实验验证了CCE的推导过程。还研究了AM 1.5偏压照明对CCE表征的影响，发现其对于在阳光下实际器件操作期间更准确地评估载流子动力学非常重要。
Carrier Collection Efficiency (CCE) is proposed as an effective evaluation measure of carrier transport in quantum nanostructure solar cells. CCE can be estimated by normalizing the illumination-induced current enhancement to its saturation value at reverse bias. The derivation procedure of CCE is experimentally validated by examining the bias-dependency of light absorption, and investigating the balance between the absorbed photons and collected carriers at reverse bias. The effect of AM1.5 bias-illumination for CCE characterization was also studied, and found to be much significant for more accurate evaluation of carrier dynamics during actual device operation under sunlight.