Characterization of Photocurrent Generation Dynamics in Polymer Solar Cells Based on ZnO/CdS-Core/Shell Nanoarrays by Intensity Modulated Photocurrent Spectroscopy: Theoretical Modeling
Characterization of Photocurrent Generation Dynamics in Polymer Solar Cells Based on ZnO/CdS-Core/Shell Nanoarrays by Intensity Modulated Photocurrent Spectroscopy: Theoretical Modeling
复制标题
通过强度调制光电流光谱表征基于 ZnO/CdS 核/壳纳米阵列的聚合物太阳能电池中的光电流产生动力学：理论模型
DOI：
10.1021/jp509369n
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发表时间：
2014-11
期刊：
影响因子：
--
通讯作者：
Mingtai Wang
中科院分区：
文献类型：
--
作者：
Zeliang Qiu;Wenjin Yue;Xun Zhou;Mingtai Wang
建立了基于ZnO/ cds -核/壳纳米棒阵列（ZC-NAs）的混合聚合物基太阳能电池（HPSCs）的强度调制光电流光谱（IMPS）动态表征理论模型。该模型描述了CdS壳层形成对电荷产生和输运动力学的影响。特别是，建立了纳米阵列太阳能电池中无效聚合物相模型的解析表达式，并首次将其引入到IMPS模型中。在CdS壳厚(L)为3 ~ 8 nm的聚合物/ZC-NA电池的实验数据证实了IMPS模型的主要预期。结果表明，CdS吸收（f1）和聚合物吸收（f2）对电荷产生的贡献是由核/壳纳米阵列结构和聚合物的固有性质决定的，而CdS的最佳壳层厚度（Lopt）取决于ZnO核心纳米棒之间的间距和聚合物的激子扩散长度。光电流g…
A theoretical model is developed for the dynamic characterization of hybrid polymer-based solar cells (HPSCs) based on vertically aligned ZnO/CdS-core/shell nanorod arrays (ZC-NAs) by intensity modulated photocurrent spectroscopy (IMPS). The model describes the effects of CdS shell formation on charge generation and transport dynamics. Particularly, an analytical expression for the ineffective polymer phase model in nanoarray solar cells is developed and introduced into IMPS model for the first time. The main expectations of the IMPS model are confirmed by the experimental data of the polymer/ZC-NA cells with the CdS shell thickness (L) of 3–8 nm. It is shown that the contributions from CdS absorption (f1) and polymer absorption (f2) to charge generation are determined by the core/shell nanoarray structure and the intrinsic polymer property, while the optimal CdS shell thickness (Lopt) depends on the interspacing between ZnO core nanorods and the exciton diffusion length of the polymer. The photocurrent g...
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