Impact of Tortuosity on Charge-Carrier Transport in Organic Bulk Heterojunction Blends
Impact of Tortuosity on Charge-Carrier Transport in Organic Bulk Heterojunction Blends
复制标题
弯曲度对有机本体异质结混合物中电荷载流子传输的影响
DOI:
10.1103/physrevapplied.8.054043
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发表时间:
2017
影响因子:
4.6
通讯作者:
T.-Q. Nguyen
中科院分区:
文献类型:
--
作者:
M. C. Heiber;K. Kister;A. Baumann;V. Dyakonov;C. Deibel;T.-Q. Nguyen
The impact of the tortuosity of the charge-transport pathways through a bulk heterojunction film on the charge-carrier mobility is theoretically investigated using model morphologies and kinetic Monte Carlo simulations. The tortuosity descriptor provides a quantitative metric to characterize the quality of the charge-transport pathways, and model morphologies with controlled domain size and tortuosity are created using an anisotropic domain growth procedure. The tortuosity is found to be dependent on the anisotropy of the domain structure and is highly tunable. Time-of-flight charge-transport simulations on morphologies with a range of tortuosity values reveal that tortuosity can significantly reduce the magnitude of the mobility and the electric-field dependence relative to a neat material. These reductions are found to be further controlled by the energetic disorder and temperature. Most significantly, the sensitivity of the electric-field dependence to the tortuosity can explain the different experimental relationships previously reported, and exploiting this sensitivity could lead to simpler methods for characterizing and optimizing charge transport in organic solar cells.
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影响因子:
3.2
作者:
Lorrmann, Jens;Ruf, Manuel;Deibel, Carsten
通讯作者:
Deibel, Carsten
影响因子:
27.8
作者:
Foster, Samuel;Deledalle, Florent;Nelson, Jenny
通讯作者:
Nelson, Jenny
影响因子:
8.6
作者:
Heiber, Michael C.;Baumbach, Christoph;Deibel, Carsten
通讯作者:
Deibel, Carsten
DOI:
10.1103/physrevb.52.939
发表时间:
1995
期刊:
Physical review. B, Condensed matter
影响因子:
--
作者:
Dunlap
通讯作者:
Dunlap
影响因子:
3.7
作者:
Michael C. Heiber;Klaus Kister
通讯作者:
Klaus Kister