Unravelling Doping Effects on PEDOT at the Molecular Level: From Geometry to Thermoelectric Transport Properties
文献类型：期刊论文
| 作者 | Shi, Wen1; Zhao, Tianqi1; Xi, Jinyang1; Wang, Dong1; Shuai, Zhigang1,2,3 |
| 刊名 | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
 |
| 出版日期 | 2015-10-14 |
| 卷号 | 137期号:40页码:12929-12938 |
| 英文摘要 | Tuning carrier concentration via chemical doping is the most successful strategy to optimize the thermoelectric figure of merit. Nevertheless, how the dopants affect charge transport is not completely understood. Here we unravel the doping effects by explicitly including the scattering of charge carriers with dopants on thermoelectric properties of poly(3,4-ethylenedioxythiophene), PEDOT, which is a p-type thermoelectric material with the highest figure of merit reported. We corroborate that the PEDOT exhibits a distinct transition from the aromatic to quinoid-like structure of backbone, and a semiconductor-to-metal transition with an increase in the level of doping. We identify a close-to-unity charge transfer from PEDOT to the dopant, and find that the ionized impurity scattering dominates over the acoustic phonon scattering in the doped PEDOT. By incorporating both scattering mechanisms, the doped PEDOT exhibits mobility, Seebeck coefficient and power factors in very good agreement with the experimental data, and the lightly doped PEDOT exhibits thermoelectric properties superior to the heavily doped one. We reveal that the thermoelectric transport is highly anisotropic in ordered crystals, and suggest to utilize large power factors in the direction of polymer backbone and low lattice thermal conductivity in the stacking and lamellar directions, which is viable in chain-oriented amorphous nanofibers. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2016-05-09 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/28918]  |
| 专题 | 化学研究所_有机固体实验室 |
| 作者单位 | 1.Tsinghua Univ, Dept Chem, MOE Key Lab Organ OptoElect & Mol Engn, Beijing 100084, Peoples R China 2.Chinese Acad Sci, Inst Chem, BNLMS, Key Lab Organ Solids, Beijing 100190, Peoples R China 3.Xiamen Univ, Collaborat Innovat Ctr Chem Energy Mat, Xiamen 351005, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shi, Wen,Zhao, Tianqi,Xi, Jinyang,et al. Unravelling Doping Effects on PEDOT at the Molecular Level: From Geometry to Thermoelectric Transport Properties[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2015,137(40):12929-12938. |
| APA | Shi, Wen,Zhao, Tianqi,Xi, Jinyang,Wang, Dong,&Shuai, Zhigang.(2015).Unravelling Doping Effects on PEDOT at the Molecular Level: From Geometry to Thermoelectric Transport Properties.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,137(40),12929-12938. |
| MLA | Shi, Wen,et al."Unravelling Doping Effects on PEDOT at the Molecular Level: From Geometry to Thermoelectric Transport Properties".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 137.40(2015):12929-12938. |
入库方式： OAI收割
来源：化学研究所
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