Conjugated-Backbone Effect of Organic Small Molecules for n-Type Thermoelectric Materials with ZT over 0.2
文献类型：期刊论文
| 作者 | Huang, Dazhen1,2; Yao, Huiying3; Cui, Yutao1,2; Zou, Ye1; Zhang, Fengjiao4; Wang, Chao1,2; Shen, Hongguang1,2; Jin, Wenlong1,2; Zhu, Jia3; Diao, Ying4 |
| 刊名 | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
 |
| 出版日期 | 2017-09-20 |
| 卷号 | 139期号:37页码:13013-13023 |
| 英文摘要 | Conjugated backbones play a fundamental role in determining the electronic properties of organic semiconductors. On the basis of two solution-processable dihydropyrrolo[3,4-c]pyrrole-1,4-diylidenebis(thieno[3,2-b]thiophene) derivatives with aromatic and quinoid structures, we have carried out a systematic study of the relationship between the conjugated-backbone structure and the thermoelectric properties. In particular, a combination of UV-vis-NIR spectra, photoemission spectroscopy, and doping optimization are utilized to probe the interplay between energy levels, chemical doping, and thermoelectric performance. We found that a moderate change in the conjugated backbone leads to varied doping mechanisms and contributes to dramatic changes in the thermoelectric performance. Notably, the chemically doped A-DCV-DPPTT, a small molecule with aromatic structure, exhibits an electrical conductivity of 5.3 S cm(-1) and a high power factor (PF373 (K)) up to 236 mu W m(-1) K-2, which is 50 times higher than that of Q-DCM-DPPTT with a quinoid structure. More importantly, the low thermal conductivity enables A-DCV-DPPTT to possess a figure of merit (ZT) of 0.23 +/- 0.03, which is the highest value reported to date for thermoelectric materials based on organic small molecules. These results demonstrate that the modulation of the conjugated backbone represents a powerful strategy for tuning the electronic structure and mobility of organic semiconductors toward a maximum thermoelectric performance. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/41115]  |
| 专题 | 化学研究所_有机固体实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, CAS Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Beijing Normal Univ, Dept Chem, Beijing 100875, Peoples R China 4.Univ Illinois, Dept Chem & Biomol Engn, 600 S Mathews Ave, Urbana, IL 61801 USA |
| 推荐引用方式 GB/T 7714 | Huang, Dazhen,Yao, Huiying,Cui, Yutao,et al. Conjugated-Backbone Effect of Organic Small Molecules for n-Type Thermoelectric Materials with ZT over 0.2[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2017,139(37):13013-13023. |
| APA | Huang, Dazhen.,Yao, Huiying.,Cui, Yutao.,Zou, Ye.,Zhang, Fengjiao.,...&Zhu, Daoben.(2017).Conjugated-Backbone Effect of Organic Small Molecules for n-Type Thermoelectric Materials with ZT over 0.2.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,139(37),13013-13023. |
| MLA | Huang, Dazhen,et al."Conjugated-Backbone Effect of Organic Small Molecules for n-Type Thermoelectric Materials with ZT over 0.2".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 139.37(2017):13013-13023. |
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来源：化学研究所
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