Seebeck Effects in N-Type and P-Type Polymers Driven Simultaneously by Surface Polarization and Entropy Differences Based on Conductor/Polymer/Conductor Thin-Film Devices
文献类型：期刊论文
| 作者 | Hu, Dehua2; Liu, Qing2; Tisdale, Jeremy2; Lei, Ting3; Pei, Jian3; Wang, Hsin4; Urbas, Augustine5; Hu, Bin1,2 |
| 刊名 | acs nano
 |
| 出版日期 | 2015-05-01 |
| 卷号 | 9期号:5页码:5208-5213 |
| 关键词 | Seebeck effects charge-transfer states surface polarization entropy difference n-type organic polymer p-type organic polymer |
| 英文摘要 | this paper reports seebeck effects driven by both surface polarization difference and entropy difference by using photoinduced intramolecular charge-transfer states in n-type and p-type conjugated polymers, namely iidt and iiddt, respectively, based on vertical conductor/polymer/conductor thin-film devices. we obtain large seebeck coefficients of 898 mu v/k from n-type iidt and 1300 mu v/k from p-type iiddt when the charge-transfer states are generated by a white light illumination of 100 mw/cm(2), compared with the values of 380 and 4700 mu v/k in dark condition, respectively. simultaneously, the electrical conductivities are increased from almost insulating state in dark condition to conducting state under photoexcitation in both n-type iidt and p-type iiddt based devices. the large seebeck effects can be attributed to the following two mechanisms. first, the intramolecular charge-transfer states exhibit strong electron phonon coupling, which leads to a polarization difference between high and low temperature surfaces. this polarization difference essentially forms a temperature-dependent electric field, functioning as a new driving force additional to entropy difference, to drive the energetic carriers for the development of seebeck effects under a temperature difference. second, the intramolecular charge-transfer states generate negative or positive majority carriers (electrons or holes) in the n-type iidt or p-type iiddt, ready to be driven between high and low temperature surfaces for developing seebeck effects. on the basis of coexisted polarization difference and entropy difference, the intramolecular charge-transfer states can largely enhance the seebeck effects in both n-type iidt and p-type iiddt devices. furthermore, we find that changing electrical conductivity can switch the seebeck effects between polarization and entropy regimes when the charge-transfer states are generated upon applying photoexcitation. therefore, using intramolecular charge-transfer states presents an approach to develop thermoelectric effects in organic materials-based vertical conductor/polymer/conductor thin-film devices. |
| WOS标题词 | science & technology ; physical sciences ; technology |
| 类目[WOS] | chemistry, multidisciplinary ; chemistry, physical ; nanoscience & nanotechnology ; materials science, multidisciplinary |
| 研究领域[WOS] | chemistry ; science & technology - other topics ; materials science |
| 关键词[WOS] | enhancement ; density ; voltage ; states |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000355383000056 |
| 公开日期 | 2016-05-09 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/146291]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Beijing Jiaotong Univ, Coll Sci, Beijing 100044, Peoples R China 2.Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA 3.Peking Univ, Beijing Natl Lab Mol Sci, Key Lab Bioorgan Chem & Mol Engn, Minist Educ,Coll Chem & Mol Engn, Beijing 100871, Peoples R China 4.Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA 5.Air Force Res Lab, Wright Patterson AFB, OH 45433 USA |
| 推荐引用方式 GB/T 7714 | Hu, Dehua,Liu, Qing,Tisdale, Jeremy,et al. Seebeck Effects in N-Type and P-Type Polymers Driven Simultaneously by Surface Polarization and Entropy Differences Based on Conductor/Polymer/Conductor Thin-Film Devices[J]. acs nano,2015,9(5):5208-5213. |
| APA | Hu, Dehua.,Liu, Qing.,Tisdale, Jeremy.,Lei, Ting.,Pei, Jian.,...&Hu, Bin.(2015).Seebeck Effects in N-Type and P-Type Polymers Driven Simultaneously by Surface Polarization and Entropy Differences Based on Conductor/Polymer/Conductor Thin-Film Devices.acs nano,9(5),5208-5213. |
| MLA | Hu, Dehua,et al."Seebeck Effects in N-Type and P-Type Polymers Driven Simultaneously by Surface Polarization and Entropy Differences Based on Conductor/Polymer/Conductor Thin-Film Devices".acs nano 9.5(2015):5208-5213. |
入库方式： OAI收割
来源：大连化学物理研究所
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