Spin Radical Enhanced Magnetocapacitance Effect in Intermolecular Excited States
文献类型：期刊论文
| 作者 | Zang, Huidong1; Wang, Jianguo2; Li, Mingxing1; He, Lei1; Liu, Zitong2; Zhang, Deqing2; Hu, Bin1,3 |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY B
 |
| 出版日期 | 2013-11-14 |
| 卷号 | 117期号:45页码:14136-14140 |
| ISSN号 | 1520-6106 |
| DOI | 10.1021/jp407789g |
| 英文摘要 | This article reports the magnetocapacitance effect (MFC) based on both pristine polymer MEH-PPV and its composite system doped with spin radicals (6R-BDTSCSB). We observed that a photoexcitation leads to a significant positive MFC in the pristine MEH-PPV. Moreover, we found that a low doping of spin radicals in polymer MEH-PPV causes a significant change on the MFC signal: an amplitude increase and a line-shape narrowing under light illumination at room temperature. However, no MFC signal was observed under dark conditions in either the pristine MEH-PPV or the radical-doped MEH-PPV. Furthermore, the magnitude increase and line-shape narrowing caused by the doped spin radicals are very similar to the phenomena induced by increasing the photoexcitation intensity. Our studies suggest that the MFC is essentially originated from the intermolecular excited states, namely, intermolecular electron-hole pairs, generated by a photoexcitation in the MEH-PPV. More importantly, by comparing the effects of spin radicals and electrically polar molecules on the MFC magnitude and line shape, we concluded that the doped spin radicals can have the spin interaction with intermolecular excited states and consequently affect the internal spin-exchange interaction within intermolecular excited states in the development of MFC. Clearly, our experimental results indicate that dispersing spin radicals forms a convenient method to enhance the magnetocapacitance effect in organic semiconducting materials. |
| 语种 | 英语 |
| WOS记录号 | WOS:000327111200022 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/54663]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhang, Deqing |
| 作者单位 | 1.Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA 2.Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China 3.Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zang, Huidong,Wang, Jianguo,Li, Mingxing,et al. Spin Radical Enhanced Magnetocapacitance Effect in Intermolecular Excited States[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2013,117(45):14136-14140. |
| APA | Zang, Huidong.,Wang, Jianguo.,Li, Mingxing.,He, Lei.,Liu, Zitong.,...&Hu, Bin.(2013).Spin Radical Enhanced Magnetocapacitance Effect in Intermolecular Excited States.JOURNAL OF PHYSICAL CHEMISTRY B,117(45),14136-14140. |
| MLA | Zang, Huidong,et al."Spin Radical Enhanced Magnetocapacitance Effect in Intermolecular Excited States".JOURNAL OF PHYSICAL CHEMISTRY B 117.45(2013):14136-14140. |
入库方式： OAI收割
来源：化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。