Field effect on the singlet and triplet exciton formation in organic/polymeric light-emitting diodes
文献类型：期刊论文
| 作者 | Yin, SW; Chen, LP; Xuan, PF; Chen, KQ; Shuai, Z |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY B
 |
| 出版日期 | 2004-07-15 |
| 卷号 | 108期号:28页码:9608-9613 |
| ISSN号 | 1520-6106 |
| DOI | 10.1021/jp037327h |
| 英文摘要 | Recently, both experimental and theoretical evidence indicate that the electrically-generated singlet and triplet exciton formation ratio (r(S/T)) in conjugated polymers can exceed the 1:3 spin statistics limit. However, the extent that the electric field influences r(S/T) is in controversy. By measuring the rates of photo- and electro-phosphorescence and fluorescence, Wilson et al.(6) concluded that the ratio r(S/T) is independent of the external electric field; Lin et al.(8) found that the ratio increases monotonically with the electric field by measuring the relative densities of singlet and triplet exciton in EL and PL processes; from a quantum-dynamical calculation, Tandon et al.(11) observed an abrupt increase in the ratio with respect to the electric field. In this work, we apply a correlated quantum-chemical approach coupled with a first-order perturbation, to investigate the relationship between the formation ratio and the electric field. We have calculated the influences of the electric field on the singlet and triplet exciton states as well as on the electron-hole free pair (charge-transfer) state. It is found that for p-phenylene-vinylene oligomer, the formation ratio of singlet excitons with respect to triplet excitons increases with the electric field. |
| 语种 | 英语 |
| WOS记录号 | WOS:000222639900011 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/55685]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Shuai, Z |
| 作者单位 | Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Lab Organ Solids, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yin, SW,Chen, LP,Xuan, PF,et al. Field effect on the singlet and triplet exciton formation in organic/polymeric light-emitting diodes[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2004,108(28):9608-9613. |
| APA | Yin, SW,Chen, LP,Xuan, PF,Chen, KQ,&Shuai, Z.(2004).Field effect on the singlet and triplet exciton formation in organic/polymeric light-emitting diodes.JOURNAL OF PHYSICAL CHEMISTRY B,108(28),9608-9613. |
| MLA | Yin, SW,et al."Field effect on the singlet and triplet exciton formation in organic/polymeric light-emitting diodes".JOURNAL OF PHYSICAL CHEMISTRY B 108.28(2004):9608-9613. |
入库方式： OAI收割
来源：化学研究所
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