Charge-recombination processes in oligomer- and polymer-based light- emitting diodes: A molecular picture
文献类型：期刊论文
| 作者 | Beljonne, D; Shuai, ZG; Ye, AJ; Bredas, JL |
| 刊名 | JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY
 |
| 出版日期 | 2005-05-01 |
| 卷号 | 13期号:5页码:419-427 |
| 关键词 | Organic Light-emitting Diodes Polymer Light-emitting Diodes Singlet And Triplet Excitons Charge Transfer Charge Recombination Intersystem Crossing |
| ISSN号 | 1071-0922 |
| 英文摘要 | An overview of our recent work on the mechanisms of singlet and triplet exciton formation in electroluminescent pi-conjugated materials will be presented. According to simple spin statistics, only one-fourth of the excitons are formed as singlets. However, deviations from that statistics can occur if the initially formed triplet charge-transfer (CT) excited states are amenable to intersystem crossing or dissociation. Although the electronic couplings between the CT states and the neutral exciton states are expected to be largest for the lowest singlet and triplet excitons (S-1 and T-1, respectively), the possibility for direct recombination into T-1 is always very small due to the large exchange energy. In small molecules, spin statistics is expected to be observed because both singlet and triplet exciton formations proceed via higher-lying S-n/T-n states with similar electronic couplings and fast formation rates. In extended conjugated chains, however, that the (CT)-C-1 -> S-1 pathway is faster while the (CT)-C-3 -> T-n channels become much slower, opening the route to intersystem crossing or dissociation among the (CT)-C-3 states. |
| 语种 | 英语 |
| WOS记录号 | WOS:000236278800008 |
| 出版者 | SOC INFORMATION DISPLAY |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/56311]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Beljonne, D |
| 作者单位 | 1.Univ Mons, Lab Chem Novel Mat, B-7000 Mons, Belgium 2.Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA USA 3.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing, Peoples R China 4.Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA USA 5.Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA USA |
| 推荐引用方式 GB/T 7714 | Beljonne, D,Shuai, ZG,Ye, AJ,et al. Charge-recombination processes in oligomer- and polymer-based light- emitting diodes: A molecular picture[J]. JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY,2005,13(5):419-427. |
| APA | Beljonne, D,Shuai, ZG,Ye, AJ,&Bredas, JL.(2005).Charge-recombination processes in oligomer- and polymer-based light- emitting diodes: A molecular picture.JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY,13(5),419-427. |
| MLA | Beljonne, D,et al."Charge-recombination processes in oligomer- and polymer-based light- emitting diodes: A molecular picture".JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY 13.5(2005):419-427. |
入库方式： OAI收割
来源：化学研究所
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