ICCAS OpenIR
Chain-length dependence of singlet and triplet exciton formation rates in organic light-emitting diodes
Beljonne, D; Ye, AJ; Shuai, Z; Bredas, JL
2004-07-01
Source PublicationADVANCED FUNCTIONAL MATERIALS
ISSN1616-301X
Volume14Issue:7Pages:684-692
AbstractThe operation and efficiencies of molecular or polymer organic light-emitting diodes depend on the nature of the excited species that are formed. The lowest singlet and triplet excitons display different characteristics that impact on the quantum yields achievable in the devices. Here, by performing correlated quantum-chemical calculations that account for both the electronic couplings and energetics of the charge-recombination process from a pair of positive and negative polarons into singlet and triplet excitons, we show that the formation rates for singlet over triplet excitons vary with chain length and favor singlet excitons in longer chains. Thus, in polymer devices, the resulting singlet/triplet fraction can significantly exceed the spin-statistical limit.
DOI10.1002/adfm.200305176
Indexed BySCI
Language英语
WOS IDWOS:000223180700007
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Cited Times:80[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/82106
Collection中国科学院化学研究所
Corresponding AuthorBeljonne, D
Affiliation1.Univ Mons, B-7000 Mons, Belgium
2.Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA
3.Chinese Acad Sci, Ctr Mol Sci, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Beljonne, D,Ye, AJ,Shuai, Z,et al. Chain-length dependence of singlet and triplet exciton formation rates in organic light-emitting diodes[J]. ADVANCED FUNCTIONAL MATERIALS,2004,14(7):684-692.
APA Beljonne, D,Ye, AJ,Shuai, Z,&Bredas, JL.(2004).Chain-length dependence of singlet and triplet exciton formation rates in organic light-emitting diodes.ADVANCED FUNCTIONAL MATERIALS,14(7),684-692.
MLA Beljonne, D,et al."Chain-length dependence of singlet and triplet exciton formation rates in organic light-emitting diodes".ADVANCED FUNCTIONAL MATERIALS 14.7(2004):684-692.
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