Singlet and Triplet Exciton Formation Rates in Conjugated Polymer Light-Emitting Diodes

Abstract

By applying a molecular orbital perturbation approach, we calculate the formation rates for singlet and triplet molecular excitons associated with intermolecular charge-transfer processes. It is found that the interchain bond-charge correlation has a strong influence on the relative probabilities for generating singlet and triplet excitons. Most importantly, application of our approach to a model system for poly-(paraphenylenevinylene) shows that the ratio between the electroluminescence and photoluminescence quantum yields generally exceeds the 25% spin-degeneracy statistical limit.

Keywords

Singlet stateExcitonElectroluminescenceMaterials sciencePhotoluminescenceIntermolecular forceCharge (physics)Molecular physicsCondensed matter physicsPhysicsAtomic physicsOptoelectronicsMoleculeQuantum mechanicsExcited stateNanotechnology

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Publication Info

Year: 2000
Type: article
Volume: 84
Issue: 1
Pages: 131-134
Citations: 257
Access: Closed

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APA Style

                            
                                
                                    Zhigang Shuai, 
                                
                                    David Beljonne, 
                                
                                    R. Silbey
                                
                                et al.
                            
                            (2000). 
                            Singlet and Triplet Exciton Formation Rates in Conjugated Polymer Light-Emitting Diodes. 
                            Physical Review Letters
                            , 84
                            (1)
                            , 131-134.
                            https://doi.org/10.1103/physrevlett.84.131
                        

Identifiers

DOI: 10.1103/physrevlett.84.131
PMID: 11015852

Data Quality

Data completeness: 77%