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A Complete Quantitative Analysis of Spatio‐Temporal Dynamics of Excitons in Functional Organic Light‐Emitting Diodes
Author(s) -
Dey Amrita,
Rao Akshay,
Kabra Dinesh
Publication year - 2017
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201600678
Subject(s) - annihilation , oled , exciton , realization (probability) , singlet state , polaron , diode , optoelectronics , materials science , computer science , physics , nanotechnology , particle physics , condensed matter physics , quantum mechanics , electron , statistics , mathematics , layer (electronics) , excited state
The spatio‐temporal dynamics of excitons in functional polymer light‐emitting diodes reveal that singlet–triplet annihilation (STA) is significantly higher than the often invoked singlet–polaron annihilation (SPA). STA holds back the efficiencies of PLEDs and further realization of organic injection lasers. Additional singlets are found in F8BT that are related to thermally activated delayed fluorescence (TADF), as triplet–triplet annihilation (TTA) alone cannot account for the observed high external quantum efficiencies.