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10‐2: Invited Paper : Unified Analysis of Transient and Steady‐State Electroluminescence –Establishing an Analytical Formalism for OLED Charge Balance
Author(s) -
Hershey Kyle W.,
Holmes Russell J.
Publication year - 2017
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.11576
Subject(s) - oled , electroluminescence , transient (computer programming) , steady state (chemistry) , polaron , formalism (music) , exciton , detailed balance , optoelectronics , excitation , population , materials science , transient analysis , mechanics , computational physics , physics , computer science , statistical physics , chemistry , quantum mechanics , nanotechnology , art , musical , demography , layer (electronics) , sociology , electron , visual arts , operating system
Organic light‐emitting devices (OLEDs) can exhibit an efficiency roll‐off under high current excitation that has been previously modeled using bimolecular quenching. The corresponding transient electroluminescence behavior has not been as effectively treated. Here, we reproduce both the steady‐state and transient regimes by introducing into the analysis a dynamic polaron population. This approach permits a rigorous definition of OLED charge balance in terms of dynamics as the exciton formation efficiency.