Premium
Influence of triplet excitons on the lifetime of polymer‐based organic light emitting diodes
Author(s) -
Pekkola Oili,
Gassmann Andrea,
Etzold Fabian,
Laquai Frédéric,
von Seggern Heinz
Publication year - 2014
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201330411
Subject(s) - oled , exciton , materials science , photochemistry , polymer , diode , optoelectronics , population , organic semiconductor , chemistry , physics , nanotechnology , condensed matter physics , demography , layer (electronics) , sociology , composite material
In this work, the harmful effect of triplet excitons on the lifetime of poly( p ‐phenylene vinylene) (PPV)‐based organic light emitting diodes is demonstrated. A model system has been designed in which the triplet population in a PPV derivative is increased by blending the polymer with the triplet sensitizer platinum (II) octaethylporphyrine ketone (PtOEPK). The increase in the triplet concentration of the polymer affects both the initial decay and the long‐term evolution of luminance and leads to a drastic acceleration of device degradation, reflected in a dramatically shortened lifetime.