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34‐1: Invited Paper: Towards Efficient and Stable Printed Single‐layer OLEDs
Author(s) -
Kotadiya Naresh B.,
Blom Paul W.M.,
Wetzelaer Gert-Jan A.H.
Publication year - 2020
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.13909
Subject(s) - oled , optoelectronics , exciton , materials science , diode , organic semiconductor , semiconductor , layer (electronics) , charge (physics) , trapping , photoluminescence , polymer , nanotechnology , physics , condensed matter physics , composite material , ecology , quantum mechanics , biology
The efficiency and stability of single‐layer polymer light‐emitting diodes is compromised by unbalanced charge transport, absence of triplet‐exciton harvesting and low photoluminescence quantum efficiencies. We demonstrate that tuning the energy levels of the organic semiconductor can prevent charge trapping, which is the main cause of unbalanced charge transport. By additionally using a novel strategy to enhance charge injection, efficient single‐layer organic light‐emitting diodes are presented based on a trap‐free organic semiconductor exhibiting thermally activated delayed fluorescence.