Khodabakhshi, Elham, Ramanan, Charusheela, Michels, Jasper J., Bonus, Sven, Hertel, Dirk, Meerholz, Klaus ORCID: 0000-0001-7450-4672, Forster, Michael, Scherf, Ulrich and Blom, Paul W. M. (2020). Trap-Assisted Triplet Emission in Ladder-Polymer-Based Light-Emitting Diodes. Adv. Electron. Mater., 6 (5). HOBOKEN: WILEY. ISSN 2199-160X

Full text not available from this repository.

Abstract

The charge transport and recombination in light-emitting diodes (LEDs) based on a methyl-substituted poly(p-phenylene) ladder polymer (Me-LPPP) are investigated. The transport is characterized by a high room-temperature hole mobility of 2 x 10(-8) m(2) V-1 s(-1) combined with anomalously strong electron trapping. Their electroluminescence (EL) spectrum is characterized by a blue singlet emission, a broad green featureless peak, and a yellow-orange triplet emission. The voltage dependence of the EL spectrum and negative contribution to the capacitance indicate that the triplet-emission is of trap-assisted nature, consistent with the strong electron trapping. Consequently, the color purity of the blue emissive Me-LPPP polymer LEDs can be strongly improved using trap dilution.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Khodabakhshi, ElhamUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ramanan, CharusheelaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Michels, Jasper J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bonus, SvenUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hertel, DirkUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Meerholz, KlausUNSPECIFIEDorcid.org/0000-0001-7450-4672UNSPECIFIED
Forster, MichaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Scherf, UlrichUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blom, Paul W. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-340590
DOI: 10.1002/aelm.202000082
Journal or Publication Title: Adv. Electron. Mater.
Volume: 6
Number: 5
Date: 2020
Publisher: WILEY
Place of Publication: HOBOKEN
ISSN: 2199-160X
Language: English
Faculty: Faculty of Mathematics and Natural Sciences
Divisions: Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Physical Chemistry
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
CONJUGATED POLYMERS; KETONIC DEFECTS; FLUORESCENCE; TRANSPORT; ELECTROLUMINESCENCE; PHOSPHORESCENCE; ELECTRONMultiple languages
Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, AppliedMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/34059

Downloads

Downloads per month over past year

Altmetric

Export

Actions (login required)

View Item View Item