3675275
doi
10.1117/12.2306408
oai:zenodo.org:3675275
Nils Haase
merck
Antonia Morherr
merck
ChristofPflumm
merck
Birk Fritsch
merck
Effect of matrix anisotropy on theapparent emitter orientation inOrganic LED
Norbert Danz
fraunhofer institute
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
organic light-emitting diode, electroluminescence, birefringence, emitter orientation, optical simulation
<p>Spontaneously aligning emitter molecules can improve the external efficiency of OLED devices and have beenreportedfor different types of emittersdoped into suitable hosts. Similar to the morphological alignment of the active molecules, a birefringence of the host affects the apparent emitter orientation. In order to investigate this effect experimentally, Ir(ppy)3is co-evaporated into the emitting layer of OLED using hosts with different birefringence properties. Analyzing the electroluminescence emission patterns quantitatively reveals the apparent orientation distribution of the emitters. The results emphasize that host birefringence can be used to suppress perpendicular emitter contributions while amplifying the impact of the horizontal dipoles, thus leading to an enhanced forward emission.</p>
Zenodo
2018-05-22
info:eu-repo/semantics/article
3675274
award_title=Development of high-performance, hyperfluorescence OLEDs for use in display applications and solid state lighting; award_number=732013; award_identifiers_scheme=url; award_identifiers_identifier=https://cordis.europa.eu/projects/732013; funder_id=00k4n6c32; funder_name=European Commission;
1582140055.385598
608353
md5:76a14d059831004f96b35da32b699856
https://zenodo.org/records/3675275/files/2018__danz__Proc_SPIE_106870U.pdf
public