37.2: Efficiency Improvement of Fluorescent Blue Device by Molecular Orientation of Blue Dopant

Autor:	Yumiko Mizuki, Ryo Naraoka, Toshinari Ogiwara, Hitoshi Kuma, Masakazu Funahashi, Hirokatsu Ito
Rok vydání:	2013
Předmět:	Molecular geometry Dopant Chemistry business.industry Analytical chemistry Molecule Optoelectronics business Spectroscopy Current density Fluorescence Dielectric spectroscopy
Zdroj:	SID Symposium Digest of Technical Papers. 44:515-518
ISSN:	0097-966X
DOI:	10.1002/j.2168-0159.2013.tb06258.x
Popis:	The relationship between molecular shape of fluorescent blue dopants (BDs) and molecular orientation factor was studied. BDs with larger ovality showed higher orientation factor and higher EQE over 10% in a fluorescent blue device. Impedance spectroscopy, transient EL spectroscopy and optical simulation results highly indicate that such high EQE is originated mainly from the optical effect of horizontal-aligned BDs. Furthermore, a higher EQE of 11.5% at a current density of 10mA/cm2 was successfully achieved by modifying molecular structure of BD.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2a2398ec3a6c07e64887488abacb9680 https://doi.org/10.1002/j.2168-0159.2013.tb06258.x Zobrazit plný text záznamu Plný text