Designing Interfaces That Function to Facilitate Charge Injection in Organic Light-Emitting Diodes
摘要:
Layer-by-layer (LbL) assembly of triarylamine (TAA)-containing polymers has been applied for anode functionalizations in organic light-emitting diodes (OLEDs). Surface work function of the ITO electrodes was significantly altered with the functionalizations, and the values changed depending on electron affinity of the substituents (X) on the TAA units. When the functionalized ITO electrodes were utilized for the conventional TPD/Alq OLED, the multilayers of P1 (X = 4-OMe) and P2 (X = none) were found to promote better energy matching at the ITO/TPD interface to reduce the hole injection barrier. Furthermore, the multilayers having heterodeposited structure of several TAA polymers provided stepped and graded electronic profiles to facilitate hole mobility from ITO to TPD, so that the resulting OLED devices can exhibit appreciably reduced turn-on voltage and higher luminous intensities.
Palladate Precatalysts for the Formation of C–N and C–C Bonds
作者:Caroline M. Zinser、Katie G. Warren、Fady Nahra、Abdullah Al-Majid、Assem Barakat、Mohammad Shahidul Islam、Steven P. Nolan、Catherine S. J. Cazin
DOI:10.1021/acs.organomet.9b00326
日期:2019.7.22
A series of imidazolium-based palladate precatalysts has been synthesized and the catalytic activity of these air- and moisture-stable complexes evaluated as a function of the nature of the imidazolium counterion. These precatalysts can be converted under catalytic conditions to Pd-NHC species capable of enabling the Buchwald-Hartwig aryl amination and the alpha-arylation of ketones. Both reactions can be carried out efficiently under very mild operating conditions. The effectiveness of the protocol was tested on functionality-laden substrates.
Palladium-Catalyzed Direct Synthesis of Carbazoles via One-Pot <i>N</i>-Arylation and Oxidative Biaryl Coupling: Synthesis and Mechanistic Study
An efficient catalytic system has been developed for the synthesis of carbazoles by one-pot N-arylation and oxidative biaryl coupling. A significant substituent effect of the diarylamine intermediate on oxidative Coupling was observed. Mechanistic studies of oxidative coupling, including trapping of reaction intermediates and kinetic isotope effect experiments, are also presented.
COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT USING SAME AND ELECTRONIC DEVICE THEREFOR
申请人:DUK SAN NEOLUX CO., LTD.
公开号:US20190296244A1
公开(公告)日:2019-09-26
Provided are an organic electronic element and an electronic device therefor, the organic electronic element having a mixture of a compound according to the present invention used as a material therefor, thereby enabling the achievement of high light-emitting efficiency and low driving voltage of the organic electronic element, and enabling the life of the element to be greatly extended.
[EN] COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT USING SAME AND ELECTRONIC DEVICE THEREFOR<br/>[FR] COMPOSÉ POUR ÉLÉMENT ÉLECTRONIQUE ORGANIQUE, ÉLÉMENT ÉLECTRONIQUE ORGANIQUE L'UTILISANT ET DISPOSITIF ÉLECTRONIQUE ASSOCIÉ<br/>[KO] 유기전기소자용 화합물, 이를 이용한 유기전기소자 및 그 전자 장치
申请人:DUK SAN NEOLUX CO LTD
公开号:WO2017204557A1
公开(公告)日:2017-11-30
본 발명에 따른 화합물의 혼합물을 유기전기소자의 재료로 이용함으로써, 유기전기소자의 높은 발광효율, 낮은 구동전압을 달성할 수 있으며, 또한 소자의 수명을 크게 향상시킬 수 있는 유기전기소자, 그 전자장치를 제공한다.