Hybrid Host Materials For Electrophosphorescent Devices
申请人:Chen Shaw H.
公开号:US20100184942A1
公开(公告)日:2010-07-22
Compounds (including polymers) for use in hybrid host materials which can be used in electroluminescent devices. The compounds comprise at least one electron-transporting moiety and at least one hole-transporting moiety which are joined by a flexible linker. Hybrid host materials comprising the compounds exhibit stability against phase separation, elevated glass transition temperature, morphological stability against crystallization, and isolation of the electron transporting moiety and hole transporting moiety π-systems.
A new class of non-conjugated bipolar hybrid hosts for phosphorescent organic light-emitting diodes
作者:Lichang Zeng、Thomas Y.-H. Lee、Paul B. Merkel、Shaw H. Chen
DOI:10.1039/b909787b
日期:——
Comprising hole- and electron-transporting moieties with flexible linkages, representative non-conjugated bipolar hybrids have been synthesized and characterized for a demonstration of their potential use as host materials for the fabrication of phosphorescent organic light-emitting diodes. The advantages of this material class include solution processing into amorphous films with elevated glass transition temperatures, stability against phase separation and crystallization, and provision of LUMO/HOMO levels and triplet energies contributed by the two independent moieties without constraint by the electrochemical energy gap. While exciplex formation between the hole- and electron-transporting moieties is inevitable, its adverse effects on spectral purity and device efficiency can be avoided by trapping charges on triplet emitters, as demonstrated for Ir(mppy)3 in TRZ-3Cz(MP)2, and TRZ-1Cz(MP)2. With these two bipolar hybrids and hole-transporting Cz(MP)2 as the host, the maximum current efficiency of the bilayer PhOLED is achieved with TRZ-3Cz(MP)2, but the driving voltage decreases monotonically with an increasing TRZ content.
METHOD FOR SYNTHESIS OF IRIDUIM (III) COMPLEXES WITH STERICALLY DEMANDING LIGANDS
申请人:Alleyne Bert
公开号:US20090124805A1
公开(公告)日:2009-05-14
Phosphorescent materials and devices with improved device manufacturing, fabrication, stability, efficiency, and/or color.
具有改进的器件制造、制造、稳定性、效率和/或颜色的磷光材料和器件。
C–H Functionalization Reactions of Unprotected <i>N</i>-Heterocycles by Gold-Catalyzed Carbene Transfer
作者:Sripati Jana、Claire Empel、Chao Pei、Polina Aseeva、Thanh V. Nguyen、Rene M. Koenigs
DOI:10.1021/acscatal.0c02230
日期:2020.9.4
The C–Hfunctionalization reaction of N-heterocycles with an unprotected N–H group is one of the most step-economic strategies to introduce functional groups without the need for installation and removal of protecting groups. Despite recent significant advances in C–Hfunctionalization chemistry, this strategy remains unsatisfactorily developed. In this report, we disclose a simple and straightforward
COMPOUND, COMPOSITION, ORGANIC ELECTROLUMINESCENCE ELEMENT, AND ELECTRONIC DEVICE
申请人:IDEMITSU KOSAN CO., LTD.
公开号:US20180037574A1
公开(公告)日:2018-02-08
A compound has a first structure represented by a formula (1), a second structure represented by a formula (2), a third structure represented by a formula (3), and a fourth structure represented by a formula (4), the first structure, the second structure, the third structure and the fourth structure being mutually independently present in a molecule,