合成了一组在联苯核的4,4'-位置上带有寡咔唑树枝状的树枝状聚合物,用作溶液可加工的磷光有机发光二极管(PHOLED)的主体材料。与传统的小分子主体4,4'-N,N'-二咔唑联苯(CBP)相比,树枝状结构为这些材料提供了额外的优势,包括无定形性质,极高的玻璃化转变温度(约376°C)和溶液-可加工性,但固有的三重态能量相同(2.60–2.62 eV)。与广泛使用的聚合物主体聚乙烯咔唑(PVK)相比,这些树枝状聚合物具有更高的HOMO水平(–5.61至–5.42 eV),有助于有效的空穴注入,并有利于OLED的高功率效率。这些树枝状聚合物的良好特性和可加工性使得通过将树枝状聚合物作为磷光主体进行旋涂来制造高效的PHOLED成为可能。含Ir(ppy)的绿色PHOLED3(Hppy = 2-苯基吡啶)掺杂剂的峰值效率高达38.71 cd A -1和15.69 lm W -1,远远超过带有PVK主机的控制装置的峰值效率(27
Highly stable permanentlyinterlockedaryleneethynylene molecular cages were synthesized from simple triyne monomers using dynamicalkynemetathesis. The interlocked complexes are predominantly formed in the reaction solution in the absence of any recognition motif and were isolated in a pure form using column chromatography. This study is the first example of the thermodynamically controlled solution‐phase
[EN] 2-ALKYL-5-PHENYL OXADIAZOLE-CARBAZOLE HOSTS FOR GUEST EMITTERS<br/>[FR] HÔTES DE 2-ALKYL-5-PHÉNYL-OXADIAZOLE-CARBAZOLE POUR ÉMETTEURS HÉBERGÉS
申请人:GEORGIA TECH RES INST
公开号:WO2012088316A1
公开(公告)日:2012-06-28
The various inventions and/or their embodiments disclosed herein relate to and include 2-alkyl-5-phenyl-1,3,4-oxadiazole-carbazole ("2-APOC") small molecules having both hole carrying and electron carrying groups bound thereto, and the use of such ambipolar polymers, copolymers, and/or small molecules as host materials for carrying holes, electrons, and/or excitons into contact with guest light emitters, for use in the emissive layers of electronic devices such as organic light emitting diodes.
Albrecht, Ken; Yamamoto, Kimihisa, Journal of the American Chemical Society, 2009, vol. 131, p. 2244 - 2251
作者:Albrecht, Ken、Yamamoto, Kimihisa
DOI:——
日期:——
Novel organic dyes incorporating a carbazole or dendritic 3,6-diiodocarbazole unit for efficient dye-sensitized solar cells
作者:Li-Lin Tan、Li-Jun Xie、Yong Shen、Jun-Min Liu、Li-Min Xiao、Dai-Bin Kuang、Cheng-Yong Su
DOI:10.1016/j.dyepig.2013.09.025
日期:2014.1
Four organic photosensitizers incorporating a carbazole or 3,6-diiodocarbazole unit as the electron donor, a benzene/thiophene or oligothiophene moiety as the conjugated spacer, and 2-cyanoacrylic acid as the electron acceptor have been synthesized. The photovoltaic performance data are quite sensitive to the structural modification of sensitizer. The introduction of the benzene/thiophene linker benefits from lower tendency to aggregate, but disfavors the electron transport between donor and acceptor. The addition of a thiophene unit in the bridge efficiently red-shifts the absorption response, however, organic dyes have some pi-pi aggregation. Incorporation of 3,6-diiodocarbazole as a dendritic donor unit not only enhances the molar extinction coefficients of the absorption but also suppresses the charge recombination with electrolyte. (C) 2013 Elsevier Ltd. All rights reserved.