Flexible diphenylsulfone versus rigid dibenzothiophene-dioxide as acceptor moieties in donor-acceptor-donor TADF emitters for highly efficient OLEDs
作者:Dalius Gudeika、Jiun Haw Lee、Pei-Hsi Lee、Chia-Hsun Chen、Tien-Lung Chiu、Glib V. Baryshnikov、Boris F. Minaev、Hans Ågren、Dmytro Volyniuk、Oleksandr Bezvikonnyi、Juozas V. Grazulevicius
DOI:10.1016/j.orgel.2020.105733
日期:2020.8
Flexible versus rigid molecular structures of donor-acceptor-donor type compounds are investigated with respect to efficiency of thermallyactivateddelayedfluorescence (TADF) by theoretical and experimental approaches. Three highly efficient TADF emitters based on flexible diphenylsulfone and rigid dibenzothiophene dioxide as acceptor units and di-tert-butyldimethyldihydroacridine as donor moiety
通过理论和实验方法研究了供体-受体-供体型化合物的柔性分子结构与刚性分子结构的热活化延迟荧光(TADF)效率。基于挠性二苯砜和刚性二苯并噻吩二氧化物作为受体单元和二酯的三种高效TADF发射器设计合成了丁基丁基二甲基二氢ac啶。尽管它们在适当的宿主中显示出相似的单重态-三重态分裂(0.01–0.02 eV)和高的光致发光量子产率,但基于这些发射器的有机发光器件分别获得的最大外部量子效率分别为24.1%和15.9 / 19.4%, ,灵活而刚性的分子结构。具有柔性分子结构的发光化合物的高效率可以追溯到最低单线态和三线态的双构型性质,从而导致自旋轨道耦合性高于具有刚性结构的分子。所有衍生物均表现出双极电荷传输特性。器件效率高,电子迁移率达3×10 -5 cm 2对于具有柔性分子结构的对二取代二苯砜层,记录了在 -5×10 5 Vcm -1的电场下的V -1 s -1和空穴迁移率1.3×10 -4
Three-dimensional organic cage with narrowband delayed fluorescence
restriction of intramolecular flipping by locking the buildingblocks within a rigid framework, this emissive organic cage further showed narrowband ultra-deep blue electroluminescence emission at 413 nm with a full-width at half-maximum of 35 nm. This finding not only expands the family of electroluminescentorganic cages, but also opens up a new platform for delayed fluorescence materials with high
Monomer containing electron-withdrawing group and electron-donative group, and copolymer and proton-conductive membrane comprising same
申请人:JSR Corporation
公开号:EP1245554A1
公开(公告)日:2002-10-02
A monomer containing an electron-withdrawing group and an electron-donative group which can be easily controlled in the upper limit of the amount of a sulfonic acid , which impairs the mechanical properties of a copolymer, and can provide a sulfonated polymer that forms a proton-conductive membrane having a high proton conductivity over a wide temperature range, an excellent mechanical strength and an excellent proton conductivity and showing inhibited swelling in hot water and an aqueous solution of methanol, and a copolymer obtained from the monomer. A monomer containing an electron-withdrawing group and an electron-donative group represented by the following general formula (1) :
wherein Y represents a iodine atom, chlorine atom or bromine atom; X represents an electron-withdrawing group; B represents an electron-donative group; and Z represents an aryl group having a specific structure or a monovalent condensed ring hydrocarbon group such as naphthyl group.
一种含有一个抽电子基团和一个负电子基团的单体,该单体可以很容易地控制磺酸的用量上限,而磺酸会损害共聚物的机械性能,并可以提供一种磺化聚合物,该聚合物可以在很宽的温度范围内形成具有高质子传导性、优异的机械强度和优异的质子传导性的质子传导膜,并在热水和甲醇水溶液中表现出抑制溶胀的特性,以及由该单体得到的共聚物。一种单体,含有由下式通式(1)代表的一个电子吸收基团和一个电子疏导基团:
其中 Y 代表碘原子、氯原子或溴原子;X 代表抽电子基团;B 代表弃电子基团;Z 代表具有特定结构的芳基或一价缩合环烃基团,如萘基。