Carbazole derivative charge transporting material using the same and
申请人:Takasago International Corporation
公开号:US05736284A1
公开(公告)日:1998-04-07
A charge transporting material high in solubility in a binder polymer and having high carrier mobility is disclosed, which contains a carbazole derivative represented by the following general formula (1): ##STR1## wherein Ar.sup.1 and Ar.sup.2, which may be the same or different, each represents an aryl group which may have a substituent group; R.sup.1 and R.sup.2, which may be the same or different, each represents a lower alkyl group or an aryl group which may have a substituent group; R.sup.3 represents a lower alkyl group, an alicyclic alkyl group having 5 to 7 carbon atoms, an aryl group which may have a substituent group, or an aralkyl group which may have a substituent group; and m and n each represents an integer of 0 or 1. An electrophotographic photoreceptor containing the charge transporting material is also disclosed.
High hole mobilities in carbazole-based glass-forming hydrazones
作者:Jolita Ostrauskaite、Viktoras Voska、Jacek Antulis、Valentas Gaidelis、Vygintas Jankauskas、Juozas V. Grazulevicius
DOI:10.1039/b209732j
日期:2002.11.29
The properties of a series of carbazole-based dihydrazones are reported. The dependence of their thermal and glass-forming properties on their chemical structure is discussed. The hydrazones having phenyl substituents at the N atom of the hydrazine moiety form glasses and their amorphous films on the glass or polyester substrates can be prepared by casting from solutions. The ionization potentials of the synthesized hydrazones measured by the electron photoemission technique range from 5.24 to 5.50 eV. Hole drift mobilities of some newly synthesized carbazole-based dihydrazones appproach 10−2 cm2 V−1 s−1 at an electric field of 6.4×105 V cm−1, at 22 °C.
报道了一系列以咔唑为基础的二肼酮的性质。讨论了它们的热特性和玻璃形成特性与化学结构之间的依赖关系。具有苯基取代基的肼酮在肼部分的氮原子上形成玻璃,其在玻璃或聚酯基材上的无定形薄膜可以通过从溶液中铸造来制备。合成的肼酮通过电子光电子发射技术测得的电离势在5.24到5.50电子伏特之间。在6.4×10^5 V cm^−1的电场下,某些新合成的以咔唑为基础的二肼酮的孔迁移率在22°C时接近10−2 cm² V−1 s−1。
High-efficiency deep blue fluorescent emitters based on phenanthro[9,10-d]imidazole substituted carbazole and their applications in organic light emitting diodes
series of highly efficient deep blue emitters comprising of carbazole and phenanthro[9,10-d]imidazole moieties are designed and synthesized. These compounds present deep blue emission, narrow FWHM, high quantum yields, high thermal and morphological stabilities. Among them, the design strategy of 2:1 ratio of phenanthro[9,10-d]imidazole and carbazole unit affords M2 with more balanced carrier injection and
设计并合成了一系列由咔唑和菲[9,10-d]咪唑部分组成的高效深蓝色发射体。这些化合物呈现深蓝色发射,窄的半高宽,高量子产率,高热稳定性和形态稳定性。其中,菲咯[9,10-d]咪唑和咔唑单元的比例为2:1的设计策略使M2具有更平衡的载流子注入和传输性能。观察到使用M2作为发光层的OLED可以提供y <0.06的真正深蓝色CIE,具有3.02%的最高外部量子效率。通过充分利用这些深蓝色发射体的优势,它们还可以用作荧光和磷光染料的出色基质。基于M2 / Ir(ppy)3的高性能绿色磷光器件以33.35 cd A -1的最大电流效率,22.99 lm W -1的功率效率和9.47%的最大外部量子效率来获得λ。当用橙色荧光材料掺杂时,在仔细调整掺杂比例后,成功地以5.53 cd A -1的最大电流效率和(0.313,0.305)的CIE坐标成功地制备了两种发光成分的白色OLED 。非掺杂和掺杂器