145771-93-3Relevant articles and documents
High hole mobilities in carbazole-based glass-forming hydrazones
Ostrauskaite, Jolita,Voska, Viktoras,Antulis, Jacek,Gaidelis, Valentas,Jankauskas, Vygintas,Grazulevicius, Juozas V.
, p. 3469 - 3474 (2002)
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.
An electronic transmission material and its preparation and device
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, (2017/10/14)
The invention provides carbazole-imidazole electron transport materials. Based on triphenyl imidazole and carbazole, a kind of classic compounds is formed by connecting triphenyl imidazole and carbazole with benzene of different substituent groups. A preparation method is based on improvement of existing methods. Through repeated verification, the preparation method is simple in synthesis and purification processes and low in cost and can meet the industrial development requirements. A device prepared by using the substances has high light emitting efficiency.
High-efficiency deep blue fluorescent emitters based on phenanthro[9,10-d]imidazole substituted carbazole and their applications in organic light emitting diodes
Gao, Zhao,Wang, Zhiming,Shan, Tong,Liu, Yulong,Shen, Fangzhong,Pan, Yuyu,Zhang, Huanhuan,He, Xin,Lu, Ping,Yang, Bing,Ma, Yuguang
, p. 2667 - 2676 (2014/12/10)
A 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 transporting properties. OLEDs using M2 as emitting layer is observed to deliver a truly deep blue CIE of y 3is attained with a maximum current efficiency of 33.35 cd A-1, a power efficiency of 22.99 lm W-1and a maximum external quantum efficiency of 9.47%. When doped with an orange fluorescent material, upon careful tuning the doping proportion, the two-emitting-component white OLED is successfully fabricated with a maximum current efficiency of 5.53 cd A-1and CIE coordinates of (0.313, 0.305). Both the non-doped and doped devices exhibited high operational stability with negligible efficiency roll-off over the broad current density range.
