1256573-06-4

Upstream product

• 108-86-1 bromobenzene 
• 73087-83-9 3,6-dibromo-9-(4-bromophenyl)-9H-carbazole 
• 1079-66-9 chloro-diphenylphosphine 
• 86-74-8 9H-carbazole 
• 57102-42-8 N-(4-bromophenyl)carbazole 
• 106-37-6 1.4-dibromobenzene 

Downstream Products

• 1234510-15-6 3,6-bis(diphenylphosphonyl)-9-[4-(diphenylphosphonyl)phenyl]-9H-carbazole 

Relevant academic research and scientific papers

Design of star-shaped molecular architectures based on carbazole and phosphine oxide moieties: Towards amorphous bipolar hosts with high triplet energy for efficient blue electrophosphorescent devices

With a carbazole moiety as the electron donor and a phosphine-oxide moiety as the electron acceptor, two novel star-shaped bipolar hosts, 4,4′,4″-tri(N-carbazolyl)triphenylphosphine oxide (TCTP) and 3,6-bis(diphenylphosphoryl)-9-(4′-(diphenylphosphoryl)phenyl)carbazole (TPCz), have been designed and synthesized. Their topology structure differences are that the phosphine-oxide moiety is located in the molecular centre and the periphery for TCTP and TPCz, respectively. The star-shaped architecture imparts them with high decomposition temperatures (Td: 497°C for TCTP and 506°C for TPCz) and results in the formation of a stable amorphous glassy state (Tg: 163°C for TCTP and 143°C for TPCz), while the phosphine oxide linkage ensures the disrupted conjugation and the high triplet energy (>3.0 eV). In addition, both TCTP and TPCz possess a bipolar transporting capability. However, TCTP mostly transports holes and TPCz primarily conducts electrons. On the basis of appropriate device configurations, high performance blue electrophosphorescent devices with comparable efficiency (35.0-36.4 cd A-1, 15.9-16.7%) have been realized using TCTP and TPCz as the host for the blue phosphor, respectively. Compared with the unipolar host, 4,4′,4″-tri(N-carbazolyl)triphenylamine (TCTA, 15.9 cd A -1, 7.8%), the efficiency is improved by more than two-fold. As far as the obtained state-of-the-art performance is concerned, we think that these novel materials should provide an avenue for the design of amorphous bipolar hosts with high triplet energy used for blue PhOLEDs on a star-shaped scaffold.

This polycarbazole-phosphine oxide compound and an organic electroluminescence element including (by machine translation)

The present invention relates to a carbazole-based phosphine oxide compound, and an organic electroluminescent device including the same. According to the present invention, provided are a compound for an organic electroluminescent device which can improve unstable thermal stability and low efficiency characteristics which are the problems of known compounds for an organic electroluminescent device, and particularly, can implement excellent efficiency characteristics in a pure blue phosphorescent device, by using the carbazole-based phosphine oxide compound of the compound for the organic electroluminescent device, and the organic electroluminescent device. According to one aspect of the present invention, the carbazole-based phosphine oxide compound of the compound for the organic electroluminescent device is provided, and the organic electroluminescent device containing the same which can implement thermal stability and high efficiency characteristics is also provided.