Jayabharathi, Jayaraman; Sivaraj, Sekar; Thanikachalam, Venugopal; Anudeebhana, Jagathratchagan published the artcile< Multifunctional pyridine styrylphenanthroimidazoles: electron transport materials for blue FOLEDs with low efficiency roll-off and hosts for PHOLEDs with low turn-on voltage>, Electric Literature of 3893-18-3, the main research area is electron transport material organic electroluminescent device.
We have reported pyridine styrylphenanthroimidazole derivatives, SPPI-C2Py, SPPI-N1Py and SPPI-C2N1Py, as efficient electron transport materials (ETMs) for blue fluorescent OLEDs (FOLEDs) and host materials for phosphorescent organic light emitting diodes (PHOLEDs). The optical and carrier transport abilities of pyridine styrylphenanthroimidazoles have been analyzed in terms of the linkage position as well as number of pyridine fragments. Devices with SPPI-C2Py, SPPI-N1Py and SPPI-C2N1Py as ETMs exhibit a maximum current efficiency (CE) of 14.28, 9.63 and 16.93 cd A-1, power efficiency (PE) of 9.32, 4.74 and 11.23 lm W-1 and external quantum efficiency (EQE) of 7.93, 5.50 and 8.68% relative to the widely used ETM BPhen (CE – 11.69 cd A-1; PE – 5.01 lm W-1; EQE – 5.89%). The blue PHOLEDs using SPPI-C2Py, SPPI-N1Py and SPPI-C2N1Py as hosts exhibit a CE of 34.32, 30.65 and 43.23 cd A-1, PE of 32.09, 28.32 and 40.54 lm W-1 and EQE of 18.56, 16.32 and 22.43%. The red PHOLEDs using SPPI-C2N1Py as a host exhibit a maximum CE of 25.78 cd A-1, PE of 22.68 lm W-1 and EQE of 18.56%. The yellow PHOLEDs using SPPI-C2N1Py as a host exhibit a maximum CE of 70.53 cd A-1, PE of 40.86 lm W-1 and EQE of 25.89%, resp. These findings demonstrated that the new born pyridine styrylphenanthroimidazoles can be employed as potential ETMs for blue FOLEDs and hosts for blue, red and yellow PHOLEDs.
Journal of Materials Chemistry C: Materials for Optical and Electronic Devices published new progress about Dipole moment. 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Electric Literature of 3893-18-3.
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary