Zhang, Ning; Zheng, Caijun; Chen, Zhipeng; Zhao, Juewen; Zhang, Ming; Yang, Haoyu; He, Zeyu; Du, Xiaoyang; Tao, Silu published the artcile< Improving the efficiency of exciplex based OLEDs by controlling the different configurations of the donor>, Synthetic Route of 3921-01-5, the main research area is organic light emitting diode efficiency donor configuration.
Two D-A-D type donor materials, 10,10′-(pyridine-2,4-diyl)bis(9,9-dimethyl-9,10-dihydroacridine) (Pra-2DMAC) with vertical mol. conformation and 10,10′-(pyrimidine-2,4-diyl)bis(9,9-dimethyl-9,10-dihydroacridine) (Prm-2DMAC) with near-planar mol. conformation, were designed and synthesized in order to develop the performance of exciplex based OLEDs. Pra-2DMAC shows a better performance than Prm-2DMAC, due to its vertical configuration, which has a beneficial effect on exciplex emission because the separated HOMO and LUMO in donor facilitates the intramol. charge transfer (ICT) and reverse intersystem crossing (RISC) process at the excited state. An exciplex device with a simple structure based on Pra-2DMAC shows a high maximum external quantum efficiency (EQE) of 15.0% (13.9% at 1000 cd m-2), low turn-on voltage of 2.4 V, and stable electroluminescence spectrum of nearly constant CIE coordinate. The better performance of Pra-2DMAC demonstrates the superiority of the donor with vertical configurations in an exciplex system. To our knowledge, this is the first work to study exciplex based OLEDs using dual configuration donor materials.
Journal of Materials Chemistry C: Materials for Optical and Electronic Devices published new progress about Cyclic voltammetry. 3921-01-5 belongs to class pyrimidines, and the molecular formula is C4H2Br2N2, Synthetic Route of 3921-01-5.
Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia