Carbazole derivatives, Bipolar charge transport layer materials, Phosphorescent host materials, OLEDs, Organic electronics.
Combining carbazole electron donors with a high triplet energy and a pyridine electron acceptor with a high electron affinity, 2,6-bis(3-(carbazol-9-yl)phenyl)pyridine (26DCzPPy) is one of the most popular bipolar host materials used in organic light-emitting diodes.
Bipolar host materials are molecules composed of an electron-donating moiety capable of mediating hole injection and transportation, and an electron-withdrawing moiety capable of mediating electron injection and transportation.
2,6-bis(3-(9H-carbazol-9-yl)phenyl)pyridine, also named DCzPPy, is a bipolar host material. It has high triplet energy, carrier mobilities, and deep highest occupied molecular orbital (HOMO) level . The host system was prepared by mixing the hole-transport-type host 4,4,4-tris(N-carbazolyl)triphenylamine with the electron-transport-type host 2,6-bis(3-(carbazol-9-yl)phenyl)pyridine to prepare the host system, which could not only improve CRI but also improve device efficiency[1-2].
2,6-Bis(3-(9H-carbazol-9-yl)phenyl)pyridine is a chemical component of organic light-emitting diodes.
[1] Xu F, et al. High color rendering white organic light-emitting diodes fabricated using a
broad-bandwidth red phosphorescent emitter for lighting applications. Synthetic Metals , 2012; 162: 2414-2420.
[2] Hung M, et al. Poly(acridan-grafted biphenyl germanium) with High Triplet Energy as a Universal Host for High-Efficiency Thermally Activated Delayed Fluorescence Full-Color Devices and Their Hybrid with Phosphor for White Light Electroluminescence. ACS Applied Materials & Interfaces , 2022; 14: 55873–55885.
