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24.3: Novel host and prime materials for efficient red emission OLEDs
Author(s) -
Chen Zhi-Kuan
Publication year - 2021
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.15110
Subject(s) - oled , prime (order theory) , host (biology) , materials science , optoelectronics , charge carrier , homo/lumo , charge (physics) , layer (electronics) , nanotechnology , chemistry , physics , molecule , ecology , mathematics , organic chemistry , quantum mechanics , biology , combinatorics
Novel host and prime materials for red light emission have been designed and synthesized. The physical and electronic properties of the materials have been well characterized. The HOMO, LUMO, S1 and T1 energy levels as well as their charge carrier mobilities have been measured. In order to pair with the state‐of‐the‐art red emitters, the energy levels and the charge carrier mobility of the host and prime materials have been carefully tailored. Through optimizing the thickness of each layer in the device, very promising device efficiency and operation lifetime based on optimal prime and host materials have been achieved. The OLED devices incorporating the best host and prime materials with top emission configurations demonstrated peak emission at 619 nm with a CIE (0.682, 0.318). The device showed a low turn on voltage of 2.09 V, current efficiencies of 66.3 cd/A at 10 mA/cm 2 and very good lifetime of 400h (LT95@50mA/cm 2 ).