[6p-A203-1~19] 12.4 Organic light-emitting devices and organic transistors

[6p-A203-13] New TADF Design with Coplanar Structures and Their Optoelectronic Properties

〇Youichi Tsuchiya^1,2, Yuma Ishikawa¹, Xiankai Chen³, Jean-Luc Bredas³, Chihaya Adachi^1,2,4 (1.Kyushu Univ., 2.JST ERATO, 3.Georgia Tech, 4.WPI-I2CNER)

Keywords:TADF, planer molecule

Based on the results of quantum chemical calculations, we designed TADF molecules with small ΔE _ST with large oscillator strength and electron donor part and electron acceptor part in the coplaner structure. HMAT-TRZ using azatriangulene as a planer donor unit and diphenyltriazine as an planer acceptor unit has a small structural change between the donor and acceptor in the singlet and triplet excited states. The orbitals of HMAT-TRZ in excited state also shows small changes. In this presentation we will describe the planar TADF molecule design and the photoelectronic properties of HMAT-TRZ.