Phenothiazinen-Dimesitylarylborane-Based Thermally Activated Delayed Fluorescence: High-Performance Non-doped OLEDs With Reduced Efficiency Roll-Off at High Luminescence

Xiangyang Tang; Yanchun Tao; Hui Liu; Futong Liu; Xin He; Qiming Peng; Jinyu Li; Ping Lu

doi:10.3389/fchem.2019.00373

Phenothiazinen-Dimesitylarylborane-Based Thermally Activated Delayed Fluorescence: High-Performance Non-doped OLEDs With Reduced Efficiency Roll-Off at High Luminescence

Front Chem. 2019 May 29:7:373. doi: 10.3389/fchem.2019.00373. eCollection 2019.

Authors

Xiangyang Tang¹, Yanchun Tao¹, Hui Liu¹, Futong Liu¹, Xin He¹, Qiming Peng², Jinyu Li¹, Ping Lu¹

Affiliations

¹ State Key Lab of Supramolecular Structure and Materials, Jilin University, Changchun, China.
² Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing, China.

Abstract

We report a phenothiazinen-dimesitylarylborane thermally activated delayed fluorescence (TADF) molecule that exhibits high external quantum efficiency (EQE) in non-doped organic light-emitting diodes (OLEDs) at high luminescence. The non-doped device shows green electroluminescence with an emission peak of 540 nm and a maximum EQE of 19.66% obtained at a luminescence of ~170 cd m^-2. The EQE is still as high as 17.31% at a high luminescence of 1,500 cd m^-2 with small efficiency roll-off.

Keywords: high efficiency; low efficiency roll-off; non-doped device; organic light-emitting diodes; thermally activated delayed fluorescence.