Frontiers in Chemistry (May 2019)

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
https://doi.org/10.3389/fchem.2019.00373
Journal volume & issue
Vol. 7

Abstract

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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.

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