Ningbo Lumilan Advanced Materials Co., Ltd.

Wenming Zhu

Zhi Kuan Chen

Hua Sun

Kunshan Xie

The invention relates to a 9,10-dihydro-acridine derivative having a structure of Formula (I). The HOMO and LUMO levels of the 9,10-dihydro-acridine derivative are distributed on different electron donating and electron withdrawing groups, such that the HOMO and LUMO levels are separated, achieving a small &#x394;E. The 9,10-dihydro-acridine derivative can be used as a TADF material in an organic light-emitting device. The dihydro-acridinyl group in the electron donating group is linked to a dibenzoheterocyclic ring. Introducing modifying groups allows adjustment of triplet and singlet energy levels of the compound, enabling the TADF material to have a high luminescence efficiency in blue and deep blue regions. The invention also relates to an organic light-emitting device having at least one functional layer containing the 9,10-dihydro-acridine derivative. When the compound is used as a guest luminescent material in a light emitting layer, an OLED device of high blue light emitting efficiency is obtained.

9,10-dihydro-acridine derivative, and preparation method and use thereof

The present invention discloses a 9,10-dihydro-acridine derivative having a structure of Formula (I). The compound has a suitable HOMO energy level that matches that of an anode and light emitting layer when used as a material of a hole transport layer, thus reducing the potential barrier needed to overcome when holes are transported to the light emitting layer, and reducing the operating voltage of the device. Moreover, the 9,10-dihydro-acridine derivative has high triplet energy level and LUMO level, to avoid the returning of energy from the light emitting layer, retain the electrons in the light emitting layer, increase the probability of recombination of electrons and holes in the light emitting layer, and enhance the luminescence efficiency of the device. The compound of Formula (I) has high glass transition temperature, good film forming performance, and high thermal stability. The present invention further discloses an organic light-emitting device having at least one functional layer containing the 9,10-dihydro-acridine derivative. When the compound is used as a material of the hole transport layer, a light-emitting device of high luminescence efficiency and low driving voltage is obtained.

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Ningbo, China

Wenming Zhu