Teng Teng1,2, Jinfan Xiong1, Gang Cheng3, Changjiang Zhou1,2, Xialei Lv1,2, Kai Li1. 1. College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China. 2. College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China. 3. State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
Abstract
A new series of tetrahedral heteroleptic copper(I) complexes exhibiting efficient thermally-activated delayed fluorescence (TADF) in green to orange electromagnetic spectral regions has been developed by using D-A type N^N ligand and P^P ligands. Their structures, electrochemical, photophysical, and electroluminescence properties have been characterized. The complexes exhibit high photoluminescence quantum yields (PLQYs) of up to 0.71 at room temperature in doped film and the lifetimes are in a wide range of 4.3-24.1 μs. Density functional theory (DFT) calculations on the complexes reveal the lowest-lying intraligand charge-transfer excited states that are localized on the N^N ligands. Solution-processed organic light emitting diodes (OLEDs) based on one of the new emitters show a maximum external quantum efficiency (EQE) of 7.96%.
A new series of class="Disease">tetrahedral heterolepticcopper(I) comclass="Chemical">pan class="Chemical">plexes exhibiting efficient thermally-activated delayed fluorescence (TADF) in green to orange electromagnetic spectral regions has been developed by using D-A type N^N ligand and P^P ligands. Their structures, electrochemical, photophysical, and electroluminescence properties have been characterized. The complexes exhibit high photoluminescence quantum yields (PLQYs) of up to 0.71 at room temperature in doped film and the lifetimes are in a wide range of 4.3-24.1 μs. Density functional theory (DFT) calculations on the complexes reveal the lowest-lying intraligand charge-transfer excited states that are localized on the N^N ligands. Solution-processed organic light emitting diodes (OLEDs) based on one of the new emitters show a maximum external quantum efficiency (EQE) of 7.96%.
Entities:
Keywords:
Cu(I) complexes; OLED; TADF; intraligand charge-transfer; solution process
Authors: Shuyang Shi; Moon Chul Jung; Caleb Coburn; Abegail Tadle; Daniel Sylvinson M R; Peter I Djurovich; Stephen R Forrest; Mark E Thompson Journal: J Am Chem Soc Date: 2019-02-15 Impact factor: 15.419
Authors: Dongling Zhou; Wai-Pong To; Glenna So Ming Tong; Gang Cheng; Lili Du; David Lee Phillips; Chi-Ming Che Journal: Angew Chem Int Ed Engl Date: 2020-02-11 Impact factor: 15.336