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High Luminescence Gold( I ) and Copper( I ) Complexes with a Triplet Excited State for Use in Light‐Emitting Diodes
Author(s) -
Ma Yuguang,
Che ChiMing,
Chao HsiuYi,
Zhou Xuemei,
Chan WingHan,
Shen Jiaocong
Publication year - 1999
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/(sici)1521-4095(199907)11:10<852::aid-adma852>3.0.co;2-r
Subject(s) - electroluminescence , excited state , materials science , singlet state , luminescence , triplet state , singlet fission , photochemistry , exciton , oled , copper , excimer , photoluminescence , optoelectronics , atomic physics , fluorescence , nanotechnology , chemistry , condensed matter physics , layer (electronics) , physics , optics , metallurgy
Electroluminescence (EL) from the triplet excited state would extend the range of EL materials able to be used as the emitting layer of organic EL devices from traditional singlet materials to triplet materials such as transition metal complexes. In the EL spectra reported here for highly luminescent gold( I ) and copper( I ) complexes, the triplet emission intensity is enhanced, while the singlet emission becomes a weak shoulder. This suggests that EL from the triplet state has a larger quantum efficiency than that from the singlet excited state. The bimolecular reaction between triplet excitons is discussed.