A green emitting phosphorescent copper(I) complex with tetrazole derived ligand for electroluminescence application

作者：Tong Senmiao; Yuan Donglin; Yi Lita^*

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2014, 130: 280-286.

DOI：10.1016/j.saa.2014.04.008

• Copper(I) complex
• Green emitting
• Photoluminescence
• Electroluminescence
• Electron donor/acceptor

In this paper, a tetrazole derived diamine ligand of 2-(1H-tetrazol-5-yl)pyridine (TP) owing electron-donors and short conjugation chain was synthesized to increase the band gap of its corresponding phosphorescent Cu(I) complex. This Cu(I) complex was characterized in detail, including its single crystal structure, singlet electronic transitions, photophysical parameters, thermal stability and electrochemical property. Upon on photoexcitation, this Cu(I) complex emitted green emission peaking at 497 nm with biexponential decay pattern of tau(1) = 5.5414 mu s (A(1) = 0.137) and tau(2) = 1.0679 mu s (A(2) = 0.11503). Cyclic voltammerty experiment suggested that this Cu(I) complex owned HOMO and LUMO energy levels of -5.79 eV and -2.39 eV. The thermal decomposition temperature was 170 C as indicated by thermogravimetric analysis. The optimal electroluminescence device constructed by solution processed coating procedure showed green electroluminescence peaking at 525 nm, with maximum luminance of 2860 cd/m(2) and maximum current efficiency of 5.9 cd/A.

• 出版日期2014-9-15
• 单位浙江农林大学