Antimicrobial Drug Levofloxacin Applied to an Organic Light-Emitting Diode

作者：Miao Yan-Qin; Gao Zhi-Xiang; Wu Yu-Ling; Du Xiao-Gang; Li Yuan-Hao; Liu Hui-Hui; Jia Hu-Sheng; Wang Hua^*; Liu Xu-Guang

来源：Acta Physico - Chimica Sinica, 2015, 31(3): 552-558.

DOI：10.3866/PKU.WHXB201501051

• Organic light-emitting diode
• Levofloxacin
• Blue-light emitting material
• Electron transport material
• Electroluminescence spectrum
• Electroluminescence performance

Levofloxacin (LOFX) is a well- known and inexpensive antimicrobial drug that can be easily synthesized and purified. We report the first application of LOFX to an organic light emitting diode (OLED). Its thermal and photophysical properties were thoroughly investigated using thermogravimetric analysis (TGA), UV-Vis absorption spectra, emission spectra, and cyclic voltammetry. LOFX has HOMO and LUMO energies of -6.2 and -3.2 eV, respectively, and high molecule decomposition temperature (T-d) of 327 degrees C. An OLED with a LOFX emitter shows electroluminescence (EL) at 452 nnn and maximum luminance of 2315 cd.A(-1), which can be used in a white OLED. To investigate the electron transporting ability of LOFX, an electron-carrier only OLED was made. In addition, a green OLED based on Ir(ppy)(3) (fac-tris(2- phenylpyridine)iridium) with electron transporting layer of LOFX was made, comparing with that with electron transporting layer of tris(8-hydroxyquinoline) aluminum (Alq(3)). The former exhibited higher device efficiencies than that of the latter. The results show that LOFX has a higher electron transport ability than Alq(3).

• 出版日期2015-3-15
• 单位山西大同大学; 太原理工大学