Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (3): 552-558.doi: 10.3866/PKU.WHXB201501051

• PHOTOCHEMISTRY AND RADIATION CHEMISTRY • Previous Articles     Next Articles

Antimicrobial Drug Levofloxacin Applied to an Organic Light-Emitting Diode

MIAO Yan-Qin1,3, GAO Zhi-Xiang2, WU Yu-Ling1,3, DU Xiao-Gang1,3, LI Yuan-Hao1,3, LIU Hui-Hui1,3, JIA Hu-Sheng1,4, WANG Hua1,3, LIU Xu-Guang5   

  1. 1. Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, P. R. China;
    2. School of Physical Science and Electronics, Shanxi Datong University, Datong 037009, Shanxi Province, P. R. China;
    3. Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, P. R. China;
    4. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China;
    5. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
  • Received:2014-10-27 Revised:2015-01-04 Published:2015-03-06
  • Contact: JIA Hu-Sheng, WANG Hua E-mail:jia_husheng@126.con;
  • Supported by:

    The project was supported by the Program for New Century Excellent Talents in University of Ministry of Education of China (NCET-13-0927), International Science & Technology Cooperation Program of China (2012DFR50460), National Natural Science Foundation of China (61307029, 21101111), and Shanxi Provincial Key Innovative Research Team in Science and Technology, China (2012041011).


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 (Td) of 327 ℃. An OLED with a LOFX emitter shows electroluminescence (EL) at 452 nm 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 (Alq3). The former exhibited higher device efficiencies than that of the latter. The results show that LOFX has a higher electron transport ability than Alq3.

Key words: Organic light-emitting diode, Levofloxacin, Blue-light emitting material, Electron transport material, Electroluminescence spectrum, Electroluminescence performance