Observation of long-lived room temperature phosphorescence from exciplex in organic metal-free materials

POSTER

Abstract

Long-lived room temperature phosphorescence (RTP) from metal-free organic material system is very rare because the intersystem crossing rate in organic molecules is very small, and long-lived excited triplet states are easily quenched by oxygen and thermal perturbations. This research presents an intense long-lived RTP from exciplex formation, for a given organic materials system, in the absence of phosphorescence protector or stabilizer. Our experimental observation indicates that such exciplex is resistant to oxygen quenching and can be obtained easily by grinding the powders of given materials. Our approach demonstrates, for the first time to our knowledge, a low cost and efficient route to obtaining long-lived RTP in organic materials.

Authors

  • Tianlei Zhou

    Univ of Nevada - Reno

  • V.V. Shlyaptseva

    California State University, Dominguez Hills, Univ of California - Irvine, University of Chicago, UC Merced, NINT, Dublin Institute of Technology, Ireland, MIT, NASA/GSFC, CRESST/UMBC \& NASA/GSFC, LLNL, MPI for Plasma Physics, Remeis-Sternwarte/ECAP/FAU, Humboldt State University, University of Nevada Reno, The University of Michigan, University of Nevada, Reno, Lawrence Livermore National Laboratory, Sandia National Laboratories, Los Alamos National Laboratory, Laboratory for Laser Energetics, University of Rochester, Univ of Nevada - Reno, University of Nevada, Reno - Physics Department, Jilin University, China, Department of Physics, University of California, Berkeley, Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Advanced Materials Laboratory, National Institute for Materials Science, Department of Physics \& Astronomy, California State University, Long Beach, CA 90840, UC Santa Barbara, Department of Physics and Astronomy, University of California, Riverside, University of California at Merced, Laboratoire de Physique des Plasmas (CNRS/Ecole Polytechnique/UPMC/Universit\'e Paris Sud), Ecole Polytechnique, 91128 Palaiseau, France, University of Nevada, Reno, NV 89557, USA, University of Nevada, Reno, NV 89557 USA, University of Nevada-Reno

  • Ghassan Jabbour

    Univ of Nevada - Reno