Program, May 10, 11, 12, 1965

absorption spectrum acceptor activation energy annealing anthracene anthracene crystals applied voltage approximately aromatic benzene benzophenone biphenyl calculated cell charge carriers charge-transfer Chem Choi cobaltocene complex component concentration conduction band coronene crystal thickness curve decay defects delayed fluorescence density diffusion diph donor dopant doped crystals doublet durene effect electrical electrons and holes emission energy transfer equation excited experimental ferrocene Figure film fluorescence guest molecules illumination impurity indicate injected intensity interaction iodine ionization Jortner lattice light magnitude measured mobility Molecular Crystals molecules naphthalene negative observed optical orbital organic crystals out-of-plane oxygen peaks pentacene perylene phen-d phenanthrene phosphorescence photoconductive photocurrent photoelectric photon photovoltage phthalocyanine Phys polarization pulse pyrene QUANTUM YIELD region resistivity room temperature sample semiconductors single crystals singlet solid solution spectra structure surface TCNE TCNQ temperature dependence tetracene TMPD transition traps triphenylene triplet excitons University vibrational wavelength