SEARCH Articles Figures Tables Calculated first singlet excitation energy Energy level diagram first excited singlet state Energy level diagram second singlet excited state Energy singlet Excitation energy Excitation energy of singlet Excited Singlet Energy Transfer and Migration Excited singlet Excited singlet energy transfer event Excited singlet state energy Morphology Dependence of Excited Singlet Energy Transfer Events Potential energy functions first excited singlet state Singlet and triplet excitation energies Singlet excitation Singlet excitation energy transfer The Lowest Energy Excited Singlet State Theory and Experiment of Singlet Excitation Energy Transfer in Mixed Molecular Crystals