Long-lived Triplet Excitons Allowed by Intermolecular Hydrogen Bonding in Amorphous Matrix

Computational study of three dimensional potential energy surfaces in intermolecular hydrogen bonding of cis-urocanic acid

Probing long-lived dark excitons in self-assembled quantum dots

Long-lived dark exciton states are formed in self-assembled quantum dots due to the combination of the angular momentum of electrons and holes. The lifetime of dark excitons are determined by spin-flip processes that transfer dark excitons into radiative bright excitons. We employ time-resolved spontaneous emission measurements in a modified local density of optical states to unambiguously reco...

Triplet Excitons in Organic Materials

The theory of delayed fluorescence produced in an organic material by singlet excitation through an absorbing layer is given. It is shown, that it will be reduced by a factor la.2/ ( la .+ ls) 2 due to the singlet energy transfer to such a layer, where /a the penetration depth of the exciting irradiation and Zs the diffusion lenght of the singlets. Further reduction of delayed fluorescence shou...

Long-lived excitons in GaN/AlN nanowire heterostructures

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Triplet excitons in polyadenylic Acid.

1-Phenyl-2-benzoyl-8-azacycl(2.2.2)azine, VII.-Heating 450 mg of VI in a sublimation tube at 2400 caused rapid evolution of gas. The residue was taken up in a 2: 1 mixture of benzene-Skelly Solve B and chromatographed over alumina (Woelm, activity 3). The solid obtained from the first eluate fraction was recrystallized from an ether-Skelly Solve B mixture to give 312 mg of orange crystals, mp 1...