Vibronic Structure of PTCDA Stacks: Monomer-Dimer Equilibrium

1999 ◽  
Vol 598 ◽  
Author(s):  
Zoltán G. Soos ◽  
Margaret H. Hennessy ◽  
Vladimir Bulovic
Keyword(s):  
Charge Transfer ◽  
Strong Coupling ◽  
Molecular Vibration ◽  
Vibronic Structure ◽  
Crystalline Films ◽  
Charge Transfer Excitons

ABSTRACTSolution spectra of perylenetetracarboxylic dianhydride (PTCDA) show an equilibrium between monomers and dimers, with fluorescence exclusively from monomers and absorption from both. The dimer absorption follows closely the spectrum of PTCDA stacks in crystalline films, which indicate strong coupling to a molecular vibration and mixing of Frenkel and charge-transfer excitons. The same model accounts for solution spectra.

Free and Self-Trapped Charge-Transfer Excitons in Crystals of Dipolar Molecules ofN,N-Dimethylaminobenzylidene 1,3-Indandione

1998 ◽  
Vol 102 (7) ◽  
pp. 1086-1094 ◽  
Author(s):  
S. Jursenas ◽  
A. Gruodis ◽  
G. Kodis ◽  
M. Chachisvilis ◽  
V. Gulbinas ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Dipolar Molecules ◽  
Charge Transfer Excitons ◽  
Trapped Charge

Charge transfer excitons in halogen-bridged mixed valence complexes

1987 ◽  
Vol 19 (1-3) ◽  
pp. 907-910 ◽  
Author(s):  
Y. Wada ◽  
T. Mitani ◽  
M. Yamashita ◽  
T. Koda
Keyword(s):  
Charge Transfer ◽  
Mixed Valence ◽  
Charge Transfer Excitons

The Binding Energy of Charge-Transfer Excitons Localized at Polymeric Semiconductor Heterojunctions

2011 ◽  
Vol 115 (14) ◽  
pp. 7114-7119 ◽  
Author(s):  
Simon Gélinas ◽  
Olivier Paré-Labrosse ◽  
Colin-Nadeau Brosseau ◽  
Sebastian Albert-Seifried ◽  
Christopher R. McNeill ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Binding Energy ◽  
Polymeric Semiconductor ◽  
Semiconductor Heterojunctions ◽  
Charge Transfer Excitons

scholarly journals Layer-resolved many-electron interactions in delafossite PdCoO2 from standing-wave photoemission spectroscopy

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Qiyang Lu ◽  
Henrique Martins ◽  
Juhan Matthias Kahk ◽  
Gaurab Rimal ◽  
Seongshik Oh ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Standing Wave ◽  
Three Dimensional ◽  
Photoemission Spectroscopy ◽  
Electronic Coupling ◽  
Many Body ◽  
X Ray ◽  
Charge Transfer Excitons ◽  
Many Body Interactions ◽  
Electron Interactions

AbstractWhen a three-dimensional material is constructed by stacking different two-dimensional layers into an ordered structure, new and unique physical properties can emerge. An example is the delafossite PdCoO2, which consists of alternating layers of metallic Pd and Mott-insulating CoO2 sheets. To understand the nature of the electronic coupling between the layers that gives rise to the unique properties of PdCoO2, we revealed its layer-resolved electronic structure combining standing-wave X-ray photoemission spectroscopy and ab initio many-body calculations. Experimentally, we have decomposed the measured VB spectrum into contributions from Pd and CoO2 layers. Computationally, we find that many-body interactions in Pd and CoO2 layers are highly different. Holes in the CoO2 layer interact strongly with charge-transfer excitons in the same layer, whereas holes in the Pd layer couple to plasmons in the Pd layer. Interestingly, we find that holes in states hybridized across both layers couple to both types of excitations (charge-transfer excitons or plasmons), with the intensity of photoemission satellites being proportional to the projection of the state onto a given layer. This establishes satellites as a sensitive probe for inter-layer hybridization. These findings pave the way towards a better understanding of complex many-electron interactions in layered quantum materials.

Non-doped thermally activated delayed fluorescent organic light-emitting diodes using an intra- and intermolecular exciplex system with a meta-linked acridine–triazine conjugate

2018 ◽  
Vol 6 (34) ◽  
pp. 9049-9054 ◽  
Author(s):  
Seongjin Jeong ◽  
Youngnam Lee ◽  
Joon Ki Kim ◽  
Du-Jeon Jang ◽  
Jong-In Hong
Keyword(s):  
Charge Transfer ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Thermally Activated ◽  
Highly Efficient ◽  
Organic Light ◽  
Intermolecular Charge Transfer ◽  
Charge Transfer Excitons

We report new TADF molecules (AmT and AmmT) for highly efficient non-doped OLEDs utilizing intra- and intermolecular charge transfer excitons.

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