Beilstein J. Nanotechnol.2018,9, 721–739, doi:10.3762/bjnano.9.67
ratio (3:0, 3:1, 3:2, 3:3) showed a lower energy gap and HOMO–LUMOenergylevels compared to pure TiO2. This implies that TiO2 provides not only a larger surface area for sensitizer adsorption and good electron collection, but also causes a shift of the imine energy levels resulting from intermolecular
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Figure 1:
(a) Adsorption and desorption N2 isotherms of TiO2 at liquid nitrogen temperature. (b) Pore size di...
Beilstein J. Nanotechnol.2015,6, 1107–1115, doi:10.3762/bjnano.6.112
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Keywords: charge carrier mobility; HOMO–LUMOenergylevels; photophysical characterization; TFT devices; tris-(1-oxo-1H-phenalen-9-olate)aluminum(III); Introduction
Since the field of organic electronics has emerged, interest in organic semiconductors (OSCs) has substantially increased [1]. The efficiency
experiment.
Discussion
The initial estimate, which due to the extended aromatic system of the ligand Al(Op)3 should be characterized by lower HOMO/LUMOenergylevels as compared to Alq3, has been proven by experimental and theoretical methods. The HOMO/LUMOenergylevels of Al(Op)3 are: −5.93 and −3.26 eV
experimental, −5.71 and −2.42 eV theoretical in vacuum and −5.41 and −2.22 eV theoretical in the assumed amorphous film. The HOMO/LUMOenergylevels of Alq3 are: −5.83 and −3.01 eV experimental, −5.14 and −1.91 eV theoretical in vacuum and −5.07 and −1.80 eV theoretical in the assumed amorphous film. As a
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Figure 1:
Tris(1-oxo-1H-phenalen-9-olate)aluminum(III) (Al(Op)3) structure. H atoms are omitted for clarity.