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- W4229849393 abstract "We investigated the photovoltaic properties of organic multilayered photovoltaic devices consisting of Indium–tin-oxide (ITO)/oxide/tetraphenyl porphyrin (H2TPP, ZnTPP)/fullerene (C60)/bathocuproine (BCP)/Al structures. The open-circuit voltage VOC increases with the thickness of porphyrin layers between 10 and 30 nm. The upper limit of VOC is attributed to the built-in potential and the energy difference between the highest occupied molecular orbital (HOMO) of H2TPP and the lowest unoccupied molecular orbital (LUMO) of the C60 layer ΔE. The use of oxide hole collection layers, such as NiO and MoO3, is effective for increasing the built-in potential across the organic layers resulting in the improved VOC. The kink in the J–V curve observed at approximately VOC for the device with a thick H2TPP layer and the device with and without a MoOx layer is analyzed on the basis of the Poole–Frenkel and Schottky models assuming the amorphous porphyrin layers as dielectrics. The resistance of the organic layers is dominated by the field-dependent bulk resistance of H2TPP films for V<VOC, whereas the kink above VOC was attributed to the relatively high Schottky barrier for holes at the ITO/H2TPP and ITO/MoO3 interfaces." @default.
- W4229849393 created "2022-05-11" @default.
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- W4229849393 date "2011-01-01" @default.
- W4229849393 modified "2023-09-27" @default.
- W4229849393 title "Enhancement of the Open-Circuit Voltage and Hole Conduction of Tetraphenyl Porphyrin/C<sub>60</sub>Multilayered Photovoltaic Device by the Insertion of Oxide Hole Collection Layers" @default.
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- W4229849393 doi "https://doi.org/10.7567/jjap.50.01bc14" @default.
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