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Electronic and Photovoltaic Properties of p-Si/PCBM:MEH-PPV Organic-Inorganic Hybrid Photodiode

100%
Yakuphanoglu F., Farooq W.
Acta Physica Polonica A
|
2011
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vol. 119
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issue 6
890-894
EN
The photovoltaic and electronic properties of p-Si/poly[2-methoxy,5-(2-ethyl-hexyloxy)-1,4-phenylenevinylene] (MEH-PPV):[6, 6]-phenyl C_{61}-butyric acid methyl ester (PCBM) organic-inorganic device have been investigated. The current-voltage characteristic of p-Si/PCBM:MEH-PPV photodiode includes series resistance effect and the diode indicates a non-ideal behavior. The photovoltaic effect in p-Si/PCBM:MEH-PPV photodiode is based on the formation of excitons and subsequent dissociation and charge collection at the electrodes. It is evaluated that p-Si/PCBM:MEH-PPV device is a photodiode with V_{oc} of 84 mV and I_{sc} of 3.47 nA electronic parameters.
2
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Thermal Annealing Effect on the Morphology of Inkjet Printed Polymer:Fullerene Composites Solar Cells

100%
Fauzia V., Umar A., Salleh M., Yahaya M.
Acta Physica Polonica A
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2012
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vol. 121
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issue 1
155-157
EN
One of critical factor in determining the performance of solar cells is the morphology of the active layer. The drying process of the active layer prepared by inkjet printing technique plays a key role in obtaining high quality surface morphology. This paper reports the effect of thermal annealing on the morphology of printed active layer. The printed active layer is a blend of poly(3-octylthiophene-2,5-diyl) and (6,6)-phenyl C_{71} butyric acid methyl ester dissolved in a mixture of dichlorobenzene:mesitylene. The printed films were then annealed at three different temperatures, namely 120, 140, and 160C for 60 min to obtain the best performance of solar cells. It was found that the performance of solar cells strongly depends on the annealing temperature. The devices with the active layer annealed at 140C exhibits the highest performance with short circuit current density and open circuit voltage as high as 2.88 μA/cm^2 and 0.85 V, respectively. The effect of annealing on the properties of printed active layer will be discussed.
3
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Light-Harvesting in Photosynthesis

80%
Scheer H.
Acta Physica Polonica A
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2012
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vol. 122
|
issue 2
247-251
EN
A brief survey is given on the elementary reactions of photosynthesis, with an emphasis on the functional separation into reaction centers that perform, after excitation, an ultrafast charge separation across the photosynthetic membrane, and light-harvesting complexes that absorb light and transfer the excitation energy to the reaction centers. The basic concepts are compared to those of photovoltaics.
4
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Mott-Schottky Analysis of the P3HT:ZnS_{cubic} and P3HT:ZnS_{hexa} Bulk Heterojunction Solar Cells

51%
Abdul Kareem T.
Acta Physica Polonica A
|
2016
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vol. 129
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issue 3
409-413
EN
Bulk heterojunction solar cells of sphalerite and wurtzite ZnS incorporated P3HT were fabricated and their Mott-Schottky analysis was performed to find the conduction mechanism of the devices. The analysis shows the formation of a Schottky junction and band unpinning at the P3HT:ZnS-Al contact and it confirms the hole conductivity in the active material.
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