Organic thin-film solar cell
A solar cell and organic thin film technology, applied in the field of organic thin film solar cells, can solve problems such as inability to achieve high conversion efficiency, influence of organic thin film properties, and high evaporation temperature
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Embodiment 1
[0112] A 25mm×75mm×0.7mm thick glass substrate with an ITO transparent electrode (the transmittance is more than 60% for light with a wavelength of 300-800nm) is ultrasonically cleaned in isopropanol for 5 minutes, and then implemented for 30 minutes UV ozone cleaning. Install the cleaned glass substrate with transparent electrode lines on the substrate holder of the vacuum evaporation device, on the surface of the side where the transparent electrode lines as the lower electrodes are formed, vapor-deposit compound 1 by resistance heating to cover the transparent electrode lines. by way of electrodes Film formation was performed to form a p-layer with a film thickness of 30 nm. Then, resistive heating evaporated fullerene (C 60 ),by For film formation, an n layer with a film thickness of 60 nm was formed on the p layer. BCP was vapor-deposited by resistance heating to form a buffer layer with a film thickness of 10 nm on the n layer, and then metal Al was vapor-deposited...
Embodiment 2～7 and comparative example 1～3
[0122] Organic solar cells were fabricated and evaluated in the same manner as in Example 1, except that an organic compound shown in Table 1 was used instead of Compound 1 to form a p layer and an organic layer was formed at a composition ratio shown in Table 1. The results are shown in Table 1.
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[0124] [Table 1]
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[0126] It can be clearly seen from Table 1 that the conversion efficiency changes greatly when ΔAf is 0.5eV and 2eV as the boundary, and in the region of 0.5<ΔAf<2.0eV, the organic thin film solar cell has high conversion efficiency.
Embodiment 8～14 and comparative example 4
[0128] Except for using the compounds shown in Table 2 instead of Compound 1, the p-layer was formed at the vapor deposition temperature shown in Table 2, and the area was set to 0.5 cm 2 Except for this, ten organic thin-film solar cells were produced in the same manner as in Example 1.
[0129] Under AM1.5 conditions (incident intensity (Pin) is 100mW / cm 2 ) I-V characteristics were measured for the fabricated 10 organic thin film solar cells. The I-V characteristic curve of the organic thin film solar cell obtained in its result is for example such as image 3 The case shown with a linear characteristic passing through the origin is defined as a short circuit of the organic thin film solar cell. The results are shown in Table 2.
[0130] [Table 2]
[0131] [Table 2]
[0132]
[0133] As can be seen clearly from Table 2, compared with the case where the organic compound constituting the p layer is copper phthalocyanine belonging to a metal complex (Comparative Exampl...
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