Photovoltaic devices with multiple junctions separated by a graded recombination layer
一种光伏、光伏结的技术，应用在光伏发电、电气元件、电固体器件等方向，能够解决光伏不相容、妨碍实施等问题
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example 1
[0086] This example illustrates the synthesis and purification of colloidal quantum dots suitable for use in the present invention.
[0087] chemical. Lead oxide (PbO) (99.9%), oleic acid (90%), bis(trimethylsilyl)sulfur (TMS, synthetic grade), octadecene-1 (90%) were obtained from Sigma-Aldrich ), 3-mercaptopropionic acid (99%), terpineol, polyethylene glycol monooctylphenyl ether (Triton-X), and all solvents (anhydrous grade). Gold (copper) sputtering target (99.99%), titanium dioxide (TiO 2 ) sputtering targets and indium tin oxide (ITO) sputtering targets. A glass substrate (Pilkington TEC15) coated with fluorine-doped tin oxide was obtained from Hartford Glass.
[0088] Colloidal quantum dot synthesis and purification. TMS (0.18 g, 1 mol) was added to octadecene-1 (10 mL) which was dried and degassed by heating in vacuo to 80 °C for 24 hours. A mixture of oleic acid (1.34g, 4.8mmol), PbO (0.45g, 2.0mmol) and octadecene-1 (14.2g, 56.2mmol) was heated in vacuo to 95°C ...
example 2
[0091] This example illustrates the optical properties of PbS colloidal quantum dot films.
[0092] After depositing each layer, a multilayer spin-coating method provided a 30 nm thick PbS colloidal quantum dot film. Fabrication of single-junction photovoltaic devices with 4-layer, 8-layer and 12-layer spin-coated PbS colloidal quantum dot films except for the gold top contact. The transmission spectra of these devices were obtained by using a UV-vis-IR (ultraviolet visible infrared) scanning spectrometer with an integrating-sphere. Transmitted light from the same device substrate was used as a reference for 100% transmittance. The transmittance of the PbS film was acquired at a wavelength of 975 nm. exist Figure 5 In , the transmittance is plotted as a function of the number of layers. The red curve shows that the experimental data represented by the black square dots conform to the optical equation Beer's law. According to the diagram, each knot is obtained. This grap...
example 3
[0094] This example illustrates the TiO 2 conductivity measurement.
[0095] The conductivity of ITO and AZO was obtained by measuring the electrical resistance of ITO and AZO films (dimensions 1 inch by 1 inch) with a thickness of 100 nm. TiO obtained by this method 2 The resistance is too high. We first deposited 30nm thick TiO on a clean substrate 2 membrane, then placed as Figure 6 Patterned Ag used as electrodes is shown. Measuring TiO between two close Ag electrodes 2 resistance of the membrane. Equation I below describes the TiO 2 resistance of the membrane. TiO 2 conductivity from Figure 4 From the inset of a.
[0096] Equation I: R=(1 / σ)·(1 / d)·(1 / W)
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