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- W2605734905 abstract "On the basis of a photon-assisted high frequency capacitance–voltage (C–V) method (1 MHz C–V), an effective approach is developed to evaluate the average interface state density (Dit) of an ITO–SiOx/n-Si heterojunction structure. Tin-doped indium oxide (ITO) films with different thicknesses were directly deposited on (100) n-type crystalline silicon by magnetron sputtering to fabricate semiconductor–insulator–semiconductor (SIS) hetero-interface regions where an ultra-thin SiOx passivation layer was naturally created. The morphology of the SiOx layer was confirmed by X-ray photoelectron spectroscopy depth profiling and transmission electron microscope analysis. The thinness of this SiOx layer was the main reason for the SIS interface state density being more difficult to detect than that of a typical metal–oxide–semiconductor structure. A light was used for photon injection while measuring the C–V of the device, thus enabling the photon-assisted C–V measurement of the Dit. By quantifying decreases of the light-induced-voltage as a variation of the capacitance caused by parasitic charge at interface states the passivation quality within the interface of ITO–SiOx/n-Si could be reasonably evaluated. The average interface state density of these SIS devices was measured as 1.2–1.7 × 1011 eV−1 cm−2 and declined as the passivation layer was made thicker. The lifetime of the minority carriers, dark leakage current, and the other photovoltaic parameters of the devices were also used to determine the passivation." @default.
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- W2605734905 date "2017-09-01" @default.
- W2605734905 modified "2023-10-04" @default.
- W2605734905 title "A concise way to estimate the average density of interface states in an ITO–SiO x /n-Si heterojunction solar cell" @default.
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- W2605734905 doi "https://doi.org/10.1016/j.apsusc.2017.04.122" @default.
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