Al_2O_3微粒子を用いた光閉じ込め構造を有するa-Si太陽電池の作製

概要

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The development of the high-efficiency a-Si:H solar cells has been achieved, fabricating the light trapping structures by the use of Al2O3 fine particles. As a result of the inserting the Al2O3 fine particles between the a-Si:H and the Ag back electrodes, the remarkable increase in the short circuit photocurrent density Jsc was achieved while no significant change was observed both in the open circuit voltage Voc and the fill factor. Observation of quantum efficiency spectra for the solar cells with Al2O3 particles indicates that this increase in the photocurrent density is due to the improvement of the sensitivity in the long wavelength regime (570-750 nm). It is concluded that Al2O3 particles cause random reflection of incident light at the interface, leading to an increase in the optical path.
日本真空協会の論文
2007-08-20