Abstract: A transparent solar cell module is provided. The transparent solar cell module includes a transparent substrate, a first transparent electrode on the transparent substrate, a p-type layer on the first transparent electrode, an intrinsic layer on the p-type layer, an n-type stacked layer on the intrinsic layer, and a second transparent electrode on the n-type stacked layer. The n-type stacked layer includes at least two n-type material layers with different refractive indexes.

Abstract: A solar cell having a reflective structure is provided, which includes a front contact, a P layer, an I layer, an N layer, and a back contact that are stacked together. The solar cell having the reflective structure is characterized in that the N layer is a layer of low refraction index, and a refraction index of the layer of low refraction index is lower than that of the I layer. Furthermore, the N layer may be a multi-layer structure consisting of several films in which films with low refraction indexes and films with high refraction indexes are stacked alternately. The film in contact with the I layer in the multi-layer structure is a film of low refraction index. A refraction index of the film of low refraction index is lower than that of the I layer.

Abstract: A transparent solar cell module including a transparent solar cell and an optical transparent substrate is provided. The optical transparent substrate includes an optical filter and a first transparent substrate. The transparent solar cell includes a first electrode, a photoelectric conversion layer, a second electrode, and a second transparent substrate in sequence.

Abstract: A transparent solar cell module including a transparent solar cell and an optical filter is provided. The transparent solar cell includes a transparent substrate and a transparent solar cell part located on a first surface of the transparen substrate. The optical filter is located on the transparent solar cell.

Abstract: A needle protection device includes a U-shaped first part for clamping a hose connected to the needle, and a second part connected to the first part. The body of a fluid or blood access device is inserted through the first part and two wings on the body are mounted on two sidewalls of the second part. Each of the sidewalls has a protrusion portion, a slide surface extending from the protrusion portion and a raised wall which is connected to the first end of the first part. A tunnel member extends from an inside of the second part and is located between the two sidewalls. The needle is oriented downward when the wings contact the raised walls and easily inserted beneath the tunnel member.