Abstract: A trench scribing apparatus and a trench scribing method adapted to scribe a trench on a substrate are provided. The apparatus includes a platen, a guide rod structure, a supporting carrier and a pin device. The guide rod structure is disposed above the platen. The supporting carrier is fixed on the guide rod structure, and the substrate is disposed on the supporting carrier. The pin device is disposed above the supporting carrier and includes a pin holder and a plurality of pins fastened on the pin holder, and the pins are arranged into at least one straight line.

Abstract: The invention provides a solar cell. The solar cell has the following structures: a substrate; a first electrode formed on the substrate; a light absorbing layer formed on the first electrode, wherein the light absorbing layer includes a first compound thin film and a second compound thin film, and a band gap of the second compound thin film is larger than that of the first compound thin film; a buffer layer formed on the light absorbing layer; a transparent conducting layer formed on the buffer layer; and a second electrode formed on the transparent conducting layer.