| 摘要 |
PURPOSE:To obtain an efficient solar battery by forming thin N type or P type film on the front and back surfaces of a thick N type or P type film and creating electromotive force between both layers. CONSTITUTION:P type layers 1 of approx. 1mum are formed on the front and back surfaces of an N type layer 2 having a thickness of approx. 400mum. An N<+> type layer 3 for ohmically connected in a spot state is formed on both side ends of the layer 2 of the back surface, connected in parallel with leads 5 as a negative electrode. Electrodes 4 are attached onto the P type layer 1 of the front and back surfaces, and connected in parallel with each other by the leads 5. When solar light is incident from one side, electron and hole paris are produced by short wavelength by the P-N junctions at the light receiving side, the holes are collected to the layer 1 in the vicinity of the light receiving surface, and the electrons are collected to the layer 3 under the layer. Electron and hole paris are produced at the P-N junction in the deep position with the long wavelength, the holes are collected to the layer 1, and the electrons are collected to the layer 3, thereby creating the electromotive force between the layers 1 and 2. According to this structure, the long wavelength light which is not therefore used can also be used, thereby improving the efficiency. |
