What are the electrode materials of solar cells?
What are the electrode materials of solar cells?
Solar cells are devices that directly convert light energy into electrical energy through the photoelectric effect or photochemical effect. The cyanine film type solar cells that work with the photoelectric effect are the mainstream, while the type solar cells that work with the photochemical effect are still in their infancy. Sunlight shines on the semiconductor p-n junction to form new hole-electron pairs. Under the action of the p-n junction electric field, holes flow from the n region to the p region, and electrons flow from the p region to the n region. When the circuit is connected, current is formed. This is the working principle of the photoelectric effect solar cell.
Solar cells can be divided into two categories according to the crystal state: crystalline thin film type and non-crystalline film type (hereinafter referred to as a-), and the former is divided into single crystal type and polycrystalline type.
According to the material, it can be classified into silicon thin film type, compound semiconductor thin film type and organic thin film type. Compound semiconductor thin film type is further divided into amorphous type (a-Si:H, a-Si:H:F, a-SixGel-x:H, etc.), IIIV group (GaAs, InP), IIVI group (cds series) and zinc phosphide (Zn3P2), etc. The table below lists the classification and uses of various types of solar cells.