3results about How to "Reduce compound rate" patented technology

The application discloses a perovskite solar cell electron transport layer and a preparation method and application thereof, and relates to the technical field of solar cell preparation. The method comprises the following steps: adding O-phospho-L-threonine into a SnO2 colloidal aqueous solution, and performing ultrasonic treatment to obtain a PT-doped SnO2 solution; and coating the PT-doped SnO2 solution onto the surface of a substrate to form a perovskite solar cell electron transport layer. The unique molecular structure of O-phospho-L-threonine (PT) is utilized to realize a multiple synergistic modification effect, and the device performance is improved. The preparation process is simple. The application solves the problems of the existing perovskite solar cell, such as many defects of the electron transport layer, poor interface energy level matching, serious charge recombination and poor device stability.

This application relates to the photovoltaic field, providing a solar cell, a photovoltaic module, and a method for fabricating a solar cell. The solar cell includes: a substrate having a front side and a back side, the back side including a textured region and a flat region adjacent to the textured region, the textured region having a doped surface field, and the doped surface field containing a doped element, which is N-type or P-type; a tunneling dielectric layer located on the flat region of the back side of the substrate; a doped conductive layer located on the surface of the tunneling dielectric layer away from the back side of the substrate, the doped conductive layer containing a doped element, the type of which is the same as the type of which is doped in the doped surface field; and a back electrode, a portion of the bottom surface of the back electrode located within the doped conductive layer and in contact with the doped surface field, which can at least reduce the contact resistance of the solar cell.

The application relates to the technical field of solar cells, and provides a back contact cell, a cell assembly and a photovoltaic system. In the back contact cell, a groove is formed on a third region of a silicon substrate, the groove further comprises a first connecting region between the groove and a first region, a first doped layer is located on the first region, a second doped layer is located on a second region, and a third doped layer is located on the first connecting region. The third doped layer comprises a first body part and a first transition part between the first body part and the first doped layer and the first body part and the first doped layer. The doping concentration of a first doped element in the first doped layer is greater than or equal to 100 times the doping concentration of the first doped element in the first body part. In this way, the carrier recombination rate of the region near the groove can be reduced while achieving an excellent insulation isolation effect, the surface recombination loss is reduced, and the efficiency of the back contact cell is improved.