Abstract: An in-situ flash evaporation film forming apparatus for a perovskite solar cell includes a platform; a substrate disposed on the platform and configured to form a film layer; and a cavity cover movably disposed up and down on the platform, and being able to enclose the substrate into a closed cavity surrounded by the cavity cover and the platform, a vacuum pipe being disposed on the cavity cover and being able to communicate the closed cavity with a vacuum pump.

Abstract: A zinc magnesium oxide material includes at least two composite thin film layers. An atomic ratio of Zn element to Mg element in each of the at least two composite thin film layers is different from an atomic ratio of Zn element to Mg element in each of at least one remaining composite thin film layer of the at least two composite thin film layers.

Abstract: The present disclosure provides a preparation method of a thin film solar battery, including the following steps: a) performing a first etching of the back electrode layer to form a plurality of first grooves; b) forming an insulator in each of the plurality of first grooves, thereby forming a plurality of insulators; c) forming a light absorption layer and a buffer layer sequentially on a surface of the back electrode layer, performing a second etching of the light absorption layer and the buffer layer to form a plurality of second grooves; and d) forming an upper electrode layer on a surface of the buffer layer, the upper electrode layer extending to the plurality of second grooves, and performing a third etching of the upper electrode layer, the buffer layer, and the light absorption layer to form a plurality of third grooves passing through the upper electrode layer, the buffer layer, and the light absorption layer, so as to obtain a plurality of serially connected battery cells.

Abstract: A thin film solar cell, including a substrate and a plurality of cell units disposed on the substrate, each cell unit includes a back electrode layer, a light absorbing layer, a buffer layer, and an upper electrode layer which are sequentially disposed. A first groove throughout the back electrode layer is disposed between the back electrode layers of any two adjacent cell units; the first groove is filled with an insulating portion. A second groove throughout the light absorbing layer and the buffer layer is disposed in each cell unit, the upper electrode layer of this cell unit extends to the second groove of this cell unit to contact the back electrode layer of the other cell unit of the two adjacent cell units. A third groove is disposed between the two adjacent cell units, the third groove insulate the upper electrode layers of the two adjacent cell units.

Abstract: The present disclosure relates to a thin film solar cell and a method for making the same. The thin film solar cell comprises a substrate and a back electrode layer, a light absorbing layer, a buffer layer, a window layer and an upper electrode disposed on the substrate; and a surface of the light absorbing layer comprises a light trapping structure.