6 results about "Cdte solar cell" patented technology

The invention relates to the technical field of power generation glass, and discloses VO2 cadmium telluride composite intelligent power generation glass and a preparation method thereof. The power generation glass comprises a transparent glass substrate; the FTO front electrode layer is deposited on the glass substrate; the VO2 nano dot array is formed on the FTO front electrode layer; the CdSe window layer is deposited on the VO2 nano dot array; the CdTe absorption layer is deposited on the CdSe window layer, and the CdTe absorption layer is etched to form a suede structure; the ZnTe: Ag: Cu back contact layer is deposited on the CdTe absorption layer; the ITO or metal back electrode layer is deposited on the back contact layer; the VO2 cadmium telluride composite intelligent power generation glass is divided into sub-cell units through laser etching. Based on the working principle of a CdTe solar cell and the application of a VO2 material, the technical bottleneck of the photovoltaic glass in the fields of dynamic dimming and high-temperature efficiency maintenance is solved through the intelligent phase change of the VO2 nanodot array and CdTe energy band engineering, and a standardized solution is provided for a next-generation intelligent photovoltaic device.

This invention belongs to the field of solar cell technology and discloses a tandem solar cell of zinc-cadmium telluride (CdTe) and perovskite. It employs a CdTe solar cell as the top cell and a narrow-bandgap perovskite solar cell as the bottom cell, improving device stability while maintaining high efficiency. By stacking two solar cells with different optical bandgapes, they exhibit different spectral responses to light absorption, fully utilizing light energy and improving photoelectric conversion efficiency. Using stable wide-bandgap CdTe as the absorber layer material of the top cell replaces the unstable wide-bandgap perovskite material, thereby improving the overall stability of the solar cell, achieving higher efficiency, and extending cell lifespan.

Method for manufacturing a CdTe solar cell, comprising the steps: a) Providing a semi-finished CdTe solar cell (10) comprising at least a transparent substrate, a front contact layer, a CdS layer and a CdTe layer, wherein a surface of the CdTe layer opposite the transparent substrate forms a first surface of the semi-finished CdTe solar cell (10), b) Applying an aqueous solution (20) comprising metal ions or metal-containing ions to a back side (11) of the semi-finished CdTe solar cell (10), c) Removing the aqueous solution (20) from the back (11) of the semi-finished CdTe solar cell (10), d) Applying a metal layer to the first surface of the semi-finished CdTe solar cell (10), and e) additionally applying electrical energy to the semi-finished CdTe solar cell (10) by electrically connecting it to an electrical power supply (140), wherein the back side (11) of the semi-finished CdTe solar cell (10) is either the first surface of the semi-finished CdTe solar cell (10) or a first surface of the metal layer facing the transparent substrate, wherein step e) is carried out for a first period (t1) of the time during which the aqueous solution (20) is present on the back side (11) of the semi-finished CdTe solar cell (10).

The present invention provides a large-area CdTe solar cell module and a manufacturing method thereof, comprising: providing a transparent flexible substrate coated with an aluminum film, etching the aluminum film into bottom electrode circuits of multiple units through a roll-to-roll etching process, wherein the bottom electrode circuit of each unit includes an edge main grid line and an internal fine grid line; forming multiple through holes, depositing a conductive material in the through holes to form a back electrode; depositing a transparent oxide bottom electrode layer, a window layer, a buffer layer, a CdTe light absorption layer, a back contact layer and a front electrode layer; printing a top electrode grid line; cutting into multiple separated CdTe solar cell units; and bonding with a conductive adhesive to form a CdTe solar cell module in series. The aluminum film and bottom electrode circuit process of the present invention is suitable for continuous production in a roll-to-roll manner, and then a flexible component is formed by cutting and stacking. The shape and size of the single cell can be designed through the etching circuit, and the component area and shape design are highly flexible, and zero "dead zone" can be achieved.

The invention provides a method for improving the performance of a CdTe solar cell device, which is characterized in that an Al2O3 layer is introduced into the back interface of a CdTe solar cell, and the method comprises the following steps: preparing a CdTe film semi-finished product; the CdTe thin film semi-finished product comprises a conductive substrate, and an electron transport layer and a CdTe absorption layer which are sequentially deposited on the conductive substrate; preparing an Al2O3 diluent; the CdTe absorption layer of the CdTe thin film semi-finished product is coated with the Al2O3 diluent in a spinning mode; then placing the CdTe thin film on a heating stage with the temperature of 100-200 DEG C for annealing to obtain a CdTe thin film structure covered with a thin layer of Al2O3; a back contact material is deposited on an Al2O3 layer of a CdTe thin film structure, and then a metal electrode layer CdTe solar cell is evaporated through thermal evaporation. According to the method for improving the performance of the CdTe solar cell device, the open-circuit voltage, the short-circuit current and the conversion efficiency of the cell are effectively improved by using the Al2O3 layer. The invention further provides a method for improving the performance of the CdTe solar cell device.

The invention discloses an application of a silver nanowire in preparation of a cadmium telluride solar cell back contact layer. According to the scheme provided by the invention, the silver nanowire has a relatively high work function, so that the silver nanowire and the p-type CdTe absorption layer form low-resistance and stable ohmic contact, and the interface potential barrier of carrier transmission is effectively reduced. Compared with the traditional back contact material, the high-cost magnetron sputtering equipment does not need to be adopted, so that the cost is obviously reduced; and meanwhile, excessive diffusion of copper atoms in the CdTe layer is avoided due to the characteristic of the one-dimensional nano structure, so that the problems of cell performance degradation, low conversion efficiency of the solar cell, poor stability and the like caused by out-of-control copper doping are avoided. The back contact layer material prepared by using the silver nanowires significantly improves the photoelectric conversion efficiency and long-term stability of the CdTe solar cell.