Stannite structure Cu2FeSnSe4 powder material and liquid phase preparation method thereof

Abstract

The invention discloses a kesterite structure Cu for solar photovoltaic cells 2 FeSnSe 4 A powder material and a liquid phase preparation method thereof, comprising the steps of: making the raw material CuCl 2 2H 2 O, FeCl 3 ·6H 2 O, SnCl 4 ·5H 2 O. The selenium powder is weighed by molar ratio and put into a three-necked round-bottomed flask for mixing, and then an organic solvent triethylenetetramine solution is added to obtain a uniform light blue solution; nitrogen is used as a protective gas and placed in a constant temperature oil bath Heated to 200-230°C in medium temperature and kept for 0.5-12 hours, then cooled to room temperature naturally; washed with absolute ethanol and distilled water in sequence, then filtered and dried to obtain a black powder. The kesterite structure Cu 2 FeSnSe 4 The liquid-phase preparation method of powder materials is green and pollution-free, the reaction time is short, the required temperature is low, the operation is simple, the cost is low, and it is suitable for Cu 2 FeSnSe 4 Powder materials are used in the industrialization of photovoltaic cell absorber layers.

Description

technical field [0001] The invention belongs to the technical field of materials for solar photovoltaic cells, in particular to a kesterite structure Cu 2 FeSnSe 4 Powder material and liquid phase preparation method thereof, the kesterite structure Cu 2 FeSnSe 4 Powder material applied to Cu 2 FeSnSe 4 Thin-film solar cell absorber layer. Background technique [0002] With the gradual depletion of non-renewable resources, the energy crisis and the ensuing environmental pollution are becoming more and more serious. As a clean renewable energy source, solar energy is non-toxic, harmless and non-polluting, and it is the best solution for people to solve energy and environmental problems. good choice. In the process of industrialization today, photovoltaic modules have been widely used, and the process route is relatively mature. The main problems of current photovoltaic power generation are focused on improving the photoelectric conversion efficiency of solar cells and re...

AI Technical Summary

Problems solved by technology

However, CIGS thin-film solar cells have the problem of scarcity of indium (In) and gallium (Ga) elements, and have complex element ratios and multi-layer structures, which have strict requirements on process, equipment and technical difficulty, which limit CIGS thin-film solar cells. Industrialization of solar cells

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