High-orientation antimony selenide thin film and preparation method therefor

Abstract

The invention belongs to the preparation fields of a photoelectric material and a thin film solar cell, and discloses a high-orientation antimony selenide thin film and a preparation method therefor, particularly an antimony selenide thin film with high orientation. The high-orientation antimony selenide thin film is a one-dimensional chain-like material; the high orientation refers to the thin film formed by the antimony selenide chin which is grown in a direction of <002>. The preparation method specifically comprises two steps of adopting a thermal evaporation method or other methods to prepare the antimony selenide thin film, and then performing a method for carrying out selenylation (sulfuration) processing. By adoption of the preparation method provided by the invention, the high-orientation antimony selenide thin film can be obtained; a more efficient antimony selenide thin film solar cell is expected to be obtained; and in addition, the preparation method is simple and feasible, and low in cost.

Description

technical field [0001] The invention belongs to the field of preparation of photoelectric materials and thin-film solar cells, and in particular relates to a highly oriented antimony selenide thin film and a preparation method thereof. Background technique [0002] Antimony Selenide (Sb 2 Se 3 ) is a very potential thin-film photovoltaic absorber material, it has a suitable band gap of 1~1.2eV, a large absorption coefficient (short-wave absorption coefficient>10 5 cm -1 ), the raw materials are non-toxic and abundant, but it was not until recent years that antimony selenide thin film solar cells began to be recorded and reported in international literature. [0003] Antimony selenide is a special ribbon material, so its mobility in each direction is significantly different, and the mobility determines the diffusion length and thus affects the current. Solar cell efficiency N=Voc*Jsc*FF, where Jsc is the current density, which is one of the important factors affecting...

AI Technical Summary

Problems solved by technology

However, the disadvantages of the technical solution of this patent document 1 are: its battery structure is very complicated, the role of antimony selenide in it is not clear and its performance has not changed significantly

However, the problem in the technical solution of this patent document 2 is: this method is a post-processing method, which is more complicated than the method for preparing antimony selenide in this paper, and the antimony selenide thin film prepared by this method cannot have the favorable Orientation

Images