A method for surface passivation to prepare antimony sulfide-based thin film solar cells

Abstract

The invention discloses a method for preparing antimony sulfide-based thin-film solar cells by surface passivation, by introducing antimony trichloride inorganic salt and applying it in post-treatment of antimony sulfide thin films to achieve the purpose of suppressing battery interface defects. This treatment method effectively passivates the defect states on the surface of the antimony sulfide film, inhibits carrier recombination, and allows holes to tunnel to the hole transport layer while blocking electrons; at the same time, the passivation treatment method has low energy consumption and short time. It is beneficial to further improve the energy conversion efficiency of the antimony sulfide-based thin film solar cell. The invention forms a layer of antimony trichloride inorganic salt passivation layer on the surface of the antimony sulfide film, passivates the defects on the surface of the antimony sulfide, inhibits the carrier recombination, improves the carrier transmission, and significantly improves the performance of the antimony sulfide-based film. Open circuit voltage, short circuit current density, fill factor and energy conversion efficiency of solar cells.

Description

technical field [0001] The invention relates to the field of solar cell devices, in particular to a method for preparing a surface passivated antimony sulfide-based thin film solar cell. Background technique [0002] With the increasing shortage of resources, people pay more and more attention to energy research. Solar energy is a promising carbon-free energy source that can be used to sustain our lives. Unfortunately, so far, only a small fraction of the energy has been harvested with solar cells, mainly because of the high cost and environmental pollution issues involved in the solar cell fabrication process. Therefore, finding low-cost, environmentally friendly, efficient and stable solar cell materials has become the primary goal of solar cell research. In this regard, metal sulfide solar cells such as copper zinc sulfur selenide, copper indium gallium selenide, cadmium telluride, antimony selenide, and antimony sulfide have played an important role in solar energy app...

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Problems solved by technology

[0004] In order to overcome the defect existing in the prior art that it is easy to form defects at the device interface and affect the efficiency of the device, the present invention proposes a method for preparing antimony sulfide-based thin film solar cells by surface passivation

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