A kind of copper-iron-zinc-tin-sulfur micron single crystal particle and its preparation method and its application in the preparation of solar cells

Abstract

The invention discloses a preparation method for copper-iron-zinc-tin-sulfur micron monocrystal particles. Elementary substance copper powder, elementary substance zinc powder, elementary substance tin powder, metal sulfide powder, elementary substance sulfur powder, a fluxing agent and the like are combined to form the reaction raw material; the reaction raw material is grinded and mixed based on a determined formula; the mixed powder is vacuum packaged in a quartz reaction container at a temperature of 600-1,000 DEG C for 48-120h; the quartz reaction container is cooled rapidly to the room temperature; and then the sample is taken out, washed and dried to obtain the copper-iron-zinc-tin-sulfur micron monocrystal particles. The dimensions of the prepared monocrystal particles can be regulated and controlled according to recrystallization temperature and time; the components of the particles can be effectively blended within a certain range based on the molar ratio of elements in the precursor; and in addition, the obtained monocrystal particles are uniform in particles, controllable in dimensions, and better in performance than that of the monocrystal particles prepared by the conventional method.

Description

technical field [0001] The invention relates to the technical field of semiconductor optoelectronic materials and devices, more specifically, to a copper-iron-zinc-tin-sulfur micron single-crystal particle, a preparation method thereof, and an application in the preparation of solar cells. Background technique [0002] Multi-component CuInGaSe 2 (CIGS) thin-film solar cell has high conversion efficiency and is easy to mass-produce, and has become the most promising solar cell material at present. Currently, CIGS cell is the thin-film solar cell with the highest photoelectric conversion efficiency in the world, and its highest conversion efficiency has been up to 21.7%. However, its constituent elements In and Ga are scarce on the earth, making it difficult for CIGS thin-film batteries to achieve TW (10 9 kW) level of large-scale applications. [0003] The natural ore of kesterite in nature is mainly Cu 2 [FeZn]SnS 4 , while kesterite Cu 2 ZnSnS 4 (CZTS) quaternary sem...

AI Technical Summary

Problems solved by technology

However, compared with binary and ternary compound semiconductors, compound semiconductors such as CFZTS have more complex physical properties due to the increase of constituent elements, so the preparation and performance optimization of high-efficiency thin-film batteries of such compounds become more complex. Difficult, and this kind of multi-component compound is very prone to various binary and ternary heterophases and some metastable phases during the preparation process. Commonly used multi-component co-evaporation, pulse laser deposition, sulfide selenization after sputtering, electrochemical film It is difficult to prepare CFZTS films with uniform composition and stable performance by vacuum processes such as post-selenization and sulfidation and non-vacuum processes such as heat injection, solvothermal, hydrothermal method, and spray pyrolysis; when preparing solar cells, the performance of single crystal particle batteries Better performance than thin film batteries, however, traditional single crystal growth techniques (vapor phase transport technology, melting technology) are difficult to grow large-sized single crystal particles that meet the performance requirements of the solar cell absorber layer

Images