Phase-Selective Synthesis of CIGS Nanoparticles with Metastable Phases Through Tuning Solvent Composition

Nanoscale Research Letters

Xiaoli Peng¹  Xiaokun Zhang¹  Yong Xiang¹  Fang Wu¹  Shuai Liu¹  Baoguo Yang² 

[1] School of Materials and Energy, University of Electronic Science and Technology of China;Science and Technology on Electronic Test and Measurement Laboratory, The 41st Research Institute of CETC;

关键词: CIGS;    Nanoparticles;    Metastable;    Wurtzite;    Zincblende;    Phase-selective;   

DOI  :  10.1186/s11671-018-2781-1

来源: DOAJ

【 摘 要 】

Abstract I-III-VI2 compounds have shown great interests in the application of functional semiconductors. Among them, Cu(In,Ga)S2 has been a promising candidate due to its excellent optoelectronic properties. Although the polymorphs of Cu(In,Ga)S2 have been attracted extensive attentions, the efforts to developing the methodologies for phase-controlled synthesis of them are rare. In this paper, we reported a phase-selective synthesis of CIGS nanoparticles with metastable phases via simply changing the composition of solvents. For the wet chemistry synthesis, the microstructure of the initial nuclei is decisive to the crystal structure of final products. In the formation of Cu(In,Ga)S2, the solvent environment is the key factor, which could affect the coordination of monomers and influence the thermodynamic conditions of Cu-S nucleation. Moreover, wurtzite and zincblende Cu(In,Ga)S2 nanoparticles are selectively prepared by choosing pure en or its mixture with deionized water as reaction solvent. The as-synthesized wurtzite Cu(In,Ga)S2 possess a band gap of 1.6 eV and a carrier mobility of 4.85 cm2/Vs, which indicates its potential to construct a heterojunction with hexagonal-structured CdS for solar cells.

【 授权许可】

Unknown