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

Xiaokun ZHANG, Shuai LIU, Fang WU, Xiaoli PENG, Baoguo YANG, Yong XIANG*

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

6 Citations (Scopus)


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.

Original languageEnglish
Article number362
Number of pages7
JournalNanoscale Research Letters
Early online date14 Nov 2018
Publication statusPublished - Dec 2018
Externally publishedYes

Bibliographical note

This work is supported by the National Natural Science Foundation of China (Contract Nos.51472044 and 51102038) and Program for New Century Excellent Talents in University (Contract No. NCET-12-0098).


  • CIGS
  • Metastable
  • Nanoparticles
  • Phase-selective
  • Wurtzite
  • Zincblende


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