Synthesis of CuInxGa1−xSe2 nanoparticles in organic solvent for thin film solar cells

• Published in: Thin solid films Vol. 546; pp. 279 - 283
• Main Authors: Hahn, Jae-Sub, Lee, Soo-Ho, Seo, Moon-Soo, Choi, Dae-Kyu, Lee, Jaehyeong, Shim, Joongpyo
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.11.2013; Elsevier
• Subjects: Chalcopyrite; Composition and phase identification; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Cu(In,Ga)Se2; Exact sciences and technology; FABRICATION; HEAT TREATING; Heat treatment; Lattice parameters; Materials science; Methods of nanofabrication; Nanoparticle; Nanoparticles; Nanoscale materials and structures: fabrication and characterization; ORGANIC COMPOUNDS; Other topics in nanoscale materials and structures; PARAMETERS; PARTICLES; Physics; Solar cells; SOLVENTS; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Synthesis; Thin film solar cell; Thin film structure and morphology; THIN FILMS; Thin film solar cell; Chalcopyrite; Cu(In,Ga)Se2; Nanoparticle; Temperature dependence; Amines; Indium chloride; Organic solvents; Lattice parameters; Heat treatments; Thin films; Nanoparticles; Energy gap; Thin film devices; Chemical composition; Cu(In,Ga)Se; Nanostructured materials; Nanomaterial synthesis; Crystal structure
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/j.tsf.2013.06.047

Chalcopyrite CuIn1−xGaxSe2 (CIGS; x<0.3) nanoparticles were synthesized by reacting CuCl, InCl3, GaCl3 and Se in oleyl amine over 250°C. Depending on the reaction temperature and duration, the obtained nanoparticles had sizes of less than 100nm and different chemical compositions. Because the atomic percentage of Se decreased with increasing reaction time, the proportion of Se and Ga content also changed. Furthermore, the lattice parameters, a and c, changed with increasing reaction temperature and time. Lastly, the bandgap energies of the CIGS films coated on glass plates were~0.98eV and did not significantly change with increasing heat-treatment temperature. •CuIn1−xGaxSe2 (x<0.3) nanoparticles synthesized by solution process in oleyl amine.•Se an Ga content in chalcopyrite particles increased with reaction time.•The nanoparticle lattice parameters changed with reaction temperature and time.•Band gaps remained fairly stable upon change of reaction temperature and time.