Air-stable CuInSe2 nanoparticles formed through partial cation exchange in methanol at room temperature. Issue 32 (30th June 2016)

• Record Type: Journal Article
• Authors: Choi, Ji Yong; Lee, Seon Joo; Seo, Won Seok; Song, Hyunjoon
• Is Part Of: CrystEngComm. Volume 18:Issue 32(2016)
• Page Start: 6069
• Page End: 6075
• Publication Date: 2016-06-30
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c6ce00950f
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Air-stable CuInSe2 nanoparticles were synthesized through partial cation exchange of Cu2− x Se nanoparticles with In 3+ in methanol at room temperature. Adjustment of the reaction period made it possible to tailor the optical bandgap in the range of 1–2 eV. Abstract : Spherical CuInSe2 nanoparticles were synthesized through a partial cation exchange reaction of Cu2− x Se nanoparticles in methanol at room temperature. An additive, tributylphosphine, rapidly reduced copper and selenium ions, and facilitated the dissolution of Cu ions. Poly(vinylpyrrolidone) retained the spherical morphology of the nanoparticles by anchoring on the surface. The fraction of In 3+ ions increased as the reaction progressed, which led to a decrease of the optical bandgap from 2.06 eV of Cu2− x Se to 1.03 eV of CuInSe2 . The resulting CuInSe2 particles exhibited high air and thermal stability, and can be applied as colloidal inks for thin film fabrication in optoelectronic devices.