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Size-Dependent Band-Gap and Molar Absorption Coefficients of Colloidal CuInS2 Quantum Dots
The knowledge of the quantum dot (QD) concentration in a colloidal suspension and the quantitative understanding of the sizedependence of the band gap of QDs are of crucial importance from both applied and fundamental viewpoints. In this work, we investigate the sizedependence of the optical properties of nearly spherical wurtzite (wz) CuInS 2 (CIS) QDs in the 2.7 to 6.1 nm diameter range (polydispersity ≤10%). The QDs are synthesized by partial Cu + for In 3+ cation exchange in template Cu 2−xdoi:10.1021/acsnano.8b03641.s001 fatcat:5vn6op5fnjd5dn32zh6pgg6zuy