کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1553089 1513217 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Strong two-photon absorption of CuInS2/ZnS quantum dots with various Cu/In ratios
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Strong two-photon absorption of CuInS2/ZnS quantum dots with various Cu/In ratios
چکیده انگلیسی
The CuInS2 (CIS)/ZnS quantum dot (QD) samples with various Cu/In ratios have been synthesized and characterized. The effective two-photon absorption (TPA) coefficients for a series of CIS/ZnS core/shell QDs were measured by Z-scan technique. It was found that the TPA coefficients and quantum yields (QYs) of these samples were enhanced dramatically as the Cu/In ratio was decreased, and saturated at a Cu/In ratio of 1/4. A QY as high as 79% was achieved at a Cu/In ratio of 1/4. The effects of surface states and photon-induced dipole moment were demonstrated to be responsible for the optical nonlinear features of the colloidal core/shell QDs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Superlattices and Microstructures - Volume 84, August 2015, Pages 126-131
نویسندگان
, , , , , ,