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
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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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
Journal: Superlattices and Microstructures - Volume 84, August 2015, Pages 126-131
نویسندگان
Qian Dai, Xiong Zhang, Shuchang Wang, Bo Huang, Jiayu Zhang, Yiping Cui,