کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5397541 | 1505871 | 2017 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermodynamic behaviors of excitonic emission in ZnO nanorods grown by pulsed laser deposition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Thermodynamic behaviors of excitonic emission in ZnO nanorods grown by pulsed laser deposition Thermodynamic behaviors of excitonic emission in ZnO nanorods grown by pulsed laser deposition](/preview/png/5397541.png)
چکیده انگلیسی
We investigated the thermodynamic behaviors of the exciton emission in ZnO nanorods that had been grown by laser ablation. The ZnO nanorods exhibited a clear luminescence peak from the neutral donor-bound exciton (D0X), which persisted near room temperature. Through analyzing temperature-dependences of photoluminescence properties, we found out insignificant thermal-quenching of D0X, arising from the large donor binding energy (i.e., EbD(NR) ~ 51.1 ± 7.3 meV). A small discrepancy of EbD(NR) from ZnO bulks' values (i.e., EbD(Bulk) = 53 - 72 meV) is associated with inhomogeneous thermal-broadening factors such as defect-scattering at the surface of the nanorod. Despite of inhomogeneous thermal-broadening, the ZnO nanorods still have a high luminescence efficiency because of the weak homogeneous thermal-broadening effect (i.e., low exciton-phonon coupling).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 190, October 2017, Pages 314-318
Journal: Journal of Luminescence - Volume 190, October 2017, Pages 314-318
نویسندگان
Youngmin Lee, Dong Jin Lee, Hak Dong Cho, Im Taek Yoon, Yoon Shon, Sejoon Lee,