کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1593072 1002684 2012 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Negative thermal quenching of the 3.338 eV emission in ZnO nanorods
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Negative thermal quenching of the 3.338 eV emission in ZnO nanorods
چکیده انگلیسی

We investigate the negative thermal quenching behavior of the 3.338 eV emission in ZnO nanorods. A correlation between the 3.338 eV and the 3.368 eV (surface exciton) emissions is determined from temperature-dependent photoluminescence. The activation energies of the 3.338 eV emission, obtained using an approximated multi-level model, indicate an trap state between the two surface exciton emissions. The present study demonstrates a nondestructive and easy method to understand the surface effects on the optical properties of semiconductor nanostructures.


► Negative thermal quenching of the 3.338 eV emission in ZnO is investigated.
► The activation energies of the 3.338 eV emission are exacted by a multi-level model.
► We attribute this emission as a near-surface structural defect-bound exciton.
► Trap states may exist between different surface exciton centers.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 152, Issue 18, September 2012, Pages 1757–1760
نویسندگان
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