کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1596546 1002832 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optoelectronic characteristics of CdTe/HgTe/CdTe quantum-dot quantum-well nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Optoelectronic characteristics of CdTe/HgTe/CdTe quantum-dot quantum-well nanoparticles
چکیده انگلیسی
Optoelectronic characteristics of CdTe/HgTe/CdTe quantum-dot quantum-well (QDQW) nanoparticles synthesized by the colloidal method are investigated in this study. Strong exciton bands were observed in absorption and photoluminescence (PL) spectra taken for the CdTe/HgTe/CdTe QDQW nanoparticles. The energy difference between the exciton absorption and PL bands is larger than those obtained with CdTe and HgTe nanoparticles. Photocurrent-voltage curves and time-dependent photocurrent curves were obtained for the CdTe/HgTe/CdTe QDQW nanoparticles. With regard to the photocurrent mechanism of these QDQW nanoparticles, those charge carriers participating in the formation of excitons may not contribute to the photocurrent, because of the large binding energy of the excitons. Moreover, it is suggested in this paper that free holes in the HgTe quantum-well in the valance band, rather than free electrons, are the main contributors to the photocurrent.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 140, Issue 5, November 2006, Pages 215-218
نویسندگان
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