کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9801946 1515736 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced electroluminescence properties of doped ZnS nanorods formed by the self-assembly of colloidal nanocrystals
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Enhanced electroluminescence properties of doped ZnS nanorods formed by the self-assembly of colloidal nanocrystals
چکیده انگلیسی
Aggregation based meso-scale self-assembly of doped semiconductor nanocrystals leading to the formation of monocrystalline nanorods showing enhanced photo- and electro-luminescence properties is reported. ∼4 nm sized, polycrystalline ZnS nanoparticles of zinc-blende (cubic) structure, doped with Cu+-Al3+ have been aggregated in the aqueous solution and grown into nanorods of length ∼400 nm and aspect ratio ∼12. Transmission electron microscopic (TEM) images indicate crystal growth mechanisms involving particle-to-particle oriented-attachment assisted by sulphur-sulphur catenation leading to covalent-linkage. The nanorods exhibit self-assembly dependant luminescence properties such as quenching of the lattice defect-related emissions accompanied by the enhancement in the dopant-related emission, efficient low-voltage electroluminescence (EL) and super-linear voltage-brightness EL characteristics. This study demonstrates the technological importance of aggregation based self-assembly in doped semiconductor nanosystems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 135, Issues 1–2, July 2005, Pages 16-20
نویسندگان
, , , , ,