کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1301011 1498749 2014 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Time-domain ab initio modeling of excitation dynamics in quantum dots
ترجمه فارسی عنوان
مدل سازی زمان اولیه دامنه تحرک در نقاط کوانتومی
کلمات کلیدی
نیمه هادی و نانوذرات فلزی، نظریه کاربردی تابعی دامنه زمان، آرامش بی حرکتی، دینامیک مولکولی غیر دائمی، نسل چندگانه، تعامل الکترون-فونون
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
چکیده انگلیسی


• Configuration interaction allowed us to study photoexcitation in ideal, charged, and doped nanoclusters.
• We developed a new approach combining density functional theory and non-adiabatic molecular dynamics.
• Excited state dynamics in semiconductor and metallic quantum dots was simulated.
• We review elastic and inelastic electron-phonon interactions in nanoclusters.
• Auger processes result in multi-exciton generation and recombination.

The review discusses the results of ab initio time-dependent density functional theory and non-adiabatic molecular dynamics simulations of photoinduced dynamics of charges, excitons, plasmons, and phonons in semiconductor and metallic quantum dots (QDs). The simulations create an explicit time-domain representation of the excited-state processes, including elastic and inelastic electron–phonon scattering, multiple exciton generation, fission, and recombination. These nonequilibrium phenomena control the optical and electronic properties of QDs. Our approach can account for QD size and shape, as well as chemical details of QD structure, such as dopants, defects, core/shell regions, surface ligands, and unsaturated bonds. Each of these variations significantly alters the properties of photoexcited QDs. The insights reported in this review provide a comprehensive understanding of the excited-state dynamics in QDs and suggest new ways of controlling the photo-induced processes. The design principles that follow, guide development of photovoltaic cells, electronic and spintronic devices, biological labels, and other systems rooted in the unique physical and chemical properties of nanoscale materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Coordination Chemistry Reviews - Volumes 263–264, 15 March 2014, Pages 161–181
نویسندگان
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