Normal view MARC view ISBD view

Optically Active Charge Traps and Chemical Defects in Semiconducting Nanocrystals Probed by Pulsed Optically Detected Magnetic Resonance [electronic resource] / by Kipp van Schooten.

By: van Schooten, Kipp [author.].
Contributor(s): SpringerLink (Online service).
Material type: TextTextSeries: Springer Theses, Recognizing Outstanding Ph.D. Research: Publisher: Heidelberg : Springer International Publishing : Imprint: Springer, 2013Description: XIV, 90 p. online resource.Content type: text Media type: computer Carrier type: online resourceISBN: 9783319005904.Subject(s): Physics | Nanoscale science | Nanoscience | Nanostructures | Semiconductors | Quantum computers | Spintronics | Spectroscopy | Microscopy | Nanotechnology | Physics | Semiconductors | Nanotechnology | Spectroscopy and Microscopy | Nanoscale Science and Technology | Nanotechnology and Microengineering | Quantum Information Technology, Spintronics | Física y Astronomía | Física y AstronomíaAdditional physical formats: Printed edition:: No titleDDC classification: 537.622 Online resources: Texto completo
Contents:
Introduction -- Experimental Methods -- Spin-Dependent Exciton Quenching and Intrinsic Spin Coherence in CDSE/CDS Nanocrystals -- Towards Chemical Fingerprinting of Deep-Level Defect Sites in CDS Nanocrystals by Optically Detected Spin Coherence -- Summary of Work.
In: Springer eBooksSummary: Colloidal nanocrystals show much promise as an optoelectronics architecture due to facile control over electronic properties afforded by chemical control of size, shape, and heterostructure. Unfortunately, realizing practical devices has been forestalled by the ubiquitous presence of charge "trap" states which compete with band-edge excitons and result in limited device efficiencies. Little is known about the defining characteristics of these traps, making engineered strategies for their removal difficult. This thesis outlines pulsed optically detected magnetic resonance as a powerful spectroscopy of the chemical and electronic nature of these deleterious states. Counterintuitive for such heavy atom materials, some trap species possess very long spin coherence lifetimes (up to 1.6 µs). This quality allows use of the trapped charge's magnetic moment as a local probe of the trap state itself and its local environment. Beyond state characterization, this spectroscopy can demonstrate novel effects in heterostructured nanocrystals, such as spatially-remote readout of spin information and the coherent control of light harvesting yield.
Tags from this library: No tags from this library for this title.
    average rating: 0.0 (0 votes)
Item type Current location Shelving location Call number Status Date due Barcode Item holds
Springer (Colección 2013) Springer (Colección 2013) BIBLIOTECA GENERAL
Física y Astronomía Física y Astronomía (Browse shelf) Available
Total holds: 0

Introduction -- Experimental Methods -- Spin-Dependent Exciton Quenching and Intrinsic Spin Coherence in CDSE/CDS Nanocrystals -- Towards Chemical Fingerprinting of Deep-Level Defect Sites in CDS Nanocrystals by Optically Detected Spin Coherence -- Summary of Work.

Colloidal nanocrystals show much promise as an optoelectronics architecture due to facile control over electronic properties afforded by chemical control of size, shape, and heterostructure. Unfortunately, realizing practical devices has been forestalled by the ubiquitous presence of charge "trap" states which compete with band-edge excitons and result in limited device efficiencies. Little is known about the defining characteristics of these traps, making engineered strategies for their removal difficult. This thesis outlines pulsed optically detected magnetic resonance as a powerful spectroscopy of the chemical and electronic nature of these deleterious states. Counterintuitive for such heavy atom materials, some trap species possess very long spin coherence lifetimes (up to 1.6 µs). This quality allows use of the trapped charge's magnetic moment as a local probe of the trap state itself and its local environment. Beyond state characterization, this spectroscopy can demonstrate novel effects in heterostructured nanocrystals, such as spatially-remote readout of spin information and the coherent control of light harvesting yield.

There are no comments for this item.

Log in to your account to post a comment.

Powered by Koha