Authors:
- Nominated by the University of Utah, USA, as an outstanding Ph.D. thesis
- Lays the groundwork for further use of Electron Spin Echo Envelop Modulation (ESEEM) and opens the possibility of highly precise chemical fingerprinting
- Reveals an astonishingly long memory of spin coherence in semiconductor particles
Part of the book series: Springer Theses (Springer Theses)
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Table of contents (5 chapters)
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Front Matter
About this book
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.
Keywords
- CdSe/CdS Nanocrystals
- Colloidal Nanocrystals
- Electron Spin Resonance
- Light Harvesting
- Optically Active Charge Traps
- Optically Active Charges
- Optically Detected Spin Coherence
- Pulsed Optically Detected Magnetic Resonance
- Seminconducting Nanocrystals
- Spin Coherence
- Spin Echo Envelop Modulation
- Trap States
Authors and Affiliations
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, Department of Physics & Astronomy, University of Utah, Salt Lake City, USA
Kipp van Schooten
About the author
Department of Physics and Astronomy
University of Utah
Salt Lake City, UT, 84112
USA
Kipp van Schooten received his Ph.D. in Physics (Condensed Matter focus) from the University of Utah in December 2012. He received the Outstanding Teaching Assistant award each year from 2005 - 2009 for the courses "Intro to Quantum Relativity" and "Solid State Physics II." In 2011, he also received first place for Best Graduate Student Oral Presentation at the University of Utah.
Bibliographic Information
Book Title: Optically Active Charge Traps and Chemical Defects in Semiconducting Nanocrystals Probed by Pulsed Optically Detected Magnetic Resonance
Authors: Kipp van Schooten
Series Title: Springer Theses
DOI: https://doi.org/10.1007/978-3-319-00590-4
Publisher: Springer Cham
eBook Packages: Physics and Astronomy, Physics and Astronomy (R0)
Copyright Information: Springer International Publishing Switzerland 2013
Hardcover ISBN: 978-3-319-00589-8Published: 30 July 2013
Softcover ISBN: 978-3-319-03328-0Published: 09 August 2015
eBook ISBN: 978-3-319-00590-4Published: 17 July 2013
Series ISSN: 2190-5053
Series E-ISSN: 2190-5061
Edition Number: 1
Number of Pages: XIV, 90
Number of Illustrations: 28 illustrations in colour
Topics: Semiconductors, Nanotechnology, Spectroscopy and Microscopy, Nanoscale Science and Technology, Nanotechnology and Microengineering, Quantum Information Technology, Spintronics