Optically Active Charge Traps and Chemical Defects in Semiconducting Nanocrystals Probed by Pulsed Optically Detected Magnetic Resonance. 1st ed. 2013

種類:

電子ブック

責任表示:

by Kipp van Schooten

出版情報:

Cham : Springer International Publishing : Imprint: Springer, 2013

著者名:

• van Schooten, Kipp.
• SpringerLink (Online service)

シリーズ名:

Springer Theses, Recognizing Outstanding Ph.D. Research ;

ISBN:

9783319005904 [3319005901]    

注記:

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 heterostruct

ローカル注記:

学内専用E-BOOKS (local access only)