Electronic Resource

Optically active charge traps and chemical defects in semiconducting nanocrystals probed by pulsed optically detected magnetic resonance

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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.

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Ketersediaan

Informasi Detail

Judul Seri

Springer Theses

No. Panggil

E1653

Penerbit

Switzerland : Springer Cham., 2013

Deskripsi Fisik

xiv, 90 hlm. : il. warna.

Bahasa

English

ISBN/ISSN

9783319005904

Klasifikasi

NONE

Tipe Isi

text

Tipe Media

computer

Tipe Pembawa

online resource

Edisi

-

Subjek

Semikonduktor : Perangkat Elektronik
Nanoteknologi dan Teknik Mikro

Info Detail Spesifik

-

Pernyataan Tanggungjawab

Kipp van Schooten

Versi lain/terkait

Lampiran Berkas

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