TY - CHAP
T1 - PbSe Core, PbSe/PbS and PbSe/PbSexS1-x Core-Shell Nanocrystal Quantum Dots
T2 - Properties and Applications
AU - Lifshitz, E.
AU - Kigel, A.
AU - Brumer, M.
AU - Etgar, L.
AU - Kloper, V.
AU - Bashouti, M.
AU - Sashchiuk, A.
AU - Tennenbaum, R.
AU - Sirota, M.
AU - Galun, E.
AU - Burshtein, Z.
AU - Le Quang, A. Q.
AU - Ledoux-Rak, I.
AU - Zyss, J.
N1 - Publisher Copyright:
© 2008 Elsevier Ltd. All rights reserved.
PY - 2008/9/11
Y1 - 2008/9/11
N2 - This chapter details the properties and applications of core-shell nanocrystal quantum dots. It shows the preparation of air-stable PbSe/PbS core-shell and PbSe/PbSexS1-x core-alloyed-shell nanocrystal quantum dots (NQD). The structural characterization showed a continuous growth of the crystallographic plans without a distinct boundary at the core-shell interface due to a close crystallographic matching. Colloidal PbSe NQDs have currently received special interest due to their unique electronic and optical properties. The bulk PbSe semiconductor has a rocksalt crystal structure and a narrow direct band gap with both valence and conduction band maxima being four-fold degenerate at the L-point of the Brillouin zone. However, the absorption and emission spectra of the core-shell structures were red shifted with respect to the relevant core samples, due to a wavefunction spilling into the low barrier shell. Furthermore, the emission spectra are shifted with respect to their absorption bands, merging from a stokes' shift into anti-stokes' shift behavior, depending on the NQDs and shell thickness and composition.
AB - This chapter details the properties and applications of core-shell nanocrystal quantum dots. It shows the preparation of air-stable PbSe/PbS core-shell and PbSe/PbSexS1-x core-alloyed-shell nanocrystal quantum dots (NQD). The structural characterization showed a continuous growth of the crystallographic plans without a distinct boundary at the core-shell interface due to a close crystallographic matching. Colloidal PbSe NQDs have currently received special interest due to their unique electronic and optical properties. The bulk PbSe semiconductor has a rocksalt crystal structure and a narrow direct band gap with both valence and conduction band maxima being four-fold degenerate at the L-point of the Brillouin zone. However, the absorption and emission spectra of the core-shell structures were red shifted with respect to the relevant core samples, due to a wavefunction spilling into the low barrier shell. Furthermore, the emission spectra are shifted with respect to their absorption bands, merging from a stokes' shift into anti-stokes' shift behavior, depending on the NQDs and shell thickness and composition.
UR - http://www.scopus.com/inward/record.url?scp=84940857354&partnerID=8YFLogxK
U2 - 10.1016/B978-0-08-046325-4.00025-6
DO - 10.1016/B978-0-08-046325-4.00025-6
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AN - SCOPUS:84940857354
SN - 9780080463254
SP - 749
EP - 772
BT - Handbook of Self Assembled Semiconductor Nanostructures for Novel Devices in Photonics and Electronics
PB - Elsevier Inc.
ER -