Journal of Chemical Physics, volume 96, issue 2, pages 946-954

Luminescence properties of CdSe quantum crystallites: Resonance between interior and surface localized states

M G Bawendi 1
P J CARROLL 1
William L. Wilson 1
L E Brus 1
1
 
AT&T Bell Laboratories, Murray HIll, New Jersey 07974
Publication typeJournal Article
Publication date1992-01-15
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor4.4
ISSN00219606, 10897690
Physical and Theoretical Chemistry
General Physics and Astronomy
Abstract

We use time-, wavelength-, temperature-, polarization-resolved luminescence to elucidate the nature of the absorbing and ‘‘band edge’’ luminescing states in 32 Å diameter wurtzite CdSe quantum crystallites. Time-resolved emission following picosecond size-selective resonant excitation of the lowest excited state shows two components—a temperature insensitive 100 ps component and a microsecond, temperature sensitive component. The emission spectrum, showing optic phonon vibrational structure, develops a ∼70 wave number red shift as the fast component decays. Photoselection shows the slow component to be reverse polarized at 10 K, indicating this component to be the result of a hole radiationless transition. The 100 ps emitting state is repopulated thermally as temperature increases from 10 to 50 K. All available data are interpreted by postulating strong resonant mixing between a standing wave molecular orbital delocalized inside the crystallite and intrinsic surface Se lone pair states. The apparent exciton transition is assigned to a ∼130 wave number wide band of eigenstates with the hole localized principally on the surface. The band contains strongly emitting ‘‘doorway’’ states and weakly emitting ‘‘background’’ states. The hole becomes mobile among these states as T increases to 50 K. It is suggested that such resonant mixing may be general in II–VI and III–V crystallites.

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Bawendi M. G. et al. Luminescence properties of CdSe quantum crystallites: Resonance between interior and surface localized states // Journal of Chemical Physics. 1992. Vol. 96. No. 2. pp. 946-954.
GOST all authors (up to 50) Copy
Bawendi M. G., CARROLL P. J., Wilson W. L., Brus L. E. Luminescence properties of CdSe quantum crystallites: Resonance between interior and surface localized states // Journal of Chemical Physics. 1992. Vol. 96. No. 2. pp. 946-954.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1063/1.462114
UR - https://doi.org/10.1063/1.462114
TI - Luminescence properties of CdSe quantum crystallites: Resonance between interior and surface localized states
T2 - Journal of Chemical Physics
AU - Bawendi, M G
AU - CARROLL, P J
AU - Wilson, William L.
AU - Brus, L E
PY - 1992
DA - 1992/01/15 00:00:00
PB - American Institute of Physics (AIP)
SP - 946-954
IS - 2
VL - 96
SN - 0021-9606
SN - 1089-7690
ER -
BibTex |
Cite this
BibTex Copy
@article{1992_Bawendi,
author = {M G Bawendi and P J CARROLL and William L. Wilson and L E Brus},
title = {Luminescence properties of CdSe quantum crystallites: Resonance between interior and surface localized states},
journal = {Journal of Chemical Physics},
year = {1992},
volume = {96},
publisher = {American Institute of Physics (AIP)},
month = {jan},
url = {https://doi.org/10.1063/1.462114},
number = {2},
pages = {946--954},
doi = {10.1063/1.462114}
}
MLA
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MLA Copy
Bawendi, M. G., et al. “Luminescence properties of CdSe quantum crystallites: Resonance between interior and surface localized states.” Journal of Chemical Physics, vol. 96, no. 2, Jan. 1992, pp. 946-954. https://doi.org/10.1063/1.462114.
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