Abstract
The dynamics of band-edge photoluminescence (PL) in CdS nanocrystals (NC's) dispersed in a glass matrix are studied with the femtosecond up-conversion technique. The time-resolved PL spectra exhibit several discrete features (three of them are in the NC energy band gap) which are not pronounced in a cw PL spectrum. The initial stage of a PL decay is governed by a depopulation of the lowest extended states due to carrier trapping (localization) on the time scale of 1 ps. The low-energy bands originating from the extended-to-localized state transitions exhibit extremely fast buildup dynamics (rise time is 400-700 fs) which is explained by the preexisting occupation of the localized states.
| Original language | English |
|---|---|
| Pages (from-to) | 1463-1467 |
| Number of pages | 5 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 53 |
| Issue number | 3 |
| Publication status | Published - 1996 |
Fingerprint
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Ultrafast carrier dynamics in semiconductor quantum dots. / Klimov, Victor I; Haring Bolivar, P.; Kurz, H.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 53, No. 3, 1996, p. 1463-1467.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ultrafast carrier dynamics in semiconductor quantum dots
AU - Klimov, Victor I
AU - Haring Bolivar, P.
AU - Kurz, H.
PY - 1996
Y1 - 1996
N2 - The dynamics of band-edge photoluminescence (PL) in CdS nanocrystals (NC's) dispersed in a glass matrix are studied with the femtosecond up-conversion technique. The time-resolved PL spectra exhibit several discrete features (three of them are in the NC energy band gap) which are not pronounced in a cw PL spectrum. The initial stage of a PL decay is governed by a depopulation of the lowest extended states due to carrier trapping (localization) on the time scale of 1 ps. The low-energy bands originating from the extended-to-localized state transitions exhibit extremely fast buildup dynamics (rise time is 400-700 fs) which is explained by the preexisting occupation of the localized states.
AB - The dynamics of band-edge photoluminescence (PL) in CdS nanocrystals (NC's) dispersed in a glass matrix are studied with the femtosecond up-conversion technique. The time-resolved PL spectra exhibit several discrete features (three of them are in the NC energy band gap) which are not pronounced in a cw PL spectrum. The initial stage of a PL decay is governed by a depopulation of the lowest extended states due to carrier trapping (localization) on the time scale of 1 ps. The low-energy bands originating from the extended-to-localized state transitions exhibit extremely fast buildup dynamics (rise time is 400-700 fs) which is explained by the preexisting occupation of the localized states.
UR - http://www.scopus.com/inward/record.url?scp=0000559826&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000559826&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0000559826
VL - 53
SP - 1463
EP - 1467
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 3
ER -