Abstract
We present detailed electronic structure calculations, based on an atomistic pseudopotential approach, for a 42 Å InP QD; theoretical results are correlated to results of experimental measurements. To better understand energy loss dynamics and mechanisms for hot carriers in QDs, we investigate relaxation between electronic levels in InP QDs with diameters significantly smaller than twice the Bohr exciton radius. Energy level spacings exceeding the optical phonon energy present the opportunity for slowed charge carrier cooling (phonon bottleneck effect). However, interaction between confined electrons and holes provides an alternate, efficient relaxation route. Therefore, we expect sufficiently fast charge separation to weaken the Coulomb interaction and decrease the electronic energy loss rate. We study electronic relaxation in InP QDs using variations of subpicosecond transient absorption spectroscopy.
| Original language | English |
|---|---|
| Title of host publication | Physica Status Solidi C: Conferences |
| Pages | 1229-1232 |
| Number of pages | 4 |
| Edition | 4 |
| DOIs | |
| Publication status | Published - 2003 |
| Event | 2nd International Conference on Semiconductor Quantum Dots, QD 2002 - Tokyo, Japan Duration: Sep 30 2002 → Oct 3 2002 |
Other
| Other | 2nd International Conference on Semiconductor Quantum Dots, QD 2002 |
|---|---|
| Country | Japan |
| City | Tokyo |
| Period | 9/30/02 → 10/3/02 |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
Cite this
Experimental and theoretical investigation of electronic structure in colloidal indium phosphide quantum dots. / Ellingson, Randy J.; Blackburn, Jeffrey L.; Nedeljkovic, Jovan; Rumbles, Gary; Jones, Marcus; Fu, H.; Nozik, Arthur J.
Physica Status Solidi C: Conferences. 4. ed. 2003. p. 1229-1232.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Experimental and theoretical investigation of electronic structure in colloidal indium phosphide quantum dots
AU - Ellingson, Randy J.
AU - Blackburn, Jeffrey L.
AU - Nedeljkovic, Jovan
AU - Rumbles, Gary
AU - Jones, Marcus
AU - Fu, H.
AU - Nozik, Arthur J.
PY - 2003
Y1 - 2003
N2 - We present detailed electronic structure calculations, based on an atomistic pseudopotential approach, for a 42 Å InP QD; theoretical results are correlated to results of experimental measurements. To better understand energy loss dynamics and mechanisms for hot carriers in QDs, we investigate relaxation between electronic levels in InP QDs with diameters significantly smaller than twice the Bohr exciton radius. Energy level spacings exceeding the optical phonon energy present the opportunity for slowed charge carrier cooling (phonon bottleneck effect). However, interaction between confined electrons and holes provides an alternate, efficient relaxation route. Therefore, we expect sufficiently fast charge separation to weaken the Coulomb interaction and decrease the electronic energy loss rate. We study electronic relaxation in InP QDs using variations of subpicosecond transient absorption spectroscopy.
AB - We present detailed electronic structure calculations, based on an atomistic pseudopotential approach, for a 42 Å InP QD; theoretical results are correlated to results of experimental measurements. To better understand energy loss dynamics and mechanisms for hot carriers in QDs, we investigate relaxation between electronic levels in InP QDs with diameters significantly smaller than twice the Bohr exciton radius. Energy level spacings exceeding the optical phonon energy present the opportunity for slowed charge carrier cooling (phonon bottleneck effect). However, interaction between confined electrons and holes provides an alternate, efficient relaxation route. Therefore, we expect sufficiently fast charge separation to weaken the Coulomb interaction and decrease the electronic energy loss rate. We study electronic relaxation in InP QDs using variations of subpicosecond transient absorption spectroscopy.
UR - http://www.scopus.com/inward/record.url?scp=34247259306&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34247259306&partnerID=8YFLogxK
U2 - 10.1002/pssc.200303100
DO - 10.1002/pssc.200303100
M3 - Conference contribution
AN - SCOPUS:34247259306
SP - 1229
EP - 1232
BT - Physica Status Solidi C: Conferences
ER -