- Abstract:
- Photoluminescent emission is observed from surface-passivated PbS nanocrystals following the two-photon excitation of high-energy excitonic states. The emission appears directly at the excitation energy with no detectable Stokes-shift for a wide range of excitation energies. The observation of direct emission from states excited by two-photon absorption indicates that the parity of the excited states of surface-passivated PbS nanocrystals is partially mixed.
- Publication status:
- Published
- Publisher copy:
- 10.1088/0957-4484/15/9/040
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- Journal:
- NANOTECHNOLOGY
- Volume:
- 15
- Issue:
- 9
- Pages:
- 1351-1355
- Publication date:
- 2004-09-05
- DOI:
- EISSN:
-
1361-6528
- ISSN:
-
0957-4484
- URN:
-
uuid:794ef56d-b6d5-455c-97c4-23d0d63a518a
- Source identifiers:
-
25792
- Local pid:
- pubs:25792
- Language:
- English
- Copyright date:
- 2004
Journal article
Direct observation of mixed-parity excited states in surface-passivated PbS nanocrystals
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