DOI: 10.1063/1.473875. The band edge luminescence of surface modified CdSe nanocrystallites: Probing the luminescing state

The band edge luminescence of surface modified CdSe nanocrystallites: Probing the luminescing state

10.1063/1.473875

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

We study the luminescence of surface modified CdSe nanocrystallites. There has been much speculation as to the origin of the band edge emission in these quantum confined structures. Because of their large surface to volume ratios it has been suggested that the emission originates from surface-related states. However, recent theory suggests that the band edge luminescence arises from an optically inactive fine structure state or “dark” exciton. To address this issue we modify the surface of CdSe nanocrystallites with a variety of organic and inorganic ligands. We then monitor the effect changing the surface has on the energetics of the band edge luminescence through photoluminescence and fluorescence line narrowing experiments. Our results are compared with theoretical predictions for the nonresonant and resonant luminescence. We find good agreement between experiment and theory for CdSe nanocrystallites passivated with trioctylphosphine oxide, ZnS, 4-picoline, 4-(trifluoromethyl)thiophenol, and tris(2-ethylhexyl)phosphate. The lack of dependence of our data on surface modification is consistent with a dark exciton description of the band edge luminescence.

Bibliography

Kuno, M., Lee, J. K., Dabbousi, B. O., Mikulec, F. V., & Bawendi, M. G. (1997). The band edge luminescence of surface modified CdSe nanocrystallites: Probing the luminescing state. The Journal of Chemical Physics, 106(23), 9869â9882.

Authors 5

M. Kuno (first)
J. K. Lee (additional)
B. O. Dabbousi (additional)
F. V. Mikulec (additional)
M. G. Bawendi (additional)

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Dates

Type	When
Created	23 years ago (July 26, 2002, 8:27 a.m.)
Deposited	1 year, 6 months ago (Feb. 5, 2024, 5:48 p.m.)
Indexed	3 weeks, 1 day ago (July 30, 2025, 10:21 a.m.)
Issued	28 years, 2 months ago (June 15, 1997)
Published	28 years, 2 months ago (June 15, 1997)
Published Print	28 years, 2 months ago (June 15, 1997)

Funders 0

None

BibTeX

@article{Kuno_1997, title={The band edge luminescence of surface modified CdSe nanocrystallites: Probing the luminescing state}, volume={106}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.473875}, DOI={10.1063/1.473875}, number={23}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Kuno, M. and Lee, J. K. and Dabbousi, B. O. and Mikulec, F. V. and Bawendi, M. G.}, year={1997}, month=jun, pages={9869–9882} }

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