DOI: 10.1063/1.121100. Investigation of the interface formation between calcium and tris-(8-hydroxy quinoline) aluminum

Investigation of the interface formation between calcium and tris-(8-hydroxy quinoline) aluminum

10.1063/1.121100

Crossref journal-article

AIP Publishing

Applied Physics Letters (317)

Abstract

X-ray and ultraviolet photoemission spectroscopy investigations reveal strong interactions between Ca and tris-(8-hydroxy quinoline) aluminum (Alq3) during the Ca/Alq3 interface formation. The details of the interaction depend on the direction of the interface formation. For the case of Ca deposited on Alq3, a staged interface reaction is observed. For low Ca coverages (ΘCa⩽4 Å), negatively charged Alq3 radical anions are formed by electron transfer from the Ca. The emergence of new states in the energy gap is observed in the UPS spectra. At higher coverages, the Ca reacts with the phenoxide oxygen resulting in the decomposition of the Alq3 molecule. On the other hand, for the case of Alq3 deposited on Ca, a strong chemical reaction takes place as soon as Alq3 is deposited, and Ca attacks every constituent of Alq3. Finally, no interaction occurs between Alq3 and the Ca substrate if the substrate has been passivated by oxygen prior to the Alq3 deposition.

Bibliography

Choong, V.-E., Mason, M. G., Tang, C. W., & Gao, Y. (1998). Investigation of the interface formation between calcium and tris-(8-hydroxy quinoline) aluminum. Applied Physics Letters, 72(21), 2689â2691.

Authors 4

V.-E. Choong (first)
M. G. Mason (additional)
C. W. Tang (additional)
Yongli Gao (additional)

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{'key': '2024020314240951700_r4', 'first-page': '84', 'volume': '1910', 'year': '1994', 'journal-title': 'Proc. SPIE'} / Proc. SPIE (1994)
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Dates

Type	When
Created	23 years ago (July 26, 2002, 9:43 a.m.)
Deposited	1 year, 6 months ago (Feb. 3, 2024, 9:24 a.m.)
Indexed	1 month, 4 weeks ago (June 28, 2025, 12:05 a.m.)
Issued	27 years, 3 months ago (May 25, 1998)
Published	27 years, 3 months ago (May 25, 1998)
Published Print	27 years, 3 months ago (May 25, 1998)

Funders 0

None

BibTeX

@article{Choong_1998, title={Investigation of the interface formation between calcium and tris-(8-hydroxy quinoline) aluminum}, volume={72}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.121100}, DOI={10.1063/1.121100}, number={21}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Choong, V.-E. and Mason, M. G. and Tang, C. W. and Gao, Yongli}, year={1998}, month=may, pages={2689–2691} }

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