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Photoemission spectroscopy study of oxygen spectrum and the chemical failure process of Alq3-based light-emitting devices
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10.1063/1.3562151
/content/aip/journal/jap/109/9/10.1063/1.3562151
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/9/10.1063/1.3562151

Figures

Image of FIG. 1.
FIG. 1.

(Color online) The O 1s core level spectrum of the polluted Alq3 (which was exposed to air for 30 mins), showing the Al-O-C, OH, O-C = O, and H2O components.

Image of FIG. 2.
FIG. 2.

(Color online) The O 1s core level spectra of 1000 Å thick pristine Alq3 in 50% relative humidity for different exposure time: (a) for 0 min; (b) for 5 mins; (c) for 30 mins; (d) for hours. The components are Al-O-C bond [531 eV, in (a), (b), (c), (d)], OH bond [532.2 eV, in (b), (c), (d)], O-C = O bond [532.2 eV, in (d)], and H2O [534.1 eV, in (d)], respectively.

Image of Scheme 1.
Scheme 1.

Scheme 1. (1) The replacement of the oxyquinoline moieties in the Alq3 complex with water and (2) oxidative polymerization of 8-HQ.5

Image of FIG. 3.
FIG. 3.

(Color online) The O 1s core level spectra of 1000 Å thick pristine Alq3 in 70% relative humidity for different exposure time: (a) for 30 mins and (d) for hours. The components are Al-O-C bond [531 eV, in (a), (b)], OH bond [532.2 eV, in (b), (c), (d)], O-C = O bond [532.2 eV, in (d)], and H2O [534.1 eV, in (d)], respectively.

Image of FIG. 4.
FIG. 4.

(Color online) The C 1s core level spectra of 1000 Å thick pristine Alq3 in 50% relative humidity for different exposure time: (a) for 0 min; (b) for 5 mins; (c) for 30 mins; (d) for hours. The component are 284.8 eV (C-C, C = C, C-H, C-N and C = N), near 285.6 eV [C-O and C-OH (b), (c), (d)], 288.7 eV [O-C = O, only in (d)], respectively.

Tables

Generic image for table
Table I.

Comparison of experimentally observed O 1s values with literature values for Alq3, various organic materials surfaces and waters (all values in eV relative to C 1s = 284.8 ± 0.2 eV).

Generic image for table
Table II.

Alq3 in 50% and 70% relative humidity for different exposure time.

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/content/aip/journal/jap/109/9/10.1063/1.3562151
2011-05-02
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Photoemission spectroscopy study of oxygen spectrum and the chemical failure process of Alq3-based light-emitting devices
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/9/10.1063/1.3562151
10.1063/1.3562151
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