Modification of the organic/La                         0.7                         Sr                         0.3                         MnO                         3                          interface by in situ gas treatment

X. Z. Wang; X. M. Ding; Z. S. Li; Y. Q. Zhan; I. Bergenti; V. A. Dediu; C. Taliani; Z. T. Xie; B. F. Ding; X. Y. Hou; W. H. Zhang; F. Q. Xu

doi:10.1016/j.apsusc.2007.05.035

Modification of the organic/La _0.7 Sr _0.3 MnO ₃ interface by in situ gas treatment

X. Z. Wang, X. M. Ding, Z. S. Li, Y. Q. Zhan, I. Bergenti, V. A. Dediu, C. Taliani, Z. T. Xie, B. F. Ding, X. Y. Hou, W. H. Zhang, F. Q. Xu

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

La _0.7 Sr _0.3 MnO ₃ (LSMO) can act as a spin injection electrode in organic spin-valves and organic light-emitting devices. For the latter application, good control of the electronic structure of the organic/LSMO interface is a key issue to ensure sufficient current injection in the device. By exposing cleaned LSMO surfaces to activated oxygen and hydrogen, the work function of the samples can reach 5.15 and 4.3 eV, respectively, as shown by in situ photoemission measurements. The initial stage of formation of the organic/LSMO interface upon deposition of N,N′-bis-(1-naphyl)-N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine (NPB) onto the oxygen-treated LSMO surface is examined. We find that the NPB molecules evenly cover the LSMO surface and that the interface barrier height is 0.8 eV, which is comparable to that at the NPB/indium tin oxide (ITO) interface with the ITO surface pretreated in situ by oxygen plasma.

Original language	English (US)
Pages (from-to)	9081-9084
Number of pages	4
Journal	Applied Surface Science
Volume	253
Issue number	23
DOIs	https://doi.org/10.1016/j.apsusc.2007.05.035
State	Published - Sep 30 2007
Externally published	Yes

Bibliographical note

Funding Information:
This work is supported by the National Natural Science Foundation of China. The ICTP-Elettra Users Programme provides partial support for the work done at Elettra. The authors thank Dr. S. Lizzit for technical assistance at the SuperESCA beamline. XZW thanks Student Innovation Foundation of NSRL for supporting his travels to NSRL.

Keywords

Organic/magnetic interface
Spin injection
Surface treatment
Synchrotron radiation

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Wang, X. Z., Ding, X. M., Li, Z. S., Zhan, Y. Q., Bergenti, I., Dediu, V. A., Taliani, C., Xie, Z. T., Ding, B. F., Hou, X. Y., Zhang, W. H., & Xu, F. Q. (2007). Modification of the organic/La _0.7 Sr _0.3 MnO ₃ interface by in situ gas treatment Applied Surface Science, 253(23), 9081-9084. https://doi.org/10.1016/j.apsusc.2007.05.035

Modification of the organic/La _0.7 Sr _0.3 MnO ₃ interface by in situ gas treatment . / Wang, X. Z.; Ding, X. M.; Li, Z. S. et al.
In: Applied Surface Science, Vol. 253, No. 23, 30.09.2007, p. 9081-9084.

Research output: Contribution to journal › Article › peer-review

Wang, XZ, Ding, XM, Li, ZS, Zhan, YQ, Bergenti, I, Dediu, VA, Taliani, C, Xie, ZT, Ding, BF, Hou, XY, Zhang, WH & Xu, FQ 2007, ' Modification of the organic/La _0.7 Sr _0.3 MnO ₃ interface by in situ gas treatment ', Applied Surface Science, vol. 253, no. 23, pp. 9081-9084. https://doi.org/10.1016/j.apsusc.2007.05.035

Wang XZ, Ding XM, Li ZS, Zhan YQ, Bergenti I, Dediu VA et al. Modification of the organic/La _0.7 Sr _0.3 MnO ₃ interface by in situ gas treatment Applied Surface Science. 2007 Sep 30;253(23):9081-9084. doi: 10.1016/j.apsusc.2007.05.035

Wang, X. Z. ; Ding, X. M. ; Li, Z. S. et al. / Modification of the organic/La _0.7 Sr _0.3 MnO ₃ interface by in situ gas treatment In: Applied Surface Science. 2007 ; Vol. 253, No. 23. pp. 9081-9084.

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title = " Modification of the organic/La 0.7 Sr 0.3 MnO 3 interface by in situ gas treatment ",

abstract = " La 0.7 Sr 0.3 MnO 3 (LSMO) can act as a spin injection electrode in organic spin-valves and organic light-emitting devices. For the latter application, good control of the electronic structure of the organic/LSMO interface is a key issue to ensure sufficient current injection in the device. By exposing cleaned LSMO surfaces to activated oxygen and hydrogen, the work function of the samples can reach 5.15 and 4.3 eV, respectively, as shown by in situ photoemission measurements. The initial stage of formation of the organic/LSMO interface upon deposition of N,N′-bis-(1-naphyl)-N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine (NPB) onto the oxygen-treated LSMO surface is examined. We find that the NPB molecules evenly cover the LSMO surface and that the interface barrier height is 0.8 eV, which is comparable to that at the NPB/indium tin oxide (ITO) interface with the ITO surface pretreated in situ by oxygen plasma.",

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note = "Funding Information: This work is supported by the National Natural Science Foundation of China. The ICTP-Elettra Users Programme provides partial support for the work done at Elettra. The authors thank Dr. S. Lizzit for technical assistance at the SuperESCA beamline. XZW thanks Student Innovation Foundation of NSRL for supporting his travels to NSRL.",

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AU - Bergenti, I.

AU - Dediu, V. A.

AU - Taliani, C.

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AU - Ding, B. F.

AU - Hou, X. Y.

AU - Zhang, W. H.

AU - Xu, F. Q.

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N2 - La 0.7 Sr 0.3 MnO 3 (LSMO) can act as a spin injection electrode in organic spin-valves and organic light-emitting devices. For the latter application, good control of the electronic structure of the organic/LSMO interface is a key issue to ensure sufficient current injection in the device. By exposing cleaned LSMO surfaces to activated oxygen and hydrogen, the work function of the samples can reach 5.15 and 4.3 eV, respectively, as shown by in situ photoemission measurements. The initial stage of formation of the organic/LSMO interface upon deposition of N,N′-bis-(1-naphyl)-N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine (NPB) onto the oxygen-treated LSMO surface is examined. We find that the NPB molecules evenly cover the LSMO surface and that the interface barrier height is 0.8 eV, which is comparable to that at the NPB/indium tin oxide (ITO) interface with the ITO surface pretreated in situ by oxygen plasma.

AB - La 0.7 Sr 0.3 MnO 3 (LSMO) can act as a spin injection electrode in organic spin-valves and organic light-emitting devices. For the latter application, good control of the electronic structure of the organic/LSMO interface is a key issue to ensure sufficient current injection in the device. By exposing cleaned LSMO surfaces to activated oxygen and hydrogen, the work function of the samples can reach 5.15 and 4.3 eV, respectively, as shown by in situ photoemission measurements. The initial stage of formation of the organic/LSMO interface upon deposition of N,N′-bis-(1-naphyl)-N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine (NPB) onto the oxygen-treated LSMO surface is examined. We find that the NPB molecules evenly cover the LSMO surface and that the interface barrier height is 0.8 eV, which is comparable to that at the NPB/indium tin oxide (ITO) interface with the ITO surface pretreated in situ by oxygen plasma.

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