WANG Jin-shun, LI Hai-rong, PENG Ying-quan etc. Surface and Interface Analysis of ITO/Rubrene Using AFM and XPS[J]. Chinese Journal of Luminescence, 2014,35(2): 207-212
WANG Jin-shun, LI Hai-rong, PENG Ying-quan etc. Surface and Interface Analysis of ITO/Rubrene Using AFM and XPS[J]. Chinese Journal of Luminescence, 2014,35(2): 207-212 DOI: 10.3788/fgxb20143502.0207.
Surface and Interface Analysis of ITO/Rubrene Using AFM and XPS
The surface morphology and the interface electronic states of Indium-tin-oxide (ITO)/Rubrene were investigated by atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). The AFM results manifest that the Rubrene film deposited on ITO is very uniformity. The XPS results show that there are three main peaks in the C1s spectrum of the origin surface
which located at 282.50
284.70
289.30 eV
respectively. They are associated with CSi
C O
CC bonds. With the increasing of sputtering time
the peak corresponding to the aromatic C becomes intensely while the other peaks disappear rapidly. As the removing of the oxygen contamination on the surface
the O1s peak weakens firstly and then strengthens gradually. The O atoms mainly bond to C
and form O C
COC and aldehyde group in the interface. The peaks of In3d and Sn3d strengthen slowly
and become stable near the interface of ITO/Rubrene. The peak of C1s
In3d and Sn3d moves toward lower binding energy
indicating an inter-diffusion system formed by the interaction of Rubrene film and ITO in the interface.
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references
Ma D, Hummelgen I A, Jing X, et al. Charge transport in a blue-emitting alternating block copolymer with a small spacer to conjugated segment length ratio [J]. J. Appl. Phys., 2000, 87(1):312-316. [2] Matsumura M, Furukawa T. Properties of organic light-emitting devices with a rubrene sub-monolayer inserted between electron-and hole-transport layers [J]. Jpn.J. Appl. Phys., 2002, 41:2742-2746. [3] Aziz H, Popovic Z D. Study of organic light emitting devices with 5, 6, 11, 12-tetraphenylnaphthacene (rubrene)-doped hole transport layer [J]. SPIE, 2003, 4800:80-86. [4] Li M, Li W, Niu J, et al. Efficient white organic light-emitting device based on a thin layer of hole-transporting host with rubrene dopant [J]. Solid-State Electron., 2005, 49(12):1956-1960. [5] Chen F, Huang X W. OLEDA Dream Display TechnologyMaterials and Devices [M]. Beijing: The People's Postal Press, 2011:116 (in Chinese). [6] Contarini S, Howlett S P, Rizzo C, et al. XPS study on the dispersion of carbon additives in silicon carbide powders [J]. Appl.Surf. Sci., 1991, 51(3):177-183. [7] Le Q T, Avendano F M, Forsythe E W, et al. X-ray photoelectron spectroscopy and atomic force microscopy investigation of stability mechanism of tris-(8-hydroxyquinoline) aluminum-based light-emitting devices [J]. J.Vac. Sci. Technol. A, 1999, 17(4):2314-2317. [8] Ou G, Song Z, Gui W, et al. Analysis of PTCDA/ITO surface and interface using X-ray photoelectron spectroscopy and atomic force microscopy [J]. Chin. J. Semicond., 2006, 27(2):229-234. [9] Sundberg P, Larsson R, Folkesson B. On the core electron binding energy of carbon and the effective charge of the carbon atom [J]. J. Electron Spectrosc. Related Phenom., 1988, 46(1):19-29. [10] Nordfors D, Nilsson A, Svensson S, et al. X-ray excited photoelectron spectra of free molecules containing oxygen [J]. J. Electron Spectrosc. Related Phenom., 1991, 56(2):117-164. [11] Wagner C D. Handbook of X-ray Photoelectron Spectroscopy [M]. New York: Perkin-Elmer, 1979. [12] Kang M S, Ma H, Yip H L, et al. Direct surface functionalization of indium tin oxide via electrochemically induced assembly [J]. J. Mater. Chem., 2007, 17(33):3489-3492. [13] Huang W, Mi B X, Gao Z Q. Organics Electronics [M]. Beijing: Science Press, 2011:277. [14] Zheng D, Li H, Wang Y, et al. Surface and interface analysis of tris-(8-hydroxyquinoline) aluminum and indium-tin-oxide using atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) [J]. Appl. Surf. Sci., 2001, 183(3):165-172.