http://dx.doi.org/10.1007/s10904-013-9830-0">
 

Document Type

Journal Article

Authors

Zhen-Rui Gu, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Mol., School of Chemistry and Chemical Engineering, Hubei University
Hui Fu, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Mol., School of Chemistry and Chemical Engineering, Hubei University
Li Liu, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Mol., School of Chemistry and Chemical Engineering, Hubei University
Fa-Bao Li, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Mol., School of Chemistry and Chemical Engineering, Hubei University
Shi-Zhong Liu, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Mol., School of Chemistry and Chemical Engineering, Hubei University
Yan-Rong Wang, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Mol., School of Chemistry and Chemical Engineering, Hubei University
Zu-Liang Du, Key Laboratory of Special Functional Materials, Henan University
Cheuk-Lam Ho, Inst. of Molecular Functional Materials (Areas of Excellence Scheme, Univ. Grants Cmte., Hong Kong), Department of Chemistry and Institute of Advanced Materials, Hong Kong Baptist UniversityFollow
Wai-Yeung Wong, Inst. of Molecular Functional Materials (Areas of Excellence Scheme, Univ. Grants Cmte., Hong Kong), Department of Chemistry and Institute of Advanced Materials, Hong Kong Baptist UniversityFollow

Department/Unit

Department of Chemistry

Title

Preparation, characterization, and photoelectric properties of Langmuir–Blodgett films of some europium-substituted polyoxometalates and 2-aminofluorene with tunable emission color

Language

English

Abstract

A new series of organic/inorganic composite Langmuir-Blodgett (LB) films consisting of 2-aminofluorene (Fl-NH2) as the π-conjugated organic molecule, an europium-substituted polyoxometalate (POM, POM = Na9EuW10O36, K13[Eu(SiW11O39)2] and K5[Eu(SiW11O39)(H2O)2], which are denoted by EuW10, EuW22 and EuW11, respectively) as the inorganic component, were prepared. Structural and photophysical characterization of these LB films were achieved by π-A isotherms, UV-Vis absorption and photoluminescence spectra, atomic force microscopy imaging, scanning tunneling microscopy, and surface photovoltage spectroscopy. Our experimental results indicate that stable Langmuir and LB films are formed in pure water and POM sub-phases. Luminescence spectra of the prepared hybrid LB films show that tunable emission color can be obtained due to the dual-emissive nature of the mixed Fl-NH2/POM blends. These 2-aminofluorene-based LB films displayed interesting electrical conductivity behavior. Among them, Fl-NH2/EuW11 3-layer films showed a good electrical response with the a tunneling current up to ± 100 nA when the voltage was monitored at -0. 8 to 1. 5 V. These LB composites show good photovoltage responses and a photovoltage of 2. 7 μV can be obtained for the Fl-NH2/EuW22 system when it is excited by light. © 2013 Springer Science+Business Media New York.

Keywords

2-Aminofluorene, Europium-substituted polyoxometalate, Langmuir-Blodgett film, Luminescence, Photovoltaic effect

Publication Date

2013

Source Publication Title

Journal of Inorganic and Organometallic Polymers and Materials

Volume

23

Issue

3

Start Page

665

End Page

672

Publisher

Springer Verlag

ISSN (print)

15741443

ISSN (electronic)

15741451

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