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Water-processable nanocomposite based on polyaniline and 2D molybdenum disulfide for NIR-transparent ambipolar transport layers

Oxana L. Gribkova, Alexander A. Nekrasov, Varvara A. Cabanova, Tatyana V. Krivenko, Natalia V. Nekrasova, Sergey A. Yakovlev, Evgeny I. Terukov, and Alexey R. Tameev

A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Moscow, Russian Federation

 

E-mail: oxgribkova@gmail.com

Abstract: Polymer nanocomposite based on stable water-dispersible polyaniline complex with poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PANI–PAMPSA) and 2D molybdenum disulphide (MoS2) was developed. The nanocomposite layers obtained by drop-casting were characterized by Vis–NIR- and FTIR spectroscopies, as well as by atomic force, transmission electron, and Kelvin-probe microscopies, X-ray diffraction, cyclic voltammetry, Hall effect, and DC-conductivity measurements. It was shown that the preparation procedure allows easy adjusting of MoS2 content in the nanocomposite resulting in the growth of DC conductivity by up to six times in the case of 20 wt% MoS2 as compared with the additive-free PANI–PAMPSA complex. FTIR spectroscopy revealed the existence of hydrophobic interactions between PANI–PAMPSA and 2D MoS2 nanophase, which facilitate interchain electron transfer. Hall effect studies showed that while increasing MoS2 content in the nanocomposite, a transition occurs from monopolar hole transport, characteristic of PANI–PAMPSA, to ambipolar transport. This feature makes the obtained PANI–PAMPSA/MoS2 composite a promising material for different optoelectronic devices, in particular tandem solar cells.

Keywords: Polyaniline ; Polymeric sulfonic acid ; 2D-layered structures ; Molybdenum disulfide ; Conductivity ; Charge carrier mobility 

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-018-0424-8

 

Chemical Papers 72 (7) 1741–1752 (2018)

Monday, February 26, 2024

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