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Issue 40, 2013
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Colloidal Ni1−xCoxO nanostructures as anodic buffer layers in hybrid polypyrrole/Zn1−yInyO pn junctions

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Abstract

The availability of a wide array of colloidal organic/inorganic nanostructures has opened up an interface to establish highly innovative and attractive hybrid materials for a number of optoelectronic applications recently. In this regard, a colloidal route has been established to fabricate hybrid photodiodes and study the influence of Ni1−xCoxO colloids as anodic buffer layers in them. The buffer oxide nanostructures were established through a facile surfactant free wet chemical approach with a cubic phase. Their absorbance properties were found to be influenced by the charge transfer process taking place between the O2− and Co2+ ions, while the vibrations corresponding to Co ions in between the tetrahedral and octahedral sites were found to be predominant in the Raman spectroscopy measurements. Hybrid pn junctions were fabricated over the chemically in situ polymerized polypyrrole deposits using n-Zn1−yInyO and p-Ni1−xCoxO colloidal nanostructures through a drop casting methodology. The structural properties and distribution of the hybrid nanostructures across the heterostructures were perceived through Raman and scanning electron microscopy. The electrical properties of the fabricated hybrid heterostructures were assimilated using IV characteristics, which revealed the interfacial anodic buffer layers to improve the charge selectivity across the corresponding electrodes by acting as efficient hole transporting layers (HTL) and blocking the flow of electrons.

Graphical abstract: Colloidal Ni1−xCoxO nanostructures as anodic buffer layers in hybrid polypyrrole/Zn1−yInyO p–n junctions

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Publication details

The article was received on 17 May 2013, accepted on 05 Aug 2013, published on 07 Aug 2013 and first published online on 07 Aug 2013


Article type: Paper
DOI: 10.1039/C3CE40868J
Citation: CrystEngComm, 2013,15, 8195-8201
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    Colloidal Ni1−xCoxO nanostructures as anodic buffer layers in hybrid polypyrrole/Zn1−yInyO pn junctions

    G. M. Kumar, D. Kim and J. Park, CrystEngComm, 2013, 15, 8195
    DOI: 10.1039/C3CE40868J

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