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Doped Polyaniline-Hybridized Tungsten Oxide Nanocrystals as Hole Injection Layers for Efficient Organic Light Emitting Diodes

Abstract

Solution-processed tungsten oxide nanocrystals (WO3 NCs) hybridized with conductive polymer, polyaniline: poly (styrene sulfonate) (PANI: PSS), are introduced as a hole injection layer (HIL) in organic light emitting diodes (OLEDs). These devices exhibited much higher current efficiency (CE) and power efficiency (PE) compared to the regular devices without HILs and devices using pristine WO3 NCs as HILs. This enhanced device performance is mainly attributed to the facilitated hole injection due to the improvement of the energy level alignment at interface between ITO anode and organic semiconductors layer. Besides, the PANI: PSS can efficiently reduce the surface defects and enhance film-forming property of WO3 NCs without affecting the device conductivity. These results suggest that PANI: PSS-WO3 could be a promising candidate for charge inject layers in optoelectronic devices.

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Publication details

The article was received on 28 Feb 2018, accepted on 31 May 2018 and first published on 04 Jun 2018


Article type: Paper
DOI: 10.1039/C8TC01005F
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Doped Polyaniline-Hybridized Tungsten Oxide Nanocrystals as Hole Injection Layers for Efficient Organic Light Emitting Diodes

    W. Zhu, X. Chen, J. Chang, R. Yu, H. Li, D. Liang, X. Wu, Y. Wang and C. Lu, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC01005F

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