Journal
CURRENT APPLIED PHYSICS
Volume 17, Issue 8, Pages 1021-1028Publisher
ELSEVIER
DOI: 10.1016/j.cap.2017.04.014
Keywords
s-MoOx; Low-temperature; Solution-based; Polymer solar cells
Funding
- National Natural Science Foundation of China [61604047]
- Guangxi Natural Science Foundation Program [2016GXNSFBA380119]
- Guilin university of Electronic Technology [UF15016Y]
- Free the Discovery Fund of Guangxi Key Laboratory of Information Materials [151010-Z]
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Water-free solvent soluble, low-temperature processed metal oxides are important for preparing efficient and stable electronic devices, as well as the convenience in simplifying the device production process. Here we reported a facile approach with the features of low-temperature and solution-based process for the formation of a MoOx (s-MoOx) film as interface layer in polymer solar cells(PSCs). The absorbability, elementary composition, electronic property and surface microstructure of the s-MoOx are investigated in detail by ultraviolet visible spectrophotometer (UV-vis), X-ray photoelectron spectrometry (XPS), ultraviolet photo-electron spectrometer (UPS) and atomic force microscopy (AFM). These investigations confirmed that such MoOx xerogel has high solubility in the organic alcohol solvents, such as ethanol and methanol. Meanwhile, this s-MoOx can be applied as the interfacial layer in organic solar cells via a low-temperature treatment (about 100 degrees C) due to its proper physical properties, and a power conversion efficiency (PCE) over 3% was achieved. In addition, the devices with s-MoOx shows excellent air-stability, and the PCE efficiency can maintain about 84% of its initial value after 100 h exposure in air, which is dramatically enhanced comparing with the common devices with PEDOT:PSS layer. (C) 2017 Elsevier B.V. All rights reserved.
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