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Materials 2017, 10(7), 820; https://doi.org/10.3390/ma10070820

Low-Temperature Preparation of Tungsten Oxide Anode Buffer Layer via Ultrasonic Spray Pyrolysis Method for Large-Area Organic Solar Cells

1
State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China
2
Co-Innovation Center for Micro/Nano Optoelectronic Materials and Devices, Research Institute for New Materials and Technology, Chongqing University of Arts and Sciences, Chongqing 402160, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Christ of Schneider
Received: 14 May 2017 / Revised: 19 June 2017 / Accepted: 22 June 2017 / Published: 18 July 2017
(This article belongs to the Section Energy Materials)
Full-Text   |   PDF [2681 KB, uploaded 19 July 2017]   |  

Abstract

Tungsten oxide (WO3) is prepared by a low-temperature ultrasonic spray pyrolysis method in air atmosphere, and it is used as an anode buffer layer (ABL) for organic solar cells (OSCs). The properties of the WO3 transition metal oxide material as well as the mechanism of ultrasonic spray pyrolysis processes are investigated. The results show that the ultrasonic spray pyrolysized WO3 ABL exhibits low roughness, matched energy level, and high conductivity, which results in high charge transport efficiency and suppressive recombination in OSCs. As a result, compared to the OSCs based on vacuum thermal evaporated WO3, a higher power conversion efficiency of 3.63% is reached with low-temperature ultrasonic spray pyrolysized WO3 ABL. Furthermore, the mostly spray-coated OSCs with large area was fabricated, which has a power conversion efficiency of ~1%. This work significantly enhances our understanding of the preparation and application of low temperature-processed WO3, and highlights the potential of large area, all spray coated OSCs for sustainable commercial fabrication. View Full-Text
Keywords: tungsten oxide; anode buffer layer; organic solar cells; large area; ultrasonic spray pyrolysis method tungsten oxide; anode buffer layer; organic solar cells; large area; ultrasonic spray pyrolysis method
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Ji, R.; Zheng, D.; Zhou, C.; Cheng, J.; Yu, J.; Li, L. Low-Temperature Preparation of Tungsten Oxide Anode Buffer Layer via Ultrasonic Spray Pyrolysis Method for Large-Area Organic Solar Cells. Materials 2017, 10, 820.

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