Mechanism of Degradation and Improvement of Stability on Mesogenic-Phthalocyanine-Based Bulk Heterojunction Solar Cell

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概要

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• The stability of bulk heterojunction organic solar cells utilizing the phthalocyanine derivative 1,4,8,11,15,18,22,25-octahexylphthalocyanine (C6PcH2) and the fullerene derivative 1-(3-methoxy-carbonyl)-propyl-1-1-phenyl-(6,6)C61 has been studied. In the same environment, C6PcH2-based cells have shown higher stability than the cells fabricated using the conventional donor material poly(3-hexylthiophene). Furthermore, the degradation mechanisms of these solar cells have been investigated. It was found that the chemical bonds of two pyrrole aza nitrogens as well as the four mesobridging aza nitrogens with neighboring carbons in the C6PcH2 molecule were broken after irradiation with a solar simulator, which affected the device lifetime. To improve the stability, various buffer layers have been deposited between the counterelectrode and the active layer. Obviously, the C60 thin film and the oxidized layer play an important role as blocking layers that prevent the diffusion of metal atoms into the active layer, resulting in the higher stability.

• 2013-01-25

著者

• Ozaki Masanori

  Division Of Cardiovascular And Respiratory Medicine Department Of Internal Medicine Kobe University

• Fujii Akihiko

  Division Of Electrical Electronic And Information Engineering Osaka University

• Hori Tetsuro

  Division Of Electrical Electronic And Information Engineering Graduate School Of Engineering Osaka U

• Fukumura Kaoru

  Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan

• Masuda Tetsuya

  Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan

• Shimizu Yo

  Research Institute for Ubiquitous Energy Devices, Kansai Center, National Institute of Advanced Industrial Science and Technology, Ikeda, Osaka 563-8577, Japan

• Kamikado Toshiya

  Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan

• Dao Quang

  Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan

• Nekelson Fabien

  Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan

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