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24 Dec 2012

Volume 101, Issue 26, Articles (26xxxx)

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Appl. Phys. Lett. 101, 263501 (2012); http://dx.doi.org/10.1063/1.4772532 (4 pages)

Youngki Yoon and Sayeef Salahuddin
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Efficiency enhancement in mesogenic-phthalocyanine-based solar cells with processing additives

Quang Duy Dao, Tetsuro Hori, Kaoru Fukumura, Tetsuya Masuda, Toshiya Kamikado, Akihiko Fujii, Yo Shimizu, and Masanori Ozaki

Appl. Phys. Lett. 101, 263301 (2012); http://dx.doi.org/10.1063/1.4773519 (3 pages)

Online Publication Date: 27 December 2012

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Bulk heterojunction (BHJ) solar cells, fabricated by spin casting processes, with phase-separated small molecules including a phthalocyanine derivative, 1,4,8,11,15,18,22,25-octahexylphthalocyanine (C6PcH2), and a fullerene derivative, 1-(3-methoxy-carbonyl)-propyl-1-1-phenyl-(6,6)C61 (PCBM), have been demonstrated to have a power conversion efficiency exceeding 4.1%. The C6PcH2:PCBM BHJ surface morphology and the phase separation have been controlled by utilizing processing additives in various solvents. The effects of the processing additives on the crystallization of the discotic C6PcH2 columns in hexagonal structures have been discussed.
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88.40.jr Organic photovoltaics
88.40.hj Efficiency and performance of solar cells
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