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Writable, patternable organic solar cells and modules inspired from old Chinese calligraphy tradition

Abstract

Scalable, patternable, affordable thin-film fabrication techniques for solution-processed organic photovoltaics are highly desirable. In this work, we report a new fabrication technique inspired from old Chinese calligraphy tradition to fabricate organic solar cells and modules. The fabrication tool of “Maobi”, also called “Chinese ink brush”, has over 2000-year history and is widely used for writing and painting in old Chinese history. Via Maobi coating, thickness of the active layers and the polymer electrodes could be tuned by optimizing the coating speed and substrate temperature. Solar cells based on Maobi-coated active layers (P3HT:ICBA, PTB7-Th:PC71BM and PBDB-T:ITIC) display comparable performance to the devices with spin-coated active layers. Among them, the cells with Maobi-coated PBDB-T:ITIC active layer exhibit high power conversion efficiency of 10.1%. Furthermore, based on the inherent advantage of easy patterning of Maobi, we demonstrated Maobi-coated solar modules containing 8 sub-cells that exhibit a high open-circuit voltage (VOC) of 6.30 V and a high fill factor of 0.71. At the end, large-area solar modules (18 cm2) were demonstrated via motor-driven computer-controlled automatic Maobi coating. The module displays VOC up to 11.6 V and power conversion efficiency of 6.3%.

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Publication details

The article was received on 20 Jul 2017, accepted on 01 Dec 2017 and first published on 01 Dec 2017


Article type: Communication
DOI: 10.1039/C7MH00559H
Citation: Mater. Horiz., 2017, Accepted Manuscript
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    Writable, patternable organic solar cells and modules inspired from old Chinese calligraphy tradition

    L. Mao, B. Luo, L. Sun, S. Xiong, J. Fan, F. Qin, L. Hu, Y. Jiang, Z. Li and Y. Zhou, Mater. Horiz., 2017, Accepted Manuscript , DOI: 10.1039/C7MH00559H

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