High performance airbrush spray coated organic solar cells via tuning the surface tension and saturated vapor pressure of different ternary solvent systems |
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| Affiliation: | 1. CENTI, Centre for Nanotechnology and Smart Materials, Famalicão, Portugal;2. Ynvisible, Rua Mouzinho de Albuquerque 7, Cartaxo 2070-104, Portugal;1. HLJ Province Key Laboratories of Senior-education for Electronic Engineering, Heilongjiang University, Harbin 150080, China;2. Communication and Electronics Engineering Institute, Qiqihar University, Qiqihar 161006, China;3. School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China;1. School of Electronics Engineering, VIT University, Vellore, 632014, Tamil Nadu, India;1. Department of Chemistry Education, Graduate Department of Chemical Materials, and Institute for Plastic Information and Energy Materials, Pusan National University, Busan, 609-735, Republic of Korea;2. Advanced Functional Thin Films Department, Korea Institute of Materials Science (KIMS),797 Changwondaero, 641-831, Republic of Korea;3. Department of Display and Semiconductor Physics, College of Science and Technology, Korea University Sejong Campus 2511 Sejong-ro, Sejong City 339-770, Republic of Korea?;4. Professional Graduate School of Flexible and Printable Electronics, Department of Flexible and Printable Electronics, Chonbuk National University, Jeonju 561-756, Republic of Korea;1. Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro (373-1 Guseong-dong), Yuseong-gu, Daejeon 305-701, Republic of Korea;2. Graduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea;3. Department of Physics and Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, Republic of Korea |
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| Abstract: | In this work, thieno 3,4-b] thiophene/benzodithiophene (PTB7): 6,6]-phenyl C71-butyric acid methyl ester (PC71BM) based organic solar cell (OSC) with a new record of power conversion efficiency (PCE) of ～7.62% has been realized using airbrush spray (AS) coating method in air ambient which can be well compatible with large-scale fabrication. By investigating the physical mechanism of AS coated blend films, a series of ternary solvent systems (TSS) are used to simultaneous optimize the surface tension and the saturated vapor pressure of solution. Therefore, different TSS further controls the morphology of PTB7:PC71BM blend films precisely and systematically. It is elucidated that the chlorobenzene (CB)/o-Xylene (o-Xy)/1, 8-diiodoctane (DIO) TSS with a ratio of 37:60:3 vol.% could lead to a homogeneous surface morphology with a decreased aggregation domain size of active layer. In addition, the high fill factor, increased PC71BM absorption and internal quantum efficiency indicate the formation of bicontinuous interpenetrating and fully percolated networks with nanostructured phase separation in BHJ blend films. Ultimately, the AS coated OSCs based on the TSS of CB/o-Xy/DIO gains a 34% enhancement in PCE, compared with the conventional CB/DIO solvent based OSCs. |
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| Keywords: | Organic solar cell (OSC) Airbrush spray coating Ternary solvent system Surface tension Saturated vapor pressure |
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