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Solution modification of PEDOT:PSS inks for ultrasonic spray coating
Affiliation:1. Department of Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield, S3 7RH, UK;2. Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, UK;1. Research Center for New Generation Photovoltaics, National Central University, Taoyuan 32001, Taiwan, ROC;2. Deaprtment of Optics and Photonics, National Central University, Taoyuan 32001, Taiwan, ROC;3. Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan, ROC;4. Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 31040, Taiwan, ROC;5. Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan, ROC;6. Department of Applied Chemistry, National Chi Nan University, Nantou 545, Taiwan, ROC;7. Department of Chemistry, National Central University, Taoyuan 32001, Taiwan, ROC;1. Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing 100044, PR China;2. Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, PR China;1. Department of Chemical & Biological Engineering, Hanbat National University, Daejeon 305-719, Republic of Korea;2. Department of Nano, Medical and Polymer Materials, Yeungnam University, Gyeongsan 712-749, Republic of Korea;1. University of Michigan-Shanghai, Jiao Tong University Joint Institute, Shanghai 200240, China;2. State Key Lab for Composite Materials, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Abstract:
PEDOT:PSS is a high-conductivity hole-transporting polymer that is widely used in polymer and perovskite photovoltaic devices, as well as in a host of other antistatic applications. Here we show that modification of PEDOT:PSS inks using ternary solvents and by the addition of small amounts of a high molecular weight polymer make it possible to deposit highly uniform thin films via ultrasonic spray coating. Such films can be deposited using a single pass in the wet phase without the use of surfactants; a process that greatly simplifies their deposition. Using this technique we create films having thickness and roughness comparable to that of spin coated films, whilst properties such as the conductivity and stability can be improved.
Keywords:Ultrasonic spray coating  PEDOT:PSS  Printable electronics  Photovoltaic-materials
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