Keynote Speakers

Dr. Miwako Hosoda, Vice-President of Seisa University, has been doing her sociological research in the field of healthcare and environmental sciences. She is interested in the balance of human activities and advocates the protection of natural environments. Dr. Hosoda is also working to achieve a sustainable healthcare policy, and promotes the public's participation in the medical domain, both globally and locally. She graduated from the Department of Sociology at the University of Tokyo in 1992, and received an MA and PhD in Sociology from the University of Tokyo. After spending time as a research fellow in the Japan Society for the Promotion of Science, she studied at Columbia University Mailman School of Public Health and Harvard School of Public Health. Dr. Hosoda is now serving as a board member for the International Sociological Association, Research Committee of Sociology on Health.

Prof. Miwako Hosoda, Seisa University, Tokyo, Japan

Prof. Park Chan Jin graduated from Korea University, and got Master and PhD degrees in same university. His major fields of research are the air pollution control, greenhouse gas technology and odor management technology. His another interests is green growth policy. He is now full-professor in Incheon National University at Urban and Environmental Engineering School. Recent research areas are odor pollution control technology, hazardous chemical management and policy of countermeasures against climate change.

Prof. Chan Jin Park, Incheon National University, Republic of Korea

Wallace Choy received Ph.D Degree in Electronic Engineering from University of Surrey, UK in 1999. After vigorous working experiences in National Research Council of Canada and Fujitsu at San Jose, on investigating optoelectronic devices, he is now a professor of Department of Electrical and Electronic Engineering, the University of Hong Kong. His current research interests are concerned with organic/inorganic optoelectronic devices, plasmonic structures, and nano-material devices and physics. Prof. Choy has been recognized as the Top 1% of most-cited scientists in Thomson Reuter's Essential Science Indicators (ESI) in 2014, 2015, 2016 and 2017. He has been named as prolific researcher on organic solar cells in the index (WFC in physical sciences) in Nature Index 2014 Hong Kong published by Nature. He has published over 180 internationally peer-reviewed journal papers, contributed to seven book chapters, US and China patents and edited one book published in Springer. He has served as Member of Engineering panels of Hong Kong Research Grant Council, Editorial Board Member for Nature Publishing Group on Scientific Reports, Wiley on Solar RRL and Institute of Physics on J Physics D, senior editor of IEEE Photonics Journal, topical editor of OSA Journal of the Optical Society of America B, and guest editor of OSA Journal of Photonic Research, and Journal of Optical Quantum Electronics. He is a fellow of OSA

Prof. Wallace C.H. Choy, Hong Kong University, Hong Hong

Keynote Speech Title: Highly Stable and Efficient Thin-Film Photovoltaic Devices
Abstract: While high temperature evaporation and sputtering are commonly used for fabricating solar cells, we will discuss our simple and scalable solution-processed solar cells including the carrier transport layers to the active layers. We will demonstrate that our metal oxide based carrier transport layers with the good electron and hole transport properties can be used to form all solution-processed organic/inorganic optoelectronics such as organic solar cells (OSCs), perovskite solar cells, dye sensitized solar cells, organic light emitting diodes, etc which can favor the efficient transport of carriers between the photoactive layer and electrode as well as high optical transparency. Transition metal oxides are promising materials for carrier transport layers because of their good electrical properties, stability, and optical transmission. We also propose and demonstrate several low-temperature solution-processed approaches for forming transparent and efficient metal oxide-based carrier transport layers including electron and hole transport layers. With the incorporation of metal nanoparticles, the electrical and optical properties can be enhanced. The interesting features of the novel carrier extraction layers are low temperature, solution process and water free for high performance optoelectronics such as OSCs with power conversion efficiency (PCE) of 10.5%. In addition, we have developed some room-temperature processed Ag nano-network which can serve as transparent flexible electrodes. With the knowledge of solution processed organic and inorganic materials, we also propose different approaches for highly stable and efficient perovskite SCs with no hysteresis and most recent PCE of 20.5%.

Kokyo Oh is a senior researcher in Center for Environmental Science in Saitama, Japan. He graduated with his MSci degree and Ph.D. degree (soil science) in Chinese Academy of Sciences, and was honored as a STA research fellow by Japan government from 1997 to 1999. The research areas include soil science, environmental conservation, environmental chemistry, and atmospheric environment. His current research is mainly on soil remediation, environmental agronomy, atmospheric PM2.5 and water environment conservation. He has published more than 90 publications.

Prof. Kokyo Oh, Center for Environmental Science in Saitama, Japan