Abstract
Traditional power generation methods based on fossil fuels cause many environmental concerns such as global warming and climate change. Photovoltaics can produce electricity using sunlight, which is a sustainable natural energy source. Thus, photovoltaics are an attractive replacement to overcome these environmental issues and a promising option for addressing climate change. This study sought to determine photovoltaics research trends and analyze the current technology level of five major countries to inform technology development strategies.BR In this study, we collected research paper data related to photovoltaics for five major countries (Korea, USA, China, Japan, and EU). Then, we analyzed research activity and research influence, and compared these results for two periods, 2011-2014 and 2015-2019. We also extracted top 5 research institutes having high time cited figures in each country. Finally, based on an expert evaluation method (the Delphi method), we conducted quantitative and qualitative analysis on current technology level by country. The survey results included technology level, technology gap, technology level group, and R&D competency in fundamental and application development technology stages.
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