1) “Defect study for CIGSSe with CsF-PDT”, Takeaki Sakurai, European Material Research Society (E-MRS) 2020 Spring Meeting, Strasbourg, France, May 2020 (confirmed).
2) “Investigation of electrical properties in highly efficient Cu(In,Ga)(S,Se)2 based thin film solar cells” Takeaki Sakurai, The 76th Summer Annual Conference of the Korean Vacuum Society, Vivaldi Park, Seoul, Korea, Aug.13, 2019.
3) “Characterization of interface properties at organic–organic heterojunction using synchrotron based spectroscopy”, Takeaki Sakurai, Alexandre L. Foggiatto, Hiroki Suga Yasuo Takeichi, Kanta Ono, Kazuhiko Mase, Yoshio Takahashi, Interdisciplinary Workshop on Thin Films & Photonics and Organic Electronics (TF-POE2018), Shangdong University, China, Oct.10, 2018
4) “Impact of gap states on electrical structure of subphthalocyanine acceptor based solar cells” Takeaki Sakurai, Alexandre Foggiatto L., Kazuhiko Mase, The 9th International Conference on Technological Advances of Thin Films & Surface Coatings (ThinFilms 2018), Shenzhen, China, July 20, 2018
5) “Study of Defects in Cu(In,Ga)(S,Se)2-based Solar Cells”, Takeaki Sakurai, Katsuhiro Akimoto The International Union of Materials Research Societies-International Conference on Electronic Materials (IUMRS-ICEM), Daejon, South Korea, Aug. 24, 2018
6) Takeaki Sakurai, “Impact of deep defects in Cu(In,Ga)Se2 based solar cells”, DPG (Deutsche Physikalische Gesellschaft) Conferences 2017, Technical University of Dresden, Germany, Mar.20, 2017
7) Takeaki Sakurai, “Characterization of carrier recombination processes in Cu(In,Ga)Se2 solar cells”, Grobal PhotoVoltaic Conference (GPVC 2017), Kimdaejung Convention Center, Gwangju, Korea, Mar.15, 2017
8) Takeaki Sakurai, “Characterization of carrier recombination processes in Cu(In,Ga)Se2 solar cells”, International Conference on Technologically Advanced Materials and Asian Meeting on Ferroelectricity, University of Delhi, India, Nov.7, 2016
9) Takeaki Sakurai, “Study of Defects in Widegap CIGS Solar Cells”, The International Union of Materials Research Societies-International Conference on Electronic Materials (IUMRS-ICEM), Suntec, Singapore, Jul.7, 2016
10) ”Influence of buffer layers on energy-level alignment in organic thin-film solar cells”, T.Sakurai, SPIE Photonics Europe, 2014/4/15, Brussels, Belgium.
11) ”Electrical and optical characterization of compound semiconductors for solar cells”, T.Sakurai，19th International Conference on Ternary and Multinary Compounds, 2014/9/2, Niigata, Japan.
12) ”Study of energy level alignment at electrode interfaces in organic solar cells” T.Sakurai, Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2014), 2014/12/9, Hawaii, USA.
13) ”Characterization of Deep Defect States in Cu(In,Ga)Se2”, T.Sakurai, A.Gupta, A.Yamada, S.Ishizuka, S.Niki, and K.Akimoto, 2013 MRS Spring Meeting, 2013/4/3, San Francisco, USA.
14)”Study of carrier recombination processes in Cu(In,Ga)Se2”, T.Sakurai, A.Gupta, A.Yamada, S.Ishizuka, S.Niki, and K.Akimoto, The 3rd International Conference on CIGS Solar Cells and Electronic Materials, 2013/5/20, Taipei, Taiwan.
15) ”Defect Physics of Cu(In,Ga)Se2 and Impact on Solar Cell Performance”, T.Sakurai, BIT's 2nd Annual World Congress of Advanced Materials-2013 (WCAM-2013), 2013/6/5, Suzhou, China.
16) “Defect physics of Cu(In,Ga)Se2 materials and impact on solar cell peformance”T.Sakurai, The 2nd International Conference on CIGS Solar Cells and Electronic Materials, October 15, 2012, Taipei, Taiwan.
17) “Interface control of small molecule-based organic solar cells” T.Sakurai, 2011 Workshops on Nanotechnology and Solar Cells & Green Chemical Processes and Materials, June 18, 2011, Taisan, Taiwan.
18) “Control of properties of molecule/electrode interfaces in high-efficient organic solar cells”, T.Sakurai, The 5th International Conference on Technological Advances of Thin Films & Surface Coatings, July 14, 2010, Harbin, China
19) “Characterization of Defect States in Cu(In,Ga)Se2-based Solar Cells”, T. Sakurai, 2009 Workshops on Nanotechnology and Solar Cells & Green Chemical Processes and Materials, March 7, 2009 Ming Chi University of Technology, Taiwan.
20) “Electrical Characterization of Defect States in Cu(In,Ga)Se2 Thin Films”, T.Sakurai et al., The 4th International Conference on Technological Advances of Thin Films & Surface Coatings, July 16, 2008 Singapore.
Invited Lectures (International)