Research on fundamental technologies for a tracking-free, highly-efficient concentrator photovoltaic system

• Project/Area Number: 26630499
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Energy engineering
• Research Institution: Ritsumeikan University
• Principal Investigator: Fujieda Ichiro 立命館大学, 理工学部, 教授 (90367996)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 蛍光 / 太陽光発電 / ディスプレイ / 発電 / レーザー / 自己吸収 / 液晶 / 日影曲線 / 色素 / 異方性 / コントラスト / 電気双極子

Outline of Final Research Achievements

A Luminescent Solar Concentrator (LSC) is expected to reduce the cost of power generation drastically because its solar cells are much smaller and a sun-tracking system is not required. To improve its efficiency, I have applied the guest-host technology for an LSC. Control of its photoluminescence (PL) characteristics enables the PL photons to reach solar cells more efficiently. I have modeled this process based on a tilted electric dipole and reproduced the experiment successfully. Furthermore, I have invented an energy-harvesting device that displays an image by projecting a laser beam on an LSC and demonstrated its operation.

Research Products

• [Journal Article] Energy-harvesting laser phosphor display and its design considerations (2017)
  • Author(s): Ichiro Fujieda, Shunsuke Itaya, Masamichi Ohta, Yuuki Hirai, Takamasa Kohmoto
  • Journal Title: J. Photon. Energy Volume: 7 Issue: 2 Pages: 28001-28001
  • DOI: 10.1117/1.jpe.7.028001
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Characterization of a liquid crystal/dye cell for a future application in display-integrated photovoltaics (2016)
  • Author(s): Ichiro Fujieda, Shunsuke Itaya, Masamichi Ohta, Shintaro Ozawa, Nada Dianah Binti M Azmi
  • Journal Title: J. Photon. Energy Volume: 6 Issue: 2 Pages: 28001-28001
  • DOI: 10.1117/1.jpe.6.028001
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Measurement of photoluminescence from a twisted-nematic liquid crystal/dye cell for an application in an energy-harvesting display (2016)
  • Author(s): Masamichi Ohta, Shunsuke Itaya, Shintaro Ozawa, Nada Dianah Binti M. Azmi, Ichiro Fujieda
  • Journal Title: Proc. of SPIE Volume: 9937 Pages: 99370R-99370R
  • DOI: 10.1117/12.2237454
  • Acknowledgement Compliant
• [Journal Article] Measurement of photoluminescence spreading in an LC/Dye Cell (2016)
  • Author(s): Shintaro Ozawa, Masamichi Ohta, Shunsuke Itaya, and Ichiro Fujieda
  • Journal Title: Proc. of 23rd International Display Workshops Volume: 23 Pages: 180-183
  • Acknowledgement Compliant
• [Journal Article] A model incorporating self-absorption for a display-integrated photovoltaic system (2016)
  • Author(s): Ichiro Fujieda
  • Journal Title: Proc. of 23rd International Display Workshops Volume: 23 Pages: 184-187
  • Acknowledgement Compliant
• [Journal Article] Feasibility study on the use of liquid crystal/dye cells for digital signage (2016)
  • Author(s): Shunsuke Itaya, Nada Dianah Binti M. Azmi, Masamichi Ohta, Shintaro Ozawa, Ichiro Fujieda
  • Journal Title: Proc. SPIE Volume: 9770 Pages: 977004-977004
  • DOI: 10.1117/12.2212302
  • Acknowledgement Compliant
• [Journal Article] Edge emission patterns from an LC/Dye cell (2015)
  • Author(s): Shunsuke Itaya, Nada Dianah Binti M Azmi, Masamichi Ohta, Shintaro Ozawa, and Ichiro Fujieda
  • Journal Title: Proc. of 22nd International Display Workshops Volume: 22 Pages: 136-139
  • Acknowledgement Compliant
• [Journal Article] Tilted dipole model for bias-dependent photoluminescence pattern (2014)
  • Author(s): Ichiro Fujieda, Daisuke Suzuki, and Taishi Masuda
  • Journal Title: J. Appl. Phys. Volume: 116 Issue: 22 Pages: 224507-224507
  • DOI: 10.1063/1.4904064
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Anisotropic photoluminescence from an LC-dye system (2014)
  • Author(s): Taishi Masuda, Takumi Kamimura, Shunsuke Itaya and Ichiro Fujieda
  • Journal Title: Proc. of 21st International Display Workshops Volume: 21 Pages: 36-39
  • Acknowledgement Compliant
• [Journal Article] Tilted dipole model for an LC-dye system (2014)
  • Author(s): Ichiro Fujieda
  • Journal Title: Proc. of 21st International Display Workshops Volume: 21 Pages: 73-74
  • Acknowledgement Compliant
• [Presentation] 日影曲線上に蛍光体を配置した集光型太陽光発電 (2017)
  • Author(s): 奥山 真光，太田 正倫，ビンティ エム アズミ ナダ ディアナ，水野 敬規，藤枝 一郎
  • Organizer: 第64回応用物理学会春季学術講演会
  • Place of Presentation: パシフィコ横浜（神奈川県横浜市西区）
  • Year and Date: 2017-03-17
• [Presentation] 液晶/色素セル内での光の反射による複数の発光点の発生 (2017)
  • Author(s): 高本 享昌，太田 正倫，藤枝 一郎
  • Organizer: 第64回応用物理学会春季学術講演会
  • Place of Presentation: パシフィコ横浜（神奈川県横浜市西区）
  • Year and Date: 2017-03-17
• [Presentation] Measurement of photoluminescence spreading in an LC/Dye Cell (2016)
  • Author(s): Shintaro Ozawa, Masamichi Ohta, Shunsuke Itaya, and Ichiro Fujieda
  • Organizer: 23rd International Display Workshops
  • Place of Presentation: 福岡国際会議場（福岡県福岡市博多区）
  • Year and Date: 2016-12-08
  • Int'l Joint Research
• [Presentation] A model incorporating self-absorption for a display-integrated photovoltaic system (2016)
  • Author(s): Ichiro Fujieda
  • Organizer: 23rd International Display Workshops
  • Place of Presentation: 福岡国際会議場（福岡県福岡市博多区）
  • Year and Date: 2016-12-08
  • Int'l Joint Research
• [Presentation] Measurement of photoluminescence from a twisted-nematic liquid crystal/dye cell for an application in an energy-harvesting display (2016)
  • Author(s): Masamichi Ohta, Shunsuke Itaya, Shintaro Ozawa, Nada Dianah Binti M. Azmi, Ichiro Fujieda
  • Organizer: the conference on Next Generation Technologies for Solar Energy Conversion VII, a part of the SPIE Optics + Photonics
  • Place of Presentation: San Diego (USA)
  • Year and Date: 2016-08-31
  • Int'l Joint Research
• [Presentation] 液晶/色素セルの端面から放射される蛍光のスペクトルの変化 (2016)
  • Author(s): 小澤慎太郎，板屋竣介，太田正倫，Nada Dianah Binti M Azmi，藤枝一郎
  • Organizer: 第63回 応用物理学会春季学術講演会
  • Place of Presentation: 東京工業大学，東京都目黒区
  • Year and Date: 2016-03-22
• [Presentation] TN配向の液晶/色素セルの蛍光の放射パターン (2016)
  • Author(s): 太田正倫，板屋竣介，小澤慎太郎，Nada Dianah Binti M Azmi，藤枝一郎
  • Organizer: 第63回 応用物理学会春季学術講演会
  • Place of Presentation: 東京工業大学，東京都目黒区
  • Year and Date: 2016-03-22
• [Presentation] Feasibility study on the use of liquid crystal/dye cells for digital signage (2016)
  • Author(s): Shunsuke Itaya, Nada Dianah Binti M. Azmi, Masamichi Ohta, Shintaro Ozawa, Ichiro Fujieda
  • Organizer: the conference on Advances in Display Technologies VI, a part of SPIE Photonics West
  • Place of Presentation: Moscone Center, San Francisco, California, U.S.A.
  • Year and Date: 2016-02-18
  • Int'l Joint Research
• [Presentation] Edge emission patterns from an LC/Dye cell (2015)
  • Author(s): Shunsuke Itaya, Nada Dianah Binti M Azmi, Masamichi Ohta, Shintaro Ozawa, and Ichiro Fujieda
  • Organizer: 22nd International Display Workshops
  • Place of Presentation: 大津プリンスホテル，滋賀県大津市
  • Year and Date: 2015-12-10
  • Int'l Joint Research
• [Presentation] 色素分子の配向とV字構造が蛍光の閉じ込めに与える影響 (2015)
  • Author(s): 板屋俊介，Nada Dianah Binti M Azmi，藤枝一郎
  • Organizer: 第76 回応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場，愛知県名古屋市熱田区
  • Year and Date: 2015-09-13
• [Remarks] 画像情報機器研究室
  • URL: http://www.ritsumei.ac.jp/se/re/fujiedalab/
• [Remarks] 「発電するディスプレイ」 立命館大学 理工学部 電気電子工学科 教授 藤枝一郎
  • URL: https://www.youtube.com/watch?v=donBdSBM7O4
• [Patent(Industrial Property Rights)] 発電モジュールおよび発電装置 (2017)
  • Inventor(s): 藤枝一郎
  • Industrial Property Rights Holder: 学校法人 立命館
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2017-058006
  • Filing Date: 2017-03-23
• [Patent(Industrial Property Rights)] 発電モジュールおよび発電装置 (2017)
  • Inventor(s): 藤枝一郎
  • Industrial Property Rights Holder: 学校法人 立命館
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2017-064452
  • Filing Date: 2017-03-29
• [Patent(Industrial Property Rights)] 発電装置および発電システム (2016)
  • Inventor(s): 藤枝一郎
  • Industrial Property Rights Holder: 学校法人 立命館
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2016-064682
  • Filing Date: 2016-03-28