Optimization of high-efficiency multi-junction solar cells through homogeneous luminescent coupling effect

• Project/Area Number: 19J13877
• Research Category: Grant-in-Aid for JSPS Fellows
• Allocation Type: Single-year Grants
• Section: 国内
• Review Section: Basic Section 21050:Electric and electronic materials-related
• Research Institution: The University of Tokyo
• Principal Investigator: YU JECO BERNICE MAE (2020) 東京大学, 大学院工学系研究科(工学部), 特別研究員(PD)
• Research Fellow: YU JECO BERNICE MAE (2019) 東京大学, 工学系研究科, 特別研究員(DC2)
• Project Period (FY): 2019-04-25 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥1,700,000 (Direct Cost: ¥1,700,000); Fiscal Year 2020: ¥800,000 (Direct Cost: ¥800,000); Fiscal Year 2019: ¥900,000 (Direct Cost: ¥900,000)
• Keywords: luminescent coupling / perovskite / quantum dot / solar cell / photonics / optoelectronics / concentrator solar / light recycling / multijunction solar cell / passivation / luminescence / photovoltaics

Outline of Research at the Start

The project will be implemented in the following order:
1. dip coating of all-inorganic PQDs on III-V on IV MJSCs
2. electrical and optical performance evaluation
3. data analysis and interpretation

Outline of Annual Research Achievements

There are three pathways to possibly homogenize and increase current collection in a limiting cell of a III-V multijunction solar cell (MJSC) device - one is by growing smaller active area of the top cell, another is by electrical sidewall passivation using thin-film dielectrics, and the other is by photo-passivation of shunt defects in MJSCs using all-inorganic perovskite quantum dots (PQDs) with amorphous thermoplastic film. The electrical sidewall passivation was experimentally observed to homogenize and increase current collection in a subcell benefitting from the luminescent coupling (LC) effect. Hence, the electrical sidewall passivation of full MJSC devices is an additional step recommended in fabricating high-efficiency MJSCs with homogeneous current production, just after the fabrication of the semiconductor stack or after electrode fabrication, provided that the electrodes are masked during passivation layer growth. The PQD-amorphous thermoplastic films on a full III-V MJSC device successfully demonstrated current redistribution from the top cell into its lower subcells. Thus, for enhanced MJSC current matching, it is recommended to use an optimized photo-assistive layer like PQD-amorphous thermoplastic films. Applying these solutions may reach the conversion efficiency increase by 1.35% in MJSCs.

Research Progress Status

令和2年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和2年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] University of San Agustin(フィリピン)
• [Journal Article] Efficient Perovskite Solar Modules with Minimized Nonradiative Recombination and Local Carrier Transport Losses (2020)
  • Author(s): Ren, A., Lai, H., Hao, X., Tang, Z. Xu, H., Yu Jeco, B.M., Watanabe, K., Wu, L., Zhang, J., Sugiyama, M., Wu, J., Zhao D.
  • Journal Title: Joule Volume: 4(6) Issue: 6 Pages: 1263-1277
  • DOI: 10.1016/j.joule.2020.04.013
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Application of perovskite quantum dots in carrier redistribution in III-V multijunction solar cells with luminescent coupling effect (2020)
  • Author(s): Yu Jeco-Espaldon, B.M., Haibin Wang, H., Espaldon, A., Kubo, T., Segawa, H., Ahsan, N., Okada, Y.
  • Journal Title: Application of perovskite quantum dots in carrier redistribution in III-V multijunction solar cells with luminescent coupling effect Volume: 10(4) Issue: 04 Pages: 042005-042005
  • DOI: 10.1117/1.jpe.10.042005
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Current transport efficiency analysis of multijunction solar cells by luminescence imaging (2019)
  • Author(s): H. Xu, A. Delamarre, B. M. F. Yu Jeco, H. Johnson, K. Watanabe, Y. Okada, J.-F. Guillemoles, Y. Nakano, and M. Sugiyama
  • Journal Title: Progress in Photovoltaics: Research and Applications Volume: 27 Issue: 10 Pages: 835-843
  • DOI: 10.1002/pip.3140
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Technosocial feasibility analysis of solar-powered UV-LED water treatment system in a remote island of Guimaras, Philippines (2019)
  • Author(s): Yu Jeco Bernice Mae F., Larroder Aris C., Oguma Kumiko
  • Journal Title: Journal of Photonics for Energy Volume: 9 Issue: 04 Pages: 043105-043105
  • DOI: 10.1117/1.jpe.9.043105
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The Influence of Al2O3 Passivation of III-V on Ge Multijunction Solar Cells to the Spatial Distribution of Luminescent Coupling Effect (2019)
  • Author(s): Yu Jeco Bernice Mae F.、Chikhalkar Abhinav、Giteau Maxime、Tamaki Ryo、Ahsan Nazmul、King Richard R.、Okada Yoshitaka
  • Journal Title: Proceedings of the 46th IEEE Photovoltaic Specialists Conference (PVSC-46) Volume: 1 Pages: 1078-1082
  • DOI: 10.1109/pvsc40753.2019.8980895
  • Int'l Joint Research
• [Presentation] Design of concentrator multijunction solar modules for UV-LED disinfection of water in off-the-grid areas (2020)
  • Author(s): O Yu Jeco, B.M., Espaldon, A., Sado, T., Watanabe, K., Oguma, K. and Okada, Y.
  • Organizer: IEEE 47th Photovoltaic Specialists Conference (PVSC)
  • Int'l Joint Research
• [Presentation] Luminescence imaging of III-V multijunction solar cells with luminescent coupling effect (2020)
  • Author(s): O Yu Jeco, B.M., Xu, H., Sugiyama, M. and Okada, Y.
  • Organizer: IEEE 47th Photovoltaic Specialists Conference (PVSC)
  • Int'l Joint Research
• [Presentation] Cyclic Olefin Copolymer (COC) as Moisture Barrier for All-Inorganic Perovskite Quantum Dots on III-V Optoelectronic Materials (2020)
  • Author(s): Yu Jeco, Bernice Mae F.
  • Organizer: 6th World Congress on Smart Materials 2020 (WCSM-2020)
  • Int'l Joint Research
• [Presentation] The Influence of Al2O3 Passivation of III-V on Ge Multijunction Solar Cells to the Spatial Distribution of Luminescent Coupling Effect (2019)
  • Author(s): Yu Jeco, Bernice Mae F.
  • Organizer: 46th IEEE Photovoltaic Specialists Conference (PVSC-46)
  • Int'l Joint Research
• [Remarks] LC effect in wafer-bonded III-V on Si MJSCs
  • URL: https://www.linkedin.com/feed/update/urn:li:activity:6537000264640016384/
• [Remarks] LC effect in wafer-bonded III-V on Si MJSCs
  • URL: https://www.facebook.com/SPIE.org/posts/2227713387266527
• [Remarks] LC effect in wafer-bonded III-V on Si MJSCs
  • URL: https://twitter.com/SPIEtweets/status/1125558620572278784
• [Remarks] University of Tokyo, San Ag team up to aid...
  • URL: https://dailyguardian.com.ph/university-of-tokyo-san-ag-team-up-to-aid-communal-waters-in-guimaras/
• [Remarks] University of Tokyo, San Agustin to aid...
  • URL: https://visayas.politics.com.ph/university-of-tokyo-san-agustin-to-aid-communal-waters-in-guimaras/