Toin University of Yokohama
Project professor

Peccell Technologies, Inc.
CEO

Prof. Tsutomu Miyasaka

The energy conversion efficiency of the perovskite solar cells has achieved 26 %, equivalent to a single crystal Si solar cell, and 34 % for Si-perovskite tandem cells. Lightweight, flexible large-area modules can be produced by low-cost solution processes (printing method). In the industry, applications are not only for solar power generation but also for indoor IoT devices which enabled extremely high efficiency at 34 %. This lecture will focus on high voltage performance of perovskite semiconductors in comparison with Si semiconductors. While introducing the production technology of lightweight plastic film-based solar cells, recent trend of technology by using various passivation materials for enhancing efficiency and stability will be introduced.

RIKEN Center for Advanced Photonics
Innovative Photon Manipulation Research Team
Team Leader

RIKEN Cluster for Pioneering Research
Metamaterials Laboratory
Chief Scientist

Tokushima University
Institute of Post-LED Photonics
Special Appointed Professor

Ph.D. Takuo Tanaka

Takuo Tanaka received his PhD degree in 1996 from Osaka University. After that, he joined faculty of Engineering Science, Osaka University as an assistant professor. In 2003, he moved to RIKEN as a research scientist in Nanophotonics Laboratory. He was promoted to associate chief scientist as a head of Metamaterials Laboratory in 2008 and to chief scientist in 2017. From 2014, he is concurrently heading "innovative photon manipulation research team" in RIKEN Center for Advanced Photonics as a team leader. His research background is three-dimensional microscopy such as confocal microscope and two-photon microscope. Recently, he is studying about nanophotonics, plasmonics, and metamaterials fields with developing many new nanofabrication techniques. He has also experimental and theoretical experiences about high precision optical measurements and spectroscopy.

Metamaterials are man-made materials that modify the optical properties of substances using artificially engineered structures that are finer than the wavelength of light. While metamaterials are structured entities, by designing and fabricating their subwavelength structures, each individual structure becomes imperceptible to light waves. As a result, the entire metamaterial behaves as a homogeneous materials. Metasurfaces are two-dimensional metamaterials, where the metamaterial structure is only processed onto the surface of substrate or object. Due to their ease of fabrication, research and development of metasurfaces have recently been thriving. In this presentation, after the brief overview of metamaterials, metasurface light absorber using and its application for high-sensitive molecular detection devices and recent advancements of other metasurface devices such as "metalens", which is lenses made by metasurfaces, will be introduced.