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Quantum Energy Processes Lab
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A lab that makes materials that convert energy by making use of the interaction between light and matter.
AboutAbout the lab
Converting energy with light and matter.
The Quantum Energy Processes Lab studies energy-related materials that make use of the interaction between light and matter.
The lab designs new materials and processes that can efficiently extract the energy of light shining on organic molecules or inorganic semiconductors as useful work, such as light emission or electricity generation.
It conducts basic research on building nanoscale structures from organic and inorganic materials and bringing out functions such as light harvesting, polarization of light, photoelectric conversion, charge transport and storage, and light emission.
Key terms
- Photoelectric conversion
- Converting the energy of light into electricity. Solar cells are an example
- Circularly polarized light
- Light in which the direction of oscillation of the light wave rotates helically as it travels. It can be right-handed or left-handed
- Chiral
- The property of having a shape that cannot be superimposed on its mirror image, like a right hand and a left hand
NewsLab news
A paper from the lab selected as a Supplementary Journal Cover of J Phys Chem Lett
A paper from the lab selected as a Supplementary Journal Cover of ACS Appl Nano Mater
The origin of the amplified chiral optical signals shown by silica is elucidated
Assistant Professor Yutaka Okazaki received the Young Scientist Lecture Award at the Polymer Research Meeting (Kobe)
ResearchResearch themes
The lab studies energy conversion systems that use light. It designs organic–inorganic hybrid nanostructures, investigates their electronic structures and optical properties, and aims to apply them to solar cells, photocatalysts, and light-emitting devices.
*Illustrative imageNanostructures combining organic and inorganic materials
The lab designs and fabricates nanoscale structures that combine organic molecules and inorganic semiconductors, analyzes their electronic structures, and investigates their optical properties.
*Illustrative imageApplications to solar cells and light-emitting devices
The nanostructures the lab makes are applied to photoelectric conversion devices such as solar cells and photocatalysts, and to light-emitting devices. The aim is to efficiently extract the energy obtained after light irradiation as electricity generation or light emission.
*Illustrative imageCreating circularly polarized light that changes over time
By stacking two kinds of films with different luminescence lifetimes together with a retardation film, the lab succeeded in creating and reading out circularly polarized light that changes over time. The technique is expected to be applied to optical recording and anti-counterfeiting.
*Illustrative imageThe origin of chiral optical signals in silica
The lab found that heating helical nanosilica greatly increases chiral optical signals in the infrared region. Quantum chemical calculations showed that the origin lies in the twisted shape of the siloxane rings.
MembersFaculty
The members of the Quantum Energy Processes Lab consist of faculty (including program-specific assistant professors), doctoral students, master's students, and fourth-year undergraduates.
- ProfessorTakashi Sagawa
- Associate ProfessorKan Hachiya
- Assistant ProfessorYutaka Okazaki
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Quantum dots 2” Marc Vidal / CC BY-SA 4.0 (cropped)
- Nanostructures combining organic and inorganic materials: “Perovskite unit cell” Sevhab / CC BY-SA 4.0 (cropped)
- Applications to solar cells and light-emitting devices: “3mm LED Orange Clear” Mister rf / CC BY-SA 4.0 (cropped)
- Creating circularly polarized light that changes over time: “Circular.Polarization.Circularly.Polarized.Light With.Components Left.Handed” Dave3457 / Public domain (cropped)
- The origin of chiral optical signals in silica: “5000-x-magnification-of-silica-particles” Borisbeardy / CC BY-SA 4.0 (cropped)
- Related lab (Functional Construction Lab): “Large sample AFM VEGA” AAMonitor96 / CC BY-SA 3.0 (cropped)
- Related lab (Functional Systems Design Lab): “Nondestructive inspection, Finding the cracks 130806-F-JF989-080” Senior Airman Benjamin Stratton / Public domain (cropped)
- Related lab (Quantum Materials Lab): “Samsonite crystal structure (model ball and stick)” Ra'ike (Wikipedia) / CC0 (cropped)
- Related lab (Energy Conversion Engineering Lab): “Casing of a main circulation pump from the Greifswald Nuclear Power Plant” Siarhei Besarab / CC BY-SA 4.0 (cropped)
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