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Yamaguchi Lab
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A lab pursuing basic research from nanostructures such as quantum dots toward next-generation optoelectronic devices.
AboutAbout the lab
From the nano world to next-generation optoelectronic devices.
Together with the Miyashita Lab, the Yamaguchi Lab conducts basic research toward developing new next-generation optoelectronic nanodevices, through the creation of nanometer-sized materials and the evaluation and analysis of their properties.
The central theme is quantum dot structures that confine electrons and holes in three dimensions.
The lab studies how to fabricate quantum dots and quantum nanowires and their optoelectronic properties, and researches applications to semiconductor lasers, solar cells, single-photon sources, and more.
On the lab's website, the Yamaguchi Lab, the Miyashita Lab, and the Kaizu Lab are introduced together.
Key terms
- Quantum dot
- A nanometer-sized semiconductor structure that confines electrons and holes in three dimensions.
- Quantum nanowire
- Also called a quantum wire, a thin, wire-like semiconductor structure of nanometer size.
- Multijunction solar cell
- A solar cell made by combining III-V semiconductors. It is expected to achieve conversion efficiency exceeding that of single-junction types made of a single material.
ResearchResearch themes
The lab investigates the crystal growth mechanisms of quantum dots and quantum nanowires and develops excellent fabrication techniques. It evaluates the optoelectronic properties of the structures it creates and explores applications to new devices such as semiconductor lasers and solar cells.
*Illustrative imageFabrication of Quantum Dots and Device Applications
While gaining insight into crystal growth by investigating how quantum dots and quantum nanowires form, the lab develops fabrication techniques. It evaluates the optoelectronic properties of the structures it creates and researches applications to semiconductor lasers, solar cells, single-photon sources, mid-infrared light-emitting devices, and more.
*Illustrative imageIn-House Scanning Probe Microscopes
To explore new physical properties at the nanoscale and atomic scale, the lab also researches and develops new scanning probe microscopes. Research and development of the processes and evaluation equipment needed for nanotechnology is another of its themes.
*Illustrative imageMultijunction Solar Cells and Evaluation Methods
The Miyashita Lab, jointly with the Yamaguchi Lab, develops technologies related to multijunction solar cells combining III-V semiconductors and to other unique solar cells. The lab also works on original evaluation methods.
MembersFaculty
The members of the Yamaguchi Lab consist of faculty members, doctoral, master's, and undergraduate students, and a secretary.As of 2025
- ProfessorKoichi Yamaguchi
VoicesStudent voices
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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: “U.S. Department of Energy - Science - )” U.S. Department of Energy from United States / Public domain (cropped)
- Fabrication of Quantum Dots and Device Applications: “Lab Mol Colloidal quantum dots 02” Lab mol (Ilia Litvinov) / CC BY 4.0 (cropped)
- In-House Scanning Probe Microscopes: “Atomic force microscope by Zureks” Zureks / CC BY-SA 3.0 (cropped)
- Multijunction Solar Cells and Evaluation Methods: “SOLAR ARRAY TEST SPECIMENS - DPLA - 8fa8a6b0b0f8e8aefb0f2fcc460c52b0” Martin Brown / Public domain (cropped)
- Related lab (海津 利行 研究室): “Quantum Dots” Brandon CP BMED / CC BY-SA 3.0 (cropped)
- Related lab (中村 淳・新𠮷 直樹 研究室): “DV74HC4051 CMOS 1996 (01)” Retired electrician / CC0 (cropped)
- Related lab (篠原 百合 研究室): “Magnetic fields; Transmission electron microscope ( )” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (沈
青 研究室): “Sargent Group quantum dot solar cell” Lukasz Brzozowski / CC BY-SA 3.0 (cropped)
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