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Semiconductor Materials Lab
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A lab that studies materials for solar cells, photocatalysts, and power semiconductors.
AboutAbout the lab
Developing semiconductor materials for energy conversion.
The Semiconductor Materials Lab develops semiconductor materials for solar energy conversion and power electronics, and investigates their properties.
The materials it works with include nitrides, oxides, chalcogenides, perovskites, diamond, and organic semiconductors.
Its research topics are compound semiconductor solar cells, photocatalysts that split water using light, wide-bandgap semiconductors such as diamond, and organic semiconductors.
The lab also collaborates with researchers in the United States, Europe, and Asia.
Key terms
- CIGS
- An abbreviation for the compound semiconductor Cu(In,Ga)Se2. It is well suited as a material for thin-film solar cells
- Photocatalyst
- A material that drives a reaction when it receives light. One use is splitting water with sunlight to produce hydrogen
- NV center
- A defect in diamond made up of a nitrogen atom paired with a vacancy. It is expected to be applied to magnetic field sensors and quantum computing
ResearchResearch themes
The lab develops a variety of semiconductor materials for solar energy conversion and power electronics. Focusing on compound semiconductors, photocatalysts, wide-bandgap semiconductors, and organic semiconductors, it measures their structural, optical, and electrical properties.
*Illustrative imageCompound semiconductor solar cells
The lab studies defects in CIGS, a material for thin-film solar cells. How defects behave in gallium-rich films is still not well understood, so the lab investigates them by combining structural, electrical, and optical measurements.
*Illustrative imagePhotocatalysts for producing hydrogen
The lab focuses on bismuth vanadate (BiVO4) as a photocatalyst that splits water using sunlight. It works on fabricating thin films and improving the transport of charge carriers, and examines their properties using methods such as Raman spectroscopy.
*Illustrative imageWide-bandgap semiconductors (diamond)
The lab studies the solid-state physics of diamond and the properties of single defects such as NV centers. It measures the optical and electrical properties of devices such as diodes and MOSFETs using impedance spectroscopy, luminescence, and optically detected magnetic resonance.
*Illustrative imageOrganic semiconductors and organic solar cells
For organic solar cells, the lab carries out research on controlling film structure through surface modification, and on the electrical properties of the interface between organic materials and electrodes. It uses photoelectron spectroscopy to examine the relationship between interface electronic structure and performance.
MembersFaculty
The members of the Semiconductor Materials Lab consist of faculty, postdoctoral researchers, and doctoral, master's, and undergraduate students.
- ProfessorTakeaki Sakurai
- Associate ProfessorMD Monirul Islam
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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: “4 inch float zone n-type silicon wafer with amorphous silicon thin film heterojunction structure” Radiotrefoil / CC BY-SA 4.0 (cropped)
- Compound semiconductor solar cells: “Solar Power Plant of Brežice Hydroelectric Power Plant 07” Janezdrilc / CC0 (cropped)
- Photocatalysts for producing hydrogen: “Water splitting with a photocatalyst” Kavin Teenakul / CC BY-SA 4.0 (cropped)
- Wide-bandgap semiconductors (diamond): “Boron-doped diamond (BDD) electrodes” Johannes Schneider / CC BY 4.0 (cropped)
- Organic semiconductors and organic solar cells: “1inchpolymersolarcell” Aromaticmoleculessmell / CC BY 3.0 (cropped)
- Related lab (エネルギー材料・デバイス): “New Thin-Film Solar Cells Compared to Normal Solar Cells (GRC-1966-C-02754)” NASA Glenn Research Center / Public domain (cropped)
- Related lab (電子スピン共鳴分光): “Electron spin resonance spectroscopy” Bill Branson (Photographer) / Public domain (cropped)
- Related lab (磁気機能工学): “Nuclear magnetic resonance devices in CAFIA laboratory” Sarka Na kopci / CC BY-SA 4.0 (cropped)
- Related lab (スピントロニクス研究室): “Molecular-beam epitaxy system at LAAS 0509” Guillaume Paumier (user:guillom) / CC BY-SA 3.0 (cropped)
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