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Kondo Lab
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The lab grows crystals and thin films of perovskite semiconductors and studies their optical properties.
AboutAbout the lab
From crystal growth to photonic devices
The Kondo Lab studies semiconductor materials that are expected to be applied to devices that use light (photonics).
By growing single crystals from solution and making thin films in a vacuum, the lab carries out everything from crystal growth to device fabrication and evaluation.
At the center of its work are metal halide perovskite semiconductors, which are promising materials for thin-film solar cells.
The lab investigates the growth of these crystals and thin films, their optical properties, nonlinear optics, and terahertz optics.
Key terms
- Perovskite semiconductor
- A semiconductor with the same atomic arrangement as the mineral perovskite. It is promising as a material for thin-film solar cells.
- Vacuum evaporation
- A method in which a material is heated and evaporated in a vacuum so that it deposits as a thin film on a substrate. Co-evaporation uses multiple materials at the same time.
- Nonlinear optics
- A field that deals with responses that are not proportional to the intensity of light, such as the generation of light of a different wavelength when intense light is applied.
- Terahertz waves
- Electromagnetic waves with frequencies between those of radio waves and light.
NewsLab news
Paper published on perovskite double heterostructures made by vacuum co-evaporation
An undergraduate student received the Department of Materials Engineering Graduation Thesis Award and the Dean's Award of the Faculty of Engineering
ResearchResearch themes
Using methods such as growing high-quality semiconductor single crystals from solution and forming films by vacuum evaporation, the lab studies materials that are expected to be applied to semiconductor photonics. Focusing on metal halide perovskite semiconductors, the lab covers everything from the growth of crystals and thin films to the fabrication and evaluation of optical and nonlinear optical devices.
*Illustrative imageNonlinear optics of ferroelectric perovskites
The lab irradiated single crystals of a halide perovskite that is ferroelectric at room temperature (CsGeI3) with near-infrared laser light, and showed that terahertz waves are emitted through a strong nonlinear optical response.
*Illustrative imageMeasuring the lattice constants and thermal expansion of mixed crystals
For mixed crystals of halide perovskites, the lab accurately measured the spacing between atoms (the lattice constant) and the expansion and contraction with temperature, using single crystals. This is joint research with Shibaura Institute of Technology.
*Illustrative imageGrowing thin films on single crystals
The lab is working on making heteroepitaxial thin films by depositing halide perovskite thin films, which are expected to be applied to light-emitting and light-detecting devices, onto single crystals.
*Illustrative imageMaking all-inorganic perovskite thin films
This research uses vacuum co-evaporation to make high-quality thin films of an all-inorganic halide perovskite (CsSnBr3), which is expected to offer long-term stability and high environmental compatibility.
MembersFaculty
The members of the Kondo Lab are faculty, master's students, and undergraduate students.As of 2026
- ProfessorTakashi KondoPublications ↗
- Assistant ProfessorMasato SotomePublications ↗
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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: “Perovskite solar cell” Dennis Schroeder / National Renewable Energy Laboratory / Public domain (cropped)
- Nonlinear optics of ferroelectric perovskites: “Femtosecond Laser and Pulse Compressor - Optics Lab - INRIM” Giorgio Brida from Torino, Italy / CC BY 2.0 (cropped)
- Measuring the lattice constants and thermal expansion of mixed crystals: “Rectangular perovskite crystal in Petri dish” Kttimliu / CC BY-SA 4.0 (cropped)
- Growing thin films on single crystals: “Perovskite domain structure” Furasova / CC BY 4.0 (cropped)
- Making all-inorganic perovskite thin films: “Perovskite tin solar cell ( )” University of Oxford Press Office / CC BY 2.0 (cropped)
- Related lab (Kita Lab): “SiC wafers 6inch” FDominec / CC BY-SA 4.0 (cropped)
- Related lab (Shimogaki Lab): “Multicrystalline silicon wafer with thin film iridescence” Radiotrefoil / CC BY-SA 4.0 (cropped)
- Related lab (Nagashio Lab): “Graphen” AlexanderAlUS / CC BY-SA 3.0 (cropped)
- Related lab (Uchida-Toyoshima Lab): “Silicon wafer close view” Le hollandais volant / CC BY 4.0 (cropped)
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