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Shen Lab
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The lab investigates the fundamental physics of quantum dot solar cells.
AboutAbout the lab
Uncovering the physics of solar cells through quantum dots.
To clarify the physical foundations that raise the photoelectric conversion efficiency of quantum dot solar cells, the Shen Lab studies metal oxide substrates and semiconductor quantum dots.
In a solar cell, quantum dots absorb light and generate carriers.
The metal oxide electrode acts as an n-type semiconductor and smoothly transports the electrons that are generated.
The lab also aims to use transient absorption spectroscopy to reveal how charges separate and recombine inside a solar cell under illumination.
Key terms
- Quantum dot
- A tiny particle made of semiconductor material, with properties different from those of a bulk semiconductor.
- Carrier
- A particle that carries electric charge in a semiconductor. Carriers are generated when light shines on the material.
- Transient absorption spectroscopy
- A type of laser spectroscopy. It is used to study how charges separate and recombine after light is applied.
ResearchResearch themes
To clarify the physical foundations that lead to higher photoelectric conversion efficiency in quantum dot solar cells, the lab studies metal oxide substrates and semiconductor quantum dots. It uses a variety of measurement instruments to examine the fundamental properties of solar cells from multiple angles.
*Illustrative imageThe role of metal oxide electrodes
A metal oxide electrode acts as an n-type semiconductor and smoothly transports electrons generated by sensitizers such as quantum dots. The properties of a solar cell differ greatly depending on the structure and crystal type of the electrode.
*Illustrative imageProperties of quantum dots
In a solar cell, quantum dots absorb light and generate carriers. Because their properties differ from those of bulk semiconductors, they are expected to find applications in next-generation solar cells.
*Illustrative imageQuantum dot solar cells
These are devices that convert light into electricity by combining metal oxide electrodes with quantum dots. Their photoelectric conversion efficiency is still low at present, but they are considered to have the potential to help solve energy problems around the world.
*Illustrative imageDynamics of photoexcited carriers
Using transient absorption spectroscopy, a type of laser spectroscopy, the lab reveals how photoexcited carriers undergo charge separation and recombination inside a solar cell under illumination.
MembersFaculty
The Shen Lab consists of Professors, a Professor Emeritus, postdoctoral researchers, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorShen Shen
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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: “Sargent Group quantum dot solar cell” Lukasz Brzozowski / CC BY-SA 3.0 (cropped)
- The role of metal oxide electrodes: “Metal Oxide TFT Cross Section” NoAppliedVoltage / CC BY-SA 4.0 (cropped)
- Properties of quantum dots: “Lab Mol Colloidal quantum dots 01” Lab mol (Ilia Litvinov) / CC BY 4.0 (cropped)
- Quantum dot solar cells: “Hexagon solar cells” Wikideas1 / CC0 (cropped)
- Dynamics of photoexcited carriers: “Laser lab ( )” Maximilian Paradiz from Amsterdam, Netherlands / CC BY 2.0 (cropped)
- Related lab (宮下 直也 研究室): “Molecular-beam epitaxy system at LAAS 0506” Guillaume Paumier (user:guillom) / CC BY-SA 3.0 (cropped)
- Related lab (山口 浩一
研究室): “U.S. Department of Energy - Science - )” U.S. Department of Energy from United States / Public domain (cropped) - Related lab (塚本 貴広 研究室): “2N140 PNP Germanium Alloy Junction Transistor closeup” John Maushammer / CC BY 4.0 (cropped)
- Related lab (武者 満 研究室): “Baffled LIGO Scientists” Nkij / CC BY 4.0 (cropped)
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