Research Interests
Semiconductors and Optoelectronics
We have developed highly crystalline thin film and fabrication process for stable semiconduting device applications such as photovoltaics and light-emitting diodes. The operation stability and reliability plays an essential role for commercialization. We utilized the root cause analysis and structure-property relationship to identify problems and improved device performance.
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Renewable Energy Generation and Efficienct Light Coversion
References: Science 347, 522-525 (2015); Nature (2016); Science 360 67-70 (2018); Nat. Photon., 15, 843-849 (2021); Nano Lett.,23, 2, 429-436 (2023).
Radiation Detection
Eco-Friendly Device Design
We developed a recyclable perovskite–graphene heterostructure that demonstrates ultrahigh X-ray detection sensitivities over 10^8 μC/Gyair·cm^2 for medical imaging applications. The high mobility of the graphene pixel is preserved to over 1200 cm^2/V·s after perovskite deposition and enables large conversion efficiency for ultrahigh sensitivity.
References: ACS Energy Lett., 8, 7, 3161-3170 (2023); Adv. Mater., 34,2106498 (2022); Sci. Adv., 6, eaay0815 (2020).
Carbon Capture and Utilizations
Sustainability Materials Development
We have developed the metal-organic frameworks for diract air capture of carbon dioxide with melcular level precision structure and pore size control . These materials not only have single step-shape adsorption but also have fast adsorption and desportion kineticsis with minimum temperature or pressure sweep.
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References: J. Am. Chem. Soc., 145, 31,17151–17163 (2023); J. Am. Chem. Soc., 146, 9, 6072–6083 (2024)