Functional inorganic-organic hybrid materials
Multifunctional crystalline hybrid semiconductors
Hybrid perovskite solar cells

1996 ~ 1997 Post-doc, Cornell Univerrsity
1997 ~ 2013 Principle Investigator, Korea Research Institute of Chemical Technology
2013 ~ 2015 Research Fellow, Korea Research Institute of Chemical Technology (dual apointment)
2013 ~ 2015 Full Professor, Sungkyunkwan University (dual apointment)
2015 ~ Present Distinguished Professor, Ulsan National Institute of Science and Technology
2018 ~ Present Research Leader Program, director

2014 Science and Technology Medal from Korean Government
2017 Korea Scientist award by Korean government
2019 Kyung-Ahm Prize by the Kyung-Ahm Education & Cultural Foundation