This project is developed in the European Union due to photovoltaics is one of the main technologies necessary to achieve the targets of EU Energy Roadmap 2050. For me, it is interesting to know the state of the art of this material as a prospect for a postdoctoral stay in 2019-2020.
This topic is highly related to solar cell development and innovation.
One key feature is the development of thin film photovoltaics using flexible substrates
STARCELL aims to substitute two critical raw materials (In and Ga) used in conventional thin film photovoltaic (PV) technologies, via the introduction of sustainable kesterite (Cu2ZnSn(S,Se)4 – CZTSSe) semiconductors. (Project STARCELL Objective)
 S. Giraldo, E. Saucedo, M. Neuschitzer, F. Oliva, M. Placidi, X. Alcobé, V. Izquierdo-Roca, S. Kim, H. Tampo, H. Shibata, A. Pérez-Rodríguez, P. Pistor, How small amounts of Ge modify the formation pathways and crystallization of kesterites, Energy Environ. Sci. 11 (2018) 582–593. doi:10.1039/c7ee02318a. (Link)(Cited by 22)
 S.G. Haass, C. Andres, R. Figi, C. Schreiner, M. Bürki, Y.E. Romanyuk, A.N. Tiwari, Complex Interplay between Absorber Composition and Alkali Doping in High-Efficiency Kesterite Solar Cells, Adv. Energy Mater. 8 (2018) 1–9. doi:10.1002/aenm.201701760. (Link) (Cited by 11)
 C.J. Hages, A. Redinger, S. Levcenko, H. Hempel, M.J. Koeper, R. Agrawal, D. Greiner, C.A. Kaufmann, T. Unold, Identifying the Real Minority Carrier Lifetime in Nonideal Semiconductors: A Case Study of Kesterite Materials, Adv. Energy Mater. 7 (2017) 1–10. doi:10.1002/aenm.201700167. (Link) (Cited by )
 J. Márquez, H. Stange, C.J. Hages, N. Schaefer, S. Levcenko, S. Giraldo, E. Saucedo, K. Schwarzburg, D. Abou-Ras, A. Redinger, M. Klaus, C. Genzel, T. Unold, R. Mainz, Chemistry and Dynamics of Ge in Kesterite: Toward Band-Gap-Graded Absorbers, Chem. Mater. 29 (2017) 9399–9406. doi:10.1021/acs.chemmater.7b03416. (Link)