His research has been focused on crystal growth, optoelectronic devices, transport and recombination properties, photocatalysis, electrical characterization of photovoltaic, electrochromic, and water splitting systems, making both experimental and theoretical work. Recent research activity is focused on new concepts for photovoltaic conversion and light emission (LEDs and light amplifiers) based on nanoscaled devices and semiconductor materials following two mean lines: semiconductor quantum dots and lead halide perovskites, been this last line probably the current hottest topic in the development of new optoelectronic devices. He has publish more than 200 papers. He is included in the 2016, 2017, 2018, 2019 and 2020 list of Highly Cited Researchers of the Web of Science, list that just includes the 3000 highly cited researchers, in last 11 years, around the whole world in all the Science categories.