Following his PhD, Snaith did two years of postdoctoral research with Michael Grätzel at the École Polytechnique Fédérale de Lausanne (EPFL).

His recent discovery of extremely efficient thin-film solar cells manufactured from organic-inorganic metal halide perovskites has reset aspirations within the photovoltaics community.

His work has started a new field of research, attracting both academic and industrial following, propelled by the prospect of delivering a higher efficiency photovoltaic technology at a much lower cost than existing silicon PV.

[7]In 2012, Snaith was Institute of Physics Clifford Paterson Medal and Prize for "his important contributions to the field of excitonic solar cells".

[1] In 2015, Snaith was ranked number two on the list of The World's Most Influential Scientific Minds, a citation analysis identifying the scientists who have made the most significant impact within their respective field of study by the Intellectual Property (IP) and Science business of Thomson Reuters.

[16] In October 2017, he was awarded the Institute of Physics James Joule Medal and Prize for the discovery and development of organic-inorganic metal-halide perovskite solar cells.