Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)In celebration of the 2015 International Year of Light, we highlight major breakthroughs in photonics for energy conversion and conservation. The section on energy conversion discusses the role of light in solar light harvesting for electrical and thermal power generation; chemical energy conversion and fuel generation; as well as photonic sensors for energy applications. The section on energy conservation focuses on solid-state lighting, flat-panel displays, and optical communications and interconnects. (C) The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.5Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)U.S. National Science Foundation [DMR-1309459, ECCS 1408051, DMR 1505122]U.S. Office of Naval ResearchEngineering and Physical Sciences Research Council of the UK [EP/K00042X, EP/L012294]European Research Council of the European Union [321305]Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP
