Research field · part of Physical Sciences
Energy
Study of energy in physical systems, its sources, technology, management, and impact on sustainability.
Also known as: energy studies, energy science and technology
1.9M
Works (OpenAlex)
25.9M
Citations (OpenAlex)
5
Subfields
Counts: OpenAlex snapshot, March 2026. They cover every work OpenAlex has classified in this field, not only papers in our index.
Most-cited papers in Energy
From our index (snapshot, October 2026): papers whose primary topic falls in this field, ranked by citation count. Counts that fail a plausibility check are left out.
A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films
Brian C. O’Regan, Michaël Grätzel
1991Nature28,284 citations
Human Domination of Earth's Ecosystems
Peter M. Vitousek, Harold A. Mooney, Jane Lubchenco, Jerry M. Melillo
1997Science8,834 citations
Titanium dioxide photocatalysis
Akira Fujishima, Tata N. Rao, Donald A. Tryk
2000Journal of Photochemistry and Photobiology C Photochemistry Reviews7,820 citations
TiO2 photocatalysis and related surface phenomena
A FUJISHIMA, Xintong Zhang, Donald A. Tryk
2008Surface Science Reports6,441 citations
Microalgae for biodiesel production and other applications: A review
Teresa M. Mata, António A. Martins, Nídia S. Caetano
2009Renewable and Sustainable Energy Reviews5,536 citations
Comparison of Photovoltaic Array Maximum Power Point Tracking Techniques
Trishan Esram, Patrick L. Chapman
2007IEEE Transactions on Energy Conversion5,254 citations
Biofuels from microalgae—A review of technologies for production, processing, and extractions of biofuels and co-products
Liam Brennan, Philip Owende
2009Renewable and Sustainable Energy Reviews4,812 citations
Activity benchmarks and requirements for Pt, Pt-alloy, and non-Pt oxygen reduction catalysts for PEMFCs
Hubert A. Gasteiger, Shyam S. Kocha, Bhaskar Sompalli, Frederick T. Wagner
2004Applied Catalysis B: Environmental4,776 citations