, Volume 97, Issue 3, pp 743–765 | Cite as

Co-word based thematic analysis of renewable energy (1990–2010)

  • Luz M. Romo-Fernández
  • Vicente P. Guerrero-Bote
  • Félix Moya-Anegón


This article describes an analysis of keywords which was aimed at revealing publication patterns in the field of renewable energy, including the temporal evolution of its different research lines over the last two decades. To this end, we first retrieved the records of the sample, then we processed the keywords to resolve their obvious problems of synonymy and to limit the study to those most used. The final results showed a clear increase in scientific production related to alternative energies, and a structure corresponding to five major clusters which, at a finer level of resolution, were decomposed into 22. We analyzed the structure of the clusters and their temporal evolution, paying particular attention to uncovering the bursty periods of the different lines of research.


Bibliometrics Co-word analysis Renewable energy Clustering 




This work was financed by the Junta de Extremadura—Consejería de Educación Ciencia & Tecnología and the Fondo Social Europeo as part of predoctoral studentship PRE07051 and the research group grant GR10019, and by the Plan Nacional de Investigación Científica, Desarrollo e Innovación Tecnológica 2008-2011 and the Fondo Europeo de Desarrollo Regional (FEDER) as part of research projects TIN2008-06514-C02-01 and TIN2008-06514-C02-02.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2013

Authors and Affiliations

  • Luz M. Romo-Fernández
    • 1
  • Vicente P. Guerrero-Bote
    • 1
  • Félix Moya-Anegón
    • 2
  1. 1.Department of Information and Communication, SCImago GroupUniversity of ExtremaduraBadajozSpain
  2. 2.CSIC, CCHS, IPP, SCImago GroupMadridSpain

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