Bibliometric Analysis of the Energy Efficiency Research

countries, and it is also at the forefront of the debate on energy
sustainability. To further understand the research frontiers in the
energy efficiency field, this paper utilizes a bibliometric analysis
with the help of visualization tools: CiteSpace and VOSviewer. The
relevant literature during 2010-2020 is collected with the retrieval
formulas from the Web of Science Core Collection. Firstly, this
paper analyzes the annual indicators, research areas, productive
institutions, authors, and journals of publications to comprehend the
temporal and spatial distribution characteristics of the energy
efficiency literature. Meanwhile, this paper identifies the productive
institutions and authors and the influential journals. Then, we
construct the collaboration networks among countries/regions/insti
tutions, references, and authors to know the collaborative
relationships. By analyzing the keywords from highly cited papers
with clustering, timeline view, and time zone view, the trend of
changes is grasped over time in the energy efficiency literature.
Finally, conclusions and some directions for future research are put
forward in terms of the bibliometric analysis findings, which may
make some references for researchers in the energy field.