Citation Rankings
Highly Cited Researchers
Europe Highly Cited Researchers CitationEngineering & Technology / Energy Engineering Rankings 2025
The Citation Rankings (Highly Cited Researchers) highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the Scientists Last 6 Years Citation Index, Universities Total Citations Rankings 2025, and Universities Last 6 Years Citations Rankings 2025.
* Total Citation Counts Rankings
Ranking Based On Selection :1
Solar energy conversion
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
497,563
167,493
0.337
* Total Citation Counts Rankings
Ranking Based On Selection :2
Statistics
Machine Learning
Renewable Energy
Building Physics
Particle Physics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
205,177
77,468
0.378
* Total Citation Counts Rankings
Ranking Based On Selection :3
solar energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
186,599
73,259
0.393
* Total Citation Counts Rankings
Ranking Based On Selection :4
solar energy
photochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
86,149
34,014
0.395
* Total Citation Counts Rankings
Ranking Based On Selection :5
Solar Cells & Solar Fuels
Artificial Photosynthesis
Water Splitting
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
76,609
36,463
0.476
* Total Citation Counts Rankings
Ranking Based On Selection :6
Hybrid solar cells
Perovskite solar cells
Perovskites
Tin perovskite
Solar energy conversion
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
56,842
39,199
0.690
* Total Citation Counts Rankings
Ranking Based On Selection :7
Solar Energy
Renewable Energy Systems
Solar Cooling
Desalination
Neural Networks
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
46,812
24,171
0.516
* Total Citation Counts Rankings
Ranking Based On Selection :8
Batteries
Energy Storage
Electrochemistry
Battery Characterization
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
44,428
18,223
0.410
* Total Citation Counts Rankings
Ranking Based On Selection :9
solar cells and modules
building integrated photovoltaics
storage
smart grid
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42,314
22,229
0.525
* Total Citation Counts Rankings
Ranking Based On Selection :10
Energy
Nanotechnology
Thermodynamics
Interfacial Phenomena and Surface Science
Biofluidics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
41,728
17,145
0.411
* Total Citation Counts Rankings
Ranking Based On Selection :11
100% Renewable Energy Systems
Smart Energy Systems Design and Modelling
Energy Planning and Policy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,290
22,259
0.567
* Total Citation Counts Rankings
Ranking Based On Selection :12
Solar change
space weather
climate
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,119
17,437
0.457
* Total Citation Counts Rankings
Ranking Based On Selection :13
Energy Storage
Supercapacitors
2D materials
Electrochemistry
Electrolytes
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
34,141
28,797
0.843
* Total Citation Counts Rankings
Ranking Based On Selection :14
Energy
resources
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
33,630
17,835
0.530
* Total Citation Counts Rankings
Ranking Based On Selection :15
Energy
hydrogen
fuel cells
electrolysis
systems analysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31,530
23,574
0.748
* Total Citation Counts Rankings
Ranking Based On Selection :16
energy systems
CCS
renewable energy
power generation
climate change mitigation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31,168
20,563
0.660
* Total Citation Counts Rankings
Ranking Based On Selection :17
Metabolism
Aging
Diabetes
Obesity
Mitochondria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,925
9,962
0.344
* Total Citation Counts Rankings
Ranking Based On Selection :18
Center for Bioenergy and Green Engineering incl. Renewable Energy Systems
Smart Energy Systems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,600
12,532
0.438
* Total Citation Counts Rankings
Ranking Based On Selection :19
Energy Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,723
12,256
0.459
* Total Citation Counts Rankings
Ranking Based On Selection :20
Energy efficiency
emission reduction
bio-based materials
energy analysis
LCA (Life Cycle Assessment)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,479
14,805
0.581
* Total Citation Counts Rankings
Ranking Based On Selection :21
Solar Cells
Organic Semiconductors
Photovoltaics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,462
7,119
0.280
* Total Citation Counts Rankings
Ranking Based On Selection :22
renewable energy
energy transition
solar energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,346
21,700
0.856
* Total Citation Counts Rankings
Ranking Based On Selection :23
Solar Cells
NMR
Organinc Synthesis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,196
7,314
0.290
* Total Citation Counts Rankings
Ranking Based On Selection :24
Advanced Energy Systems
Renewable Energy
Energy Transition
Multidisciplinarity
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,439
14,542
0.595
* Total Citation Counts Rankings
Ranking Based On Selection :25
energy
solar cells
nanomaterials
photochemistry
photo-induced charge transfer
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,793
6,018
0.276
* Total Citation Counts Rankings
Rankings
28
1
1
Ranking Based On Selection: 1
Michael Graetzel
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
497,563
167,493
0.337
* Total Citation Counts Rankings
Rankings
755
14
2
Ranking Based On Selection: 2
Roberto Castello
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
205,177
77,468
0.378
Statistics
Machine Learning
Renewable Energy
Building Physics
Particle Physics
* Total Citation Counts Rankings
Rankings
941
17
4
Ranking Based On Selection: 3
Nazeeruddin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
186,599
73,259
0.393
* Total Citation Counts Rankings
Rankings
4,100
334
31
Ranking Based On Selection: 4
James Robert Durrant
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
86,149
34,014
0.395
solar energy
photochemistry
* Total Citation Counts Rankings
Rankings
5,037
52
3
Ranking Based On Selection: 5
Licheng Sun
Royal Institute of Technology
Stockholm, Sweden
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
76,609
36,463
0.476
Solar Cells & Solar Fuels
Artificial Photosynthesis
Water Splitting
* Total Citation Counts Rankings
Rankings
8,132
328
1
Ranking Based On Selection: 6
Antonio Abate
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
56,842
39,199
0.690
Hybrid solar cells
Perovskite solar cells
Perovskites
Tin perovskite
Solar energy conversion
* Total Citation Counts Rankings
Rankings
11,069
6
1
Ranking Based On Selection: 7
Soteris Kalogirou
Cyprus University of Technology
Limassol, Cyprus
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
46,812
24,171
0.516
Solar Energy
Renewable Energy Systems
Solar Cooling
Desalination
Neural Networks
* Total Citation Counts Rankings
Rankings
12,054
219
51
Ranking Based On Selection: 8
Petr Novák
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
44,428
18,223
0.410
Batteries
Energy Storage
Electrochemistry
Battery Characterization
* Total Citation Counts Rankings
Rankings
13,048
234
32
Ranking Based On Selection: 9
Christophe Ballif
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42,314
22,229
0.525
solar cells and modules
building integrated photovoltaics
storage
smart grid
* Total Citation Counts Rankings
Rankings
13,357
244
55
Ranking Based On Selection: 10
Dimos Poulikakos
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
41,728
17,145
0.411
Energy
Nanotechnology
Thermodynamics
Interfacial Phenomena and Surface Science
Biofluidics
* Total Citation Counts Rankings
Rankings
14,705
120
10
Ranking Based On Selection: 11
Henrik Lund
Aalborg University
Aalborg, Denmark
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,290
22,259
0.567
100% Renewable Energy Systems
Smart Energy Systems Design and Modelling
Energy Planning and Policy
* Total Citation Counts Rankings
Rankings
15,425
1,344
9
Ranking Based On Selection: 12
Mike Lockwood
University of Reading
Reading, United Kingdom
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,119
17,437
0.457
Solar change
space weather
climate
* Total Citation Counts Rankings
Rankings
18,301
335
77
Ranking Based On Selection: 13
Maria Lukatskaya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
34,141
28,797
0.843
Energy Storage
Supercapacitors
2D materials
Electrochemistry
Electrolytes
* Total Citation Counts Rankings
Rankings
18,736
462
56
Ranking Based On Selection: 14
Ernst Worrell
Utrecht University
Utrecht, Netherlands
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
33,630
17,835
0.530
* Total Citation Counts Rankings
Rankings
20,750
927
7
Ranking Based On Selection: 15
Detlef Stolten
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31,530
23,574
0.748
Energy
hydrogen
fuel cells
electrolysis
systems analysis
* Total Citation Counts Rankings
Rankings
21,128
266
10
Ranking Based On Selection: 16
Jinyue Yan
Royal Institute of Technology
Stockholm, Sweden
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31,168
20,563
0.660
energy systems
CCS
renewable energy
power generation
climate change mitigation
* Total Citation Counts Rankings
Rankings
23,727
441
108
Ranking Based On Selection: 17
Michael Ristow
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,925
9,962
0.344
Metabolism
Aging
Diabetes
Obesity
Mitochondria
* Total Citation Counts Rankings
Rankings
24,156
197
16
Ranking Based On Selection: 18
Jens Bo Holm Nielsen
Aalborg University
Aalborg, Denmark
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,600
12,532
0.438
Center for Bioenergy and Green Engineering incl. Renewable Energy Systems
Smart Energy Systems
* Total Citation Counts Rankings
Rankings
26,701
1,165
17
Ranking Based On Selection: 19
George Tsatsaronis
Technische Universität Berlin
Berlin, Germany
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,723
12,256
0.459
* Total Citation Counts Rankings
Rankings
28,684
538
54
Ranking Based On Selection: 20
Martin K Patel
Université de Geneve
Geneva, Switzerland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,479
14,805
0.581
Energy efficiency
emission reduction
bio-based materials
energy analysis
LCA (Life Cycle Assessment)
* Total Citation Counts Rankings
Rankings
28,719
147
5
Ranking Based On Selection: 21
Markus Scharber|Markus C. Scharber
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,462
7,119
0.280
Solar Cells
Organic Semiconductors
Photovoltaics
* Total Citation Counts Rankings
Rankings
28,899
132
3
Ranking Based On Selection: 22
Christian Breyer
Lappeenranta University of Technology
Lappeenranta, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,346
21,700
0.856
renewable energy
energy transition
solar energy
* Total Citation Counts Rankings
Rankings
29,166
253
39
Ranking Based On Selection: 23
Mikkel Jørgensen
Technical University of Denmark
Kongens Lyngby, Denmark
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,196
7,314
0.290
Solar Cells
NMR
Organinc Synthesis
* Total Citation Counts Rankings
Rankings
30,545
139
16
Ranking Based On Selection: 24
Peter D Lund
Aalto University
Espoo, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,439
14,542
0.595
Advanced Energy Systems
Renewable Energy
Energy Transition
Multidisciplinarity
* Total Citation Counts Rankings
Rankings
35,926
678
3
Ranking Based On Selection: 25
Emilio Palomares
Institut Catalá d'Investigació Química
Tarragona, Spain
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,793
6,018
0.276
energy
solar cells
nanomaterials
photochemistry
photo-induced charge transfer