Citation Rankings
Highly Cited Researchers
Europe Highly Cited Researchers CitationEngineering & Technology / Energy Engineering Rankings 2025
Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: 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
491,458
161,949
0.330
* 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
201,640
74,666
0.370
* Total Citation Counts Rankings
Ranking Based On Selection :3
solar energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
184,834
71,567
0.387
* Total Citation Counts Rankings
Ranking Based On Selection :4
solar energy
photochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
84,794
32,692
0.386
* 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
75,049
34,927
0.465
* 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
55,264
37,653
0.681
* 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
45,595
23,057
0.506
* 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
43,720
17,540
0.401
* 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
41,216
21,199
0.514
* 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
41,047
16,514
0.402
* 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
38,004
21,087
0.555
* Total Citation Counts Rankings
Ranking Based On Selection :12
Solar change
space weather
climate
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,188
16,547
0.445
* 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
33,351
27,907
0.837
* Total Citation Counts Rankings
Ranking Based On Selection :14
Energy
resources
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
32,495
16,778
0.516
* 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
29,896
21,994
0.736
* 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
29,854
19,292
0.646
* Total Citation Counts Rankings
Ranking Based On Selection :17
Metabolism
Aging
Diabetes
Obesity
Mitochondria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,488
9,559
0.336
* 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
27,775
11,885
0.428
* Total Citation Counts Rankings
Ranking Based On Selection :19
Energy Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,144
11,748
0.449
* Total Citation Counts Rankings
Ranking Based On Selection :20
Solar Cells
Organic Semiconductors
Photovoltaics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,106
6,780
0.270
* Total Citation Counts Rankings
Ranking Based On Selection :21
Solar Cells
NMR
Organinc Synthesis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,986
7,109
0.285
* Total Citation Counts Rankings
Ranking Based On Selection :22
Energy efficiency
emission reduction
bio-based materials
energy analysis
LCA (Life Cycle Assessment)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,661
14,044
0.569
* Total Citation Counts Rankings
Ranking Based On Selection :23
renewable energy
energy transition
solar energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,746
20,119
0.847
* 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
23,613
13,751
0.582
* 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
21,527
5,735
0.266
* Total Citation Counts Rankings
Rankings
26
1
1
Ranking Based On Selection: 1
Michael Graetzel
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
491,458
161,949
0.330
* Total Citation Counts Rankings
Rankings
750
15
2
Ranking Based On Selection: 2
Roberto Castello
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
201,640
74,666
0.370
Statistics
Machine Learning
Renewable Energy
Building Physics
Particle Physics
* Total Citation Counts Rankings
Rankings
917
17
4
Ranking Based On Selection: 3
Nazeeruddin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
184,834
71,567
0.387
* Total Citation Counts Rankings
Rankings
4,063
331
31
Ranking Based On Selection: 4
James Robert Durrant
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
84,794
32,692
0.386
solar energy
photochemistry
* Total Citation Counts Rankings
Rankings
5,014
53
3
Ranking Based On Selection: 5
Licheng Sun
Royal Institute of Technology
Stockholm, Sweden
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
75,049
34,927
0.465
Solar Cells & Solar Fuels
Artificial Photosynthesis
Water Splitting
* Total Citation Counts Rankings
Rankings
8,202
331
1
Ranking Based On Selection: 6
Antonio Abate
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
55,264
37,653
0.681
Hybrid solar cells
Perovskite solar cells
Perovskites
Tin perovskite
Solar energy conversion
* Total Citation Counts Rankings
Rankings
11,148
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
45,595
23,057
0.506
Solar Energy
Renewable Energy Systems
Solar Cooling
Desalination
Neural Networks
* Total Citation Counts Rankings
Rankings
11,914
216
51
Ranking Based On Selection: 8
Petr Novák
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
43,720
17,540
0.401
Batteries
Energy Storage
Electrochemistry
Battery Characterization
* Total Citation Counts Rankings
Rankings
13,121
236
33
Ranking Based On Selection: 9
Christophe Ballif
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
41,216
21,199
0.514
solar cells and modules
building integrated photovoltaics
storage
smart grid
* Total Citation Counts Rankings
Rankings
13,213
242
55
Ranking Based On Selection: 10
Dimos Poulikakos
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
41,047
16,514
0.402
Energy
Nanotechnology
Thermodynamics
Interfacial Phenomena and Surface Science
Biofluidics
* Total Citation Counts Rankings
Rankings
14,975
118
10
Ranking Based On Selection: 11
Henrik Lund
Aalborg University
Aalborg, Denmark
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,004
21,087
0.555
100% Renewable Energy Systems
Smart Energy Systems Design and Modelling
Energy Planning and Policy
* Total Citation Counts Rankings
Rankings
15,458
1,348
9
Ranking Based On Selection: 12
Mike Lockwood
University of Reading
Reading, United Kingdom
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,188
16,547
0.445
Solar change
space weather
climate
* Total Citation Counts Rankings
Rankings
18,331
336
77
Ranking Based On Selection: 13
Maria Lukatskaya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
33,351
27,907
0.837
Energy Storage
Supercapacitors
2D materials
Electrochemistry
Electrolytes
* Total Citation Counts Rankings
Rankings
19,052
474
59
Ranking Based On Selection: 14
Ernst Worrell
Utrecht University
Utrecht, Netherlands
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
32,495
16,778
0.516
* Total Citation Counts Rankings
Rankings
21,719
971
7
Ranking Based On Selection: 15
Detlef Stolten
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,896
21,994
0.736
Energy
hydrogen
fuel cells
electrolysis
systems analysis
* Total Citation Counts Rankings
Rankings
21,771
270
10
Ranking Based On Selection: 16
Jinyue Yan
Royal Institute of Technology
Stockholm, Sweden
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,854
19,292
0.646
energy systems
CCS
renewable energy
power generation
climate change mitigation
* Total Citation Counts Rankings
Rankings
23,472
437
107
Ranking Based On Selection: 17
Michael Ristow
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,488
9,559
0.336
Metabolism
Aging
Diabetes
Obesity
Mitochondria
* Total Citation Counts Rankings
Rankings
24,429
196
16
Ranking Based On Selection: 18
Jens Bo Holm Nielsen
Aalborg University
Aalborg, Denmark
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
27,775
11,885
0.428
Center for Bioenergy and Green Engineering incl. Renewable Energy Systems
Smart Energy Systems
* Total Citation Counts Rankings
Rankings
26,719
1,159
17
Ranking Based On Selection: 19
George Tsatsaronis
Technische Universität Berlin
Berlin, Germany
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,144
11,748
0.449
* Total Citation Counts Rankings
Rankings
28,386
144
5
Ranking Based On Selection: 20
Markus Scharber|Markus C. Scharber
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,106
6,780
0.270
Solar Cells
Organic Semiconductors
Photovoltaics
* Total Citation Counts Rankings
Rankings
28,603
244
38
Ranking Based On Selection: 21
Mikkel Jørgensen
Technical University of Denmark
Kongens Lyngby, Denmark
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,986
7,109
0.285
Solar Cells
NMR
Organinc Synthesis
* Total Citation Counts Rankings
Rankings
29,160
547
55
Ranking Based On Selection: 22
Martin K Patel
Université de Geneve
Geneva, Switzerland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,661
14,044
0.569
Energy efficiency
emission reduction
bio-based materials
energy analysis
LCA (Life Cycle Assessment)
* Total Citation Counts Rankings
Rankings
30,841
142
3
Ranking Based On Selection: 23
Christian Breyer
Lappeenranta University of Technology
Lappeenranta, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,746
20,119
0.847
renewable energy
energy transition
solar energy
* Total Citation Counts Rankings
Rankings
31,091
144
17
Ranking Based On Selection: 24
Peter D Lund
Aalto University
Espoo, Finland
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,613
13,751
0.582
Advanced Energy Systems
Renewable Energy
Energy Transition
Multidisciplinarity
* Total Citation Counts Rankings
Rankings
35,422
670
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
21,527
5,735
0.266
energy
solar cells
nanomaterials
photochemistry
photo-induced charge transfer