Citation Rankings
Highly Cited Researchers
World 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 cells
memory
semiconductor
organic electronics
organic photovoltaics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
155,215
57,320
0.369
* Total Citation Counts Rankings
Ranking Based On Selection :5
hollow structures
batteries
electrocatalysis
supercapacitors
photocatalysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
141,263
78,762
0.558
* Total Citation Counts Rankings
Ranking Based On Selection :6
Photovoltaics
Semiconductors
Solar Cells
Conversion Efficiency
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
124,860
47,061
0.377
* Total Citation Counts Rankings
Ranking Based On Selection :7
batteries
fuel cells
materials chemistry
synthesis
nanomaterials
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
120,662
69,858
0.579
* Total Citation Counts Rankings
Ranking Based On Selection :8
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 :9
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 :10
battery
nanomaterials
catalysts
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
73,134
37,800
0.517
* Total Citation Counts Rankings
Ranking Based On Selection :11
Electron Microscopy
Tomography
Renewable Energy
Complex Oxides
Ptychography
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
72,069
36,221
0.503
* Total Citation Counts Rankings
Ranking Based On Selection :12
energy storage materials
graphene 2D materials
photonics
hybrid perovskites
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
62,919
29,957
0.476
* Total Citation Counts Rankings
Ranking Based On Selection :13
Energy storage
Li-S batteries
Lithium metal anode
Carbon nanomaterials
Fluidized bed
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
59,973
47,189
0.787
* Total Citation Counts Rankings
Ranking Based On Selection :14
Energy Studies
Solar Thermal
Photovoltaics
Renewable Energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
55,724
36,183
0.649
* Total Citation Counts Rankings
Ranking Based On Selection :15
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 :16
Engine Combustion
bio-fuel
ragne extender
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
51,389
29,953
0.583
* Total Citation Counts Rankings
Ranking Based On Selection :17
solar energy conversion materials (potocatalysis
photoelectrochemical
solar cells)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
49,320
26,456
0.536
* Total Citation Counts Rankings
Ranking Based On Selection :18
Solar Energy Conversion and Storage
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
49,306
34,610
0.702
* Total Citation Counts Rankings
Ranking Based On Selection :19
Electrochemical Engineering
Fuel cells
Hydrogen
Electrocatalysis
Polymer Electrolytes
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
46,826
24,079
0.514
* Total Citation Counts Rankings
Ranking Based On Selection :20
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 :21
perovskite solar cells
perovskite LEDs
organic solar cells
organic electronics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
44,132
27,760
0.629
* Total Citation Counts Rankings
Ranking Based On Selection :22
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 :23
Renewable Energy
Power Electronics
Drives
Electrical Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42,485
26,787
0.631
* Total Citation Counts Rankings
Ranking Based On Selection :24
Renewable Energy
Energy Storage Systems
CAD and Design
Smart Materials
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
41,991
33,132
0.789
* Total Citation Counts Rankings
Ranking Based On Selection :25
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
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
751
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
918
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
1,278
565
8
Ranking Based On Selection: 4
Yang Yang (楊陽）
University of California Los Angeles
Los Angeles, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
155,215
57,320
0.369
solar cells
memory
semiconductor
organic electronics
organic photovoltaics
* Total Citation Counts Rankings
Rankings
1,528
7
2
Ranking Based On Selection: 5
Xiong Wen David Lou
Nanyang Technological University
Jurong West, Singapore
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
141,263
78,762
0.558
hollow structures
batteries
electrocatalysis
supercapacitors
photocatalysis
* Total Citation Counts Rankings
Rankings
1,937
55
8
Ranking Based On Selection: 6
Martin A Green
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
124,860
47,061
0.377
Photovoltaics
Semiconductors
Solar Cells
Conversion Efficiency
* Total Citation Counts Rankings
Rankings
2,051
955
8
Ranking Based On Selection: 7
Arumugam Manthiram
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
120,662
69,858
0.579
batteries
fuel cells
materials chemistry
synthesis
nanomaterials
* Total Citation Counts Rankings
Rankings
4,064
331
31
Ranking Based On Selection: 8
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: 9
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
5,247
57
3
Ranking Based On Selection: 10
Jaephil Cho
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
73,134
37,800
0.517
battery
nanomaterials
catalysts
* Total Citation Counts Rankings
Rankings
5,351
2,545
23
Ranking Based On Selection: 11
David A Muller
Cornell University
Ithaca, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
72,069
36,221
0.503
Electron Microscopy
Tomography
Renewable Energy
Complex Oxides
Ptychography
* Total Citation Counts Rankings
Rankings
6,655
30
10
Ranking Based On Selection: 12
Shen Ze Xiang
Nanyang Technological University
Jurong West, Singapore
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
62,919
29,957
0.476
energy storage materials
graphene 2D materials
photonics
hybrid perovskites
* Total Citation Counts Rankings
Rankings
7,204
194
2
Ranking Based On Selection: 13
Jia-Qi Huang 黄佳琦
Beijing Institute of Technology
Beijing, China
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
59,973
47,189
0.787
Energy storage
Li-S batteries
Lithium metal anode
Carbon nanomaterials
Fluidized bed
* Total Citation Counts Rankings
Rankings
8,097
8
1
Ranking Based On Selection: 14
Kamaruzzaman Sopian
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
55,724
36,183
0.649
Energy Studies
Solar Thermal
Photovoltaics
Renewable Energy
* Total Citation Counts Rankings
Rankings
8,202
331
1
Ranking Based On Selection: 15
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
9,235
255
2
Ranking Based On Selection: 16
Liguang Liu
Tongji University
Shanghai, China
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
51,389
29,953
0.583
Engine Combustion
bio-fuel
ragne extender
* Total Citation Counts Rankings
Rankings
9,880
285
4
Ranking Based On Selection: 17
Gang Liu (刘岗)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
49,320
26,456
0.536
solar energy conversion materials (potocatalysis
photoelectrochemical
solar cells)
* Total Citation Counts Rankings
Rankings
9,883
4,730
2
Ranking Based On Selection: 18
Kai Zhu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
49,306
34,610
0.702
Solar Energy Conversion and Storage
* Total Citation Counts Rankings
Rankings
10,694
5,107
8
Ranking Based On Selection: 19
Yushan Yan
University of Delaware
Newark, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
46,826
24,079
0.514
Electrochemical Engineering
Fuel cells
Hydrogen
Electrocatalysis
Polymer Electrolytes
* Total Citation Counts Rankings
Rankings
11,148
6
1
Ranking Based On Selection: 20
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
11,733
94
18
Ranking Based On Selection: 21
Hin-Lap Yip 葉軒立）
City University of Hong Kong
Coimbatore, Hong Kong
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
44,132
27,760
0.629
perovskite solar cells
perovskite LEDs
organic solar cells
organic electronics
* Total Citation Counts Rankings
Rankings
11,914
216
51
Ranking Based On Selection: 22
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
12,503
16
2
Ranking Based On Selection: 23
Nasrudin Abd Rahim
University of Malaya
Kuala Lumpur, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42,485
26,787
0.631
Renewable Energy
Power Electronics
Drives
Electrical Engineering
* Total Citation Counts Rankings
Rankings
12,724
8
4
Ranking Based On Selection: 24
Abdul-Ghani Olabi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
41,991
33,132
0.789
Renewable Energy
Energy Storage Systems
CAD and Design
Smart Materials
* Total Citation Counts Rankings
Rankings
13,122
236
33
Ranking Based On Selection: 25
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