World Scientist and University Rankings 2025
World Engineering & Technology 6.038 Scientists Subject Rankings - 2025
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 197 sub-branches at global, national, and regional levels. These analyses are based on indicators such as the H-index, i10-index, and citation count, including their values from the last 6 years. As of Jan 31, 2025, the rankings are determined according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in their Beta phase. This is due to the exclusion of (873.690) scientists categorized under ‘Others’, whose profiles have yet to be determined, edited, or classified. As updates are made to these fields, the rankings will be adjusted accordingly. Note: Please keep this in mind while reviewing the rankings. For further details, explore our [University Subject Rankings].
* Total H IndexRankings
Ranking Based On Selection: 1
Solar energy conversion
Metrics
H-Index
i10 Index
Citation Counts
311
1,549
502,880
* Total H IndexRankings
Ranking Based On Selection: 2
hollow structures
batteries
electrocatalysis
supercapacitors
photocatalysis
Metrics
H-Index
i10 Index
Citation Counts
227
397
145,955
* Total H IndexRankings
Ranking Based On Selection: 3
Statistics
Machine Learning
Renewable Energy
Building Physics
Particle Physics
Metrics
H-Index
i10 Index
Citation Counts
223
719
208,476
* Total H IndexRankings
Ranking Based On Selection: 4
solar energy
Metrics
H-Index
i10 Index
Citation Counts
194
856
190,419
* Total H IndexRankings
Ranking Based On Selection: 5
solar cells
memory
semiconductor
organic electronics
organic photovoltaics
Metrics
H-Index
i10 Index
Citation Counts
190
511
159,422
* Total H IndexRankings
Ranking Based On Selection: 6
batteries
fuel cells
materials chemistry
synthesis
nanomaterials
Metrics
H-Index
i10 Index
Citation Counts
173
933
126,793
* Total H IndexRankings
Ranking Based On Selection: 7
solar energy
photochemistry
Metrics
H-Index
i10 Index
Citation Counts
161
518
87,330
* Total H IndexRankings
Ranking Based On Selection: 8
Photovoltaics
Semiconductors
Solar Cells
Conversion Efficiency
Metrics
H-Index
i10 Index
Citation Counts
153
779
128,550
* Total H IndexRankings
Ranking Based On Selection: 9
batteries
Metrics
H-Index
i10 Index
Citation Counts
146
416
75,591
* Total H IndexRankings
Ranking Based On Selection: 10
Solar Cells & Solar Fuels
Artificial Photosynthesis
Water Splitting
Metrics
H-Index
i10 Index
Citation Counts
137
727
77,798
Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast!
* Total H IndexRankings
Ranking Based On Selection: 11
Energy storage
Li-S batteries
Lithium metal anode
Carbon nanomaterials
Fluidized bed
Metrics
H-Index
i10 Index
Citation Counts
129
367
64,625
* Total H IndexRankings
Ranking Based On Selection: 12
Electron Microscopy
Tomography
Renewable Energy
Complex Oxides
Ptychography
Metrics
H-Index
i10 Index
Citation Counts
126
413
75,336
* Total H IndexRankings
Ranking Based On Selection: 13
energy storage materials
graphene 2D materials
photonics
hybrid perovskites
Metrics
H-Index
i10 Index
Citation Counts
126
436
64,982
* Total H IndexRankings
Ranking Based On Selection: 14
Energy Studies
Solar Thermal
Photovoltaics
Renewable Energy
Metrics
H-Index
i10 Index
Citation Counts
121
736
59,282
* Total H IndexRankings
Ranking Based On Selection: 15
Solar Energy Conversion and Storage
Metrics
H-Index
i10 Index
Citation Counts
118
238
52,453
* Total H IndexRankings
Ranking Based On Selection: 16
Renewable Energy
Energy Storage Systems
CAD and Design
Smart Materials
Metrics
H-Index
i10 Index
Citation Counts
117
469
47,452
* Total H IndexRankings
Ranking Based On Selection: 17
Electrochemical Engineering
Fuel cells
Hydrogen
Electrocatalysis
Polymer Electrolytes
Metrics
H-Index
i10 Index
Citation Counts
117
333
49,150
* Total H IndexRankings
Ranking Based On Selection: 18
Energy storage
Batteries
E-waste/Batteries recycling
Sustainability
Circular economy
Metrics
H-Index
i10 Index
Citation Counts
113
385
41,870
* Total H IndexRankings
Ranking Based On Selection: 19
solar energy conversion materials (potocatalysis
photoelectrochemical
solar cells)
Metrics
H-Index
i10 Index
Citation Counts
110
531
61,717
* Total H IndexRankings
Ranking Based On Selection: 20
Energy
Nanotechnology
Thermodynamics
Interfacial Phenomena and Surface Science
Biofluidics
Metrics
H-Index
i10 Index
Citation Counts
109
432
42,314
* Total H IndexRankings
Ranking Based On Selection: 21
renewable energy
sustainability assessment
techno-economic
Metrics
H-Index
i10 Index
Citation Counts
108
634
45,797
* Total H IndexRankings
Ranking Based On Selection: 22
perovskite solar cells
perovskite LEDs
organic solar cells
organic electronics
Metrics
H-Index
i10 Index
Citation Counts
108
276
46,417
* Total H IndexRankings
Ranking Based On Selection: 23
solar cells and modules
building integrated photovoltaics
storage
smart grid
Metrics
H-Index
i10 Index
Citation Counts
108
460
43,144
* Total H IndexRankings
Ranking Based On Selection: 24
Renewable Energy
Power Electronics
Drives
Electrical Engineering
Metrics
H-Index
i10 Index
Citation Counts
107
472
44,935
* Total H IndexRankings
Ranking Based On Selection: 25
Engine Combustion
bio-fuel
ragne extender
Metrics
H-Index
i10 Index
Citation Counts
106
845
54,797
Michael Graetzel
Metrics
H-Index
i10-Index
Citation Counts
311
1,549
502,880
Xiong Wen David Lou
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
227
397
145,955
hollow structures
batteries
electrocatalysis
supercapacitors
photocatalysis
Roberto Castello
Metrics
H-Index
i10-Index
Citation Counts
223
719
208,476
Statistics
Machine Learning
Renewable Energy
Building Physics
Particle Physics
Nazeeruddin
Metrics
H-Index
i10-Index
Citation Counts
194
856
190,419
Yang Yang (楊陽）
University of California Los Angeles
Los Angeles, United States
Metrics
H-Index
i10-Index
Citation Counts
190
511
159,422
solar cells
memory
semiconductor
organic electronics
organic photovoltaics
Arumugam Manthiram
Metrics
H-Index
i10-Index
Citation Counts
173
933
126,793
batteries
fuel cells
materials chemistry
synthesis
nanomaterials
James Robert Durrant
Metrics
H-Index
i10-Index
Citation Counts
161
518
87,330
solar energy
photochemistry
Martin A Green
Metrics
H-Index
i10-Index
Citation Counts
153
779
128,550
Photovoltaics
Semiconductors
Solar Cells
Conversion Efficiency
Jaephil Cho
Metrics
H-Index
i10-Index
Citation Counts
146
416
75,591
Licheng Sun
Royal Institute of Technology
Stockholm, Sweden
Metrics
H-Index
i10-Index
Citation Counts
137
727
77,798
Solar Cells & Solar Fuels
Artificial Photosynthesis
Water Splitting
Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast!
Jia-Qi Huang 黄佳琦
Beijing Institute of Technology
Beijing, China
Metrics
H-Index
i10-Index
Citation Counts
129
367
64,625
Energy storage
Li-S batteries
Lithium metal anode
Carbon nanomaterials
Fluidized bed
David A Muller
Cornell University
Ithaca, United States
Metrics
H-Index
i10-Index
Citation Counts
126
413
75,336
Electron Microscopy
Tomography
Renewable Energy
Complex Oxides
Ptychography
Shen Ze Xiang
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
126
436
64,982
energy storage materials
graphene 2D materials
photonics
hybrid perovskites
Kamaruzzaman Sopian
Metrics
H-Index
i10-Index
Citation Counts
121
736
59,282
Energy Studies
Solar Thermal
Photovoltaics
Renewable Energy
Kai Zhu
Metrics
H-Index
i10-Index
Citation Counts
118
238
52,453
Solar Energy Conversion and Storage
Abdul-Ghani Olabi
Metrics
H-Index
i10-Index
Citation Counts
117
469
47,452
Renewable Energy
Energy Storage Systems
CAD and Design
Smart Materials
Yushan Yan
University of Delaware
Newark, United States
Metrics
H-Index
i10-Index
Citation Counts
117
333
49,150
Electrochemical Engineering
Fuel cells
Hydrogen
Electrocatalysis
Polymer Electrolytes
Madhavi Srinivasan
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
113
385
41,870
Energy storage
Batteries
E-waste/Batteries recycling
Sustainability
Circular economy
Gang Liu (刘岗)
Metrics
H-Index
i10-Index
Citation Counts
110
531
61,717
solar energy conversion materials (potocatalysis
photoelectrochemical
solar cells)
Dimos Poulikakos
Metrics
H-Index
i10-Index
Citation Counts
109
432
42,314
Energy
Nanotechnology
Thermodynamics
Interfacial Phenomena and Surface Science
Biofluidics
Liu Gang
Central South University
Changsha, China
Metrics
H-Index
i10-Index
Citation Counts
108
634
45,797
renewable energy
sustainability assessment
techno-economic
Hin-Lap Yip 葉軒立）
City University of Hong Kong
Kowloon, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
108
276
46,417
perovskite solar cells
perovskite LEDs
organic solar cells
organic electronics
Christophe Ballif
Metrics
H-Index
i10-Index
Citation Counts
108
460
43,144
solar cells and modules
building integrated photovoltaics
storage
smart grid
Nasrudin Abd Rahim
University of Malaya
Kuala Lumpur, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
107
472
44,935
Renewable Energy
Power Electronics
Drives
Electrical Engineering
Liguang Liu
Tongji University
Shanghai, China
Metrics
H-Index
i10-Index
Citation Counts
106
845
54,797
Engine Combustion
bio-fuel
ragne extender