University, Subject, Country, Region, World
World 6.007 Scientists Subject Rankings - 2025
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 211 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 Apr 17, 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 (1.120.277) 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
1,557
505,673
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* Total H IndexRankings
Ranking Based On Selection: 2
hollow structures
batteries
electrocatalysis
supercapacitors
photocatalysi
Metrics
H-Index
i10 Index
Citation Counts
229
402
148,851
* Total H IndexRankings
Ranking Based On Selection: 3
Statistics
Machine Learning
Renewable Energy
Building Physics
Particle Physic
Metrics
H-Index
i10 Index
Citation Counts
224
714
209,734
* Total H IndexRankings
Ranking Based On Selection: 4
solar energy
Metrics
H-Index
i10 Index
Citation Counts
196
866
191,401
* Total H IndexRankings
Ranking Based On Selection: 5
solar cells
memory
semiconductor
organic electronics
organic photovoltaics
Metrics
H-Index
i10 Index
Citation Counts
191
511
159,871
* Total H IndexRankings
Ranking Based On Selection: 6
batteries
fuel cells
materials chemistry
synthesis
nanomaterials
Metrics
H-Index
i10 Index
Citation Counts
174
936
128,330
* Total H IndexRankings
Ranking Based On Selection: 7
solar energy
photochemistry
Metrics
H-Index
i10 Index
Citation Counts
162
521
88,152
* Total H IndexRankings
Ranking Based On Selection: 8
Photovoltaics
Semiconductors
Solar Cells
Conversion Efficienc
Metrics
H-Index
i10 Index
Citation Counts
154
785
130,500
* Total H IndexRankings
Ranking Based On Selection: 9
batteries
Metrics
H-Index
i10 Index
Citation Counts
146
419
76,430
* Total H IndexRankings
Ranking Based On Selection: 10
Solar Cells & Solar Fuels
Artificial Photosynthesis
Water Splittin
Metrics
H-Index
i10 Index
Citation Counts
139
746
79,624
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* 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
131
373
65,968
* Total H IndexRankings
Ranking Based On Selection: 12
Electron Microscopy
Tomography
Renewable Energy
Complex Oxides
Ptychograph
Metrics
H-Index
i10 Index
Citation Counts
128
422
77,733
* Total H IndexRankings
Ranking Based On Selection: 13
energy storage materials
graphene 2D materials
photonics
hybrid perovskite
Metrics
H-Index
i10 Index
Citation Counts
127
445
66,260
* Total H IndexRankings
Ranking Based On Selection: 14
Energy Engineering
Solar Thermal
Photovoltaics
Renewable Energ
Metrics
H-Index
i10 Index
Citation Counts
123
777
61,461
* Total H IndexRankings
Ranking Based On Selection: 15
Renewable Energy
Energy Storage Systems
CAD and Design
Smart Materials
Metrics
H-Index
i10 Index
Citation Counts
120
475
49,156
* Total H IndexRankings
Ranking Based On Selection: 16
Solar Energy Conversion and Storage
Metrics
H-Index
i10 Index
Citation Counts
118
239
53,398
* Total H IndexRankings
Ranking Based On Selection: 17
Electrochemical Engineering
Fuel cells
Hydrogen
Electrocatalysis
Polymer Electrolytes
Metrics
H-Index
i10 Index
Citation Counts
117
334
49,764
* Total H IndexRankings
Ranking Based On Selection: 18
Energy storage
Batteries
E-waste/Batteries recycling
Sustainability
Circular econom
Metrics
H-Index
i10 Index
Citation Counts
115
394
43,342
* Total H IndexRankings
Ranking Based On Selection: 19
solar energy conversion materials (potocatalysis
photoelectrochemical
solar cells
Metrics
H-Index
i10 Index
Citation Counts
111
565
63,756
* Total H IndexRankings
Ranking Based On Selection: 20
energy
fluids
CO2 conversion
CO2 capture
electrochemical system
Metrics
H-Index
i10 Index
Citation Counts
109
291
44,699
* Total H IndexRankings
Ranking Based On Selection: 21
Biosensor
Metrics
H-Index
i10 Index
Citation Counts
109
658
46,753
* Total H IndexRankings
Ranking Based On Selection: 22
perovskite solar cells
perovskite LEDs
organic solar cells
organic electronic
Metrics
H-Index
i10 Index
Citation Counts
109
282
47,617
* Total H IndexRankings
Ranking Based On Selection: 23
solar cells and modules
building integrated photovoltaics
storage
smart gri
Metrics
H-Index
i10 Index
Citation Counts
109
471
44,499
* Total H IndexRankings
Ranking Based On Selection: 24
Energy
Nanotechnology
Thermodynamics
Interfacial Phenomena and Surface Science
Biofluidic
Metrics
H-Index
i10 Index
Citation Counts
109
438
43,059
* Total H IndexRankings
Ranking Based On Selection: 25
Renewable Energy
Power Electronics
Drives
Electrical Engineerin
Metrics
H-Index
i10 Index
Citation Counts
109
476
46,238
Michael Graetzel
Metrics
H-Index
i10-Index
Citation Counts
311
1,557
505,673
Solar energy conversion
Xiong Wen David Lou
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
229
402
148,851
hollow structures
batteries
electrocatalysis
supercapacitors
photocatalysi
Roberto Castello
Metrics
H-Index
i10-Index
Citation Counts
224
714
209,734
Statistics
Machine Learning
Renewable Energy
Building Physics
Particle Physic
Nazeeruddin
Metrics
H-Index
i10-Index
Citation Counts
196
866
191,401
Yang Yang (楊陽)
University of California Los Angeles
Los Angeles, United States
Metrics
H-Index
i10-Index
Citation Counts
191
511
159,871
solar cells
memory
semiconductor
organic electronics
organic photovoltaics
Arumugam Manthiram
Metrics
H-Index
i10-Index
Citation Counts
174
936
128,330
batteries
fuel cells
materials chemistry
synthesis
nanomaterials
James Robert Durrant
Metrics
H-Index
i10-Index
Citation Counts
162
521
88,152
solar energy
photochemistry
Martin A Green
Metrics
H-Index
i10-Index
Citation Counts
154
785
130,500
Photovoltaics
Semiconductors
Solar Cells
Conversion Efficienc
Jaephil Cho
Metrics
H-Index
i10-Index
Citation Counts
146
419
76,430
Licheng Sun
Royal Institute of Technology
Stockholm, Sweden
Metrics
H-Index
i10-Index
Citation Counts
139
746
79,624
Solar Cells & Solar Fuels
Artificial Photosynthesis
Water Splittin
Is Your University Ready for the Future?
Compare your institution’s global, national, and city-level ranking with its 20 closest competitors and set strategic goals.
Gain insights from detailed performance analyses of scientists across 13 major disciplines, identify your strengths, improve weaknesses, and gain a competitive edge.. Check Your Free Sample Performance Analysis
Jia-Qi Huang 黄佳琦
Beijing Institute of Technology
Beijing, China
Metrics
H-Index
i10-Index
Citation Counts
131
373
65,968
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
128
422
77,733
Electron Microscopy
Tomography
Renewable Energy
Complex Oxides
Ptychograph
Shen Ze Xiang
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
127
445
66,260
energy storage materials
graphene 2D materials
photonics
hybrid perovskite
Kamaruzzaman Sopian
Metrics
H-Index
i10-Index
Citation Counts
123
777
61,461
Energy Engineering
Solar Thermal
Photovoltaics
Renewable Energ
Abdul-Ghani Olabi
Metrics
H-Index
i10-Index
Citation Counts
120
475
49,156
Renewable Energy
Energy Storage Systems
CAD and Design
Smart Materials
Kai Zhu
Metrics
H-Index
i10-Index
Citation Counts
118
239
53,398
Solar Energy Conversion and Storage
Yushan Yan
University of Delaware
Newark, United States
Metrics
H-Index
i10-Index
Citation Counts
117
334
49,764
Electrochemical Engineering
Fuel cells
Hydrogen
Electrocatalysis
Polymer Electrolytes
Madhavi Srinivasan
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
115
394
43,342
Energy storage
Batteries
E-waste/Batteries recycling
Sustainability
Circular econom
Gang Liu (刘岗)
Metrics
H-Index
i10-Index
Citation Counts
111
565
63,756
solar energy conversion materials (potocatalysis
photoelectrochemical
solar cells
David Sinton
University of Toronto
Toronto, Canada
Metrics
H-Index
i10-Index
Citation Counts
109
291
44,699
energy
fluids
CO2 conversion
CO2 capture
electrochemical system
Liu Gang
Central South University
Changsha, China
Metrics
H-Index
i10-Index
Citation Counts
109
658
46,753
Hin-Lap Yip 葉軒立)
City University of Hong Kong
Kowloon, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
109
282
47,617
perovskite solar cells
perovskite LEDs
organic solar cells
organic electronic
Christophe Ballif
Metrics
H-Index
i10-Index
Citation Counts
109
471
44,499
solar cells and modules
building integrated photovoltaics
storage
smart gri
Dimos Poulikakos
Metrics
H-Index
i10-Index
Citation Counts
109
438
43,059
Energy
Nanotechnology
Thermodynamics
Interfacial Phenomena and Surface Science
Biofluidic
Nasrudin Abd Rahim
University of Malaya
Kuala Lumpur, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
109
476
46,238
Renewable Energy
Power Electronics
Drives
Electrical Engineerin