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 Jun 12, 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 (1.121.291) 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 conversio
Metrics
H-Index
i10 Index
Citation Counts
312
1,567
512,266
Get Full Access to Premium Data
* Total H IndexRankings
Ranking Based On Selection: 2
hollow structures
batteries
electrocatalysis
supercapacitors
photocatalysi
Metrics
H-Index
i10 Index
Citation Counts
230
403
150,044
* Total H IndexRankings
Ranking Based On Selection: 3
Statistics
Machine Learning
Renewable Energy
Building Physics
Particle Physic
Metrics
H-Index
i10 Index
Citation Counts
225
713
213,626
* 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 photovoltaic
Metrics
H-Index
i10 Index
Citation Counts
192
511
161,642
* Total H IndexRankings
Ranking Based On Selection: 6
batteries
fuel cells
materials chemistry
synthesis
nanomaterial
Metrics
H-Index
i10 Index
Citation Counts
176
950
131,100
* Total H IndexRankings
Ranking Based On Selection: 7
solar energy
photochemistr
Metrics
H-Index
i10 Index
Citation Counts
163
530
89,749
* Total H IndexRankings
Ranking Based On Selection: 8
Photovoltaics
Semiconductors
Solar Cells
Conversion Efficienc
Metrics
H-Index
i10 Index
Citation Counts
154
786
131,804
* Total H IndexRankings
Ranking Based On Selection: 9
batterie
Metrics
H-Index
i10 Index
Citation Counts
148
423
77,496
* Total H IndexRankings
Ranking Based On Selection: 10
Solar Cells & Solar Fuels
Artificial Photosynthesis
Water Splitting
AEM-WE
CO2 Reductio
Metrics
H-Index
i10 Index
Citation Counts
139
758
80,744
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
* Total H IndexRankings
Ranking Based On Selection: 11
Energy storage
Li-S batteries
Lithium metal anode
Carbon nanomaterials
Fluidized be
Metrics
H-Index
i10 Index
Citation Counts
137
379
69,407
* Total H IndexRankings
Ranking Based On Selection: 12
Electron Microscopy
Tomography
Renewable Energy
Complex Oxides
Ptychograph
Metrics
H-Index
i10 Index
Citation Counts
129
427
78,816
* 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
447
66,811
* Total H IndexRankings
Ranking Based On Selection: 14
Renewable Energy
Energy Storage Systems
CAD and Design
Smart Material
Metrics
H-Index
i10 Index
Citation Counts
124
487
51,600
* Total H IndexRankings
Ranking Based On Selection: 15
Energy Engineering
Solar Thermal
Photovoltaics
Renewable Energ
Metrics
H-Index
i10 Index
Citation Counts
123
787
62,678
* Total H IndexRankings
Ranking Based On Selection: 16
Solar Energy Conversion and Storag
Metrics
H-Index
i10 Index
Citation Counts
119
240
54,840
* Total H IndexRankings
Ranking Based On Selection: 17
Electrochemical Engineering
Fuel cells
Hydrogen
Electrocatalysis
Polymer Electrolyte
Metrics
H-Index
i10 Index
Citation Counts
119
337
50,796
* 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
43,819
* Total H IndexRankings
Ranking Based On Selection: 19
solar energy conversion materials (potocatalysis
photoelectrochemical
solar cells
Metrics
H-Index
i10 Index
Citation Counts
112
583
64,866
* Total H IndexRankings
Ranking Based On Selection: 20
Biosenso
Metrics
H-Index
i10 Index
Citation Counts
111
705
49,623
* Total H IndexRankings
Ranking Based On Selection: 21
energy
fluids
CO2 conversion
CO2 capture
electrochemical system
Metrics
H-Index
i10 Index
Citation Counts
110
294
45,894
* Total H IndexRankings
Ranking Based On Selection: 22
Renewable Energy
Power Electronics
Drives
Electrical Engineerin
Metrics
H-Index
i10 Index
Citation Counts
110
479
46,909
* Total H IndexRankings
Ranking Based On Selection: 23
perovskite solar cells
perovskite LEDs
organic solar cells
organic electronic
Metrics
H-Index
i10 Index
Citation Counts
110
284
48,257
* Total H IndexRankings
Ranking Based On Selection: 24
solar cells and modules
building integrated photovoltaics
storage
smart gri
Metrics
H-Index
i10 Index
Citation Counts
110
474
45,055
* Total H IndexRankings
Ranking Based On Selection: 25
Energy
Nanotechnology
Thermodynamics
Interfacial Phenomena and Surface Science
Biofluidic
Metrics
H-Index
i10 Index
Citation Counts
110
438
43,455
Xiong Wen David Lou
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
230
403
150,044
hollow structures
batteries
electrocatalysis
supercapacitors
photocatalysi
Roberto Castello
Metrics
H-Index
i10-Index
Citation Counts
225
713
213,626
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
192
511
161,642
solar cells
memory
semiconductor
organic electronics
organic photovoltaic
Arumugam Manthiram
Metrics
H-Index
i10-Index
Citation Counts
176
950
131,100
batteries
fuel cells
materials chemistry
synthesis
nanomaterial
James Robert Durrant
Metrics
H-Index
i10-Index
Citation Counts
163
530
89,749
solar energy
photochemistr
Martin A Green
Metrics
H-Index
i10-Index
Citation Counts
154
786
131,804
Photovoltaics
Semiconductors
Solar Cells
Conversion Efficienc
Jaephil Cho
Metrics
H-Index
i10-Index
Citation Counts
148
423
77,496
Licheng Sun
Royal Institute of Technology
Stockholm, Sweden
Metrics
H-Index
i10-Index
Citation Counts
139
758
80,744
Solar Cells & Solar Fuels
Artificial Photosynthesis
Water Splitting
AEM-WE
CO2 Reductio
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
137
379
69,407
Energy storage
Li-S batteries
Lithium metal anode
Carbon nanomaterials
Fluidized be
David A Muller
Cornell University
Ithaca, United States
Metrics
H-Index
i10-Index
Citation Counts
129
427
78,816
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
447
66,811
energy storage materials
graphene 2D materials
photonics
hybrid perovskite
Abdul-Ghani Olabi
Metrics
H-Index
i10-Index
Citation Counts
124
487
51,600
Renewable Energy
Energy Storage Systems
CAD and Design
Smart Material
Kamaruzzaman Sopian
Metrics
H-Index
i10-Index
Citation Counts
123
787
62,678
Energy Engineering
Solar Thermal
Photovoltaics
Renewable Energ
Yushan Yan
University of Delaware
Newark, United States
Metrics
H-Index
i10-Index
Citation Counts
119
337
50,796
Electrochemical Engineering
Fuel cells
Hydrogen
Electrocatalysis
Polymer Electrolyte
Madhavi Srinivasan
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
115
394
43,819
Energy storage
Batteries
E-waste/Batteries recycling
Sustainability
Circular econom
Gang Liu (刘岗)
Metrics
H-Index
i10-Index
Citation Counts
112
583
64,866
solar energy conversion materials (potocatalysis
photoelectrochemical
solar cells
Liu Gang
Central South University
Changsha, China
Metrics
H-Index
i10-Index
Citation Counts
111
705
49,623
David Sinton
University of Toronto
Toronto, Canada
Metrics
H-Index
i10-Index
Citation Counts
110
294
45,894
energy
fluids
CO2 conversion
CO2 capture
electrochemical system
Nasrudin Abd Rahim
University of Malaya
Kuala Lumpur, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
110
479
46,909
Renewable Energy
Power Electronics
Drives
Electrical Engineerin
Hin-Lap Yip 葉軒立)
City University of Hong Kong
Kowloon, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
110
284
48,257
perovskite solar cells
perovskite LEDs
organic solar cells
organic electronic
Christophe Ballif
Metrics
H-Index
i10-Index
Citation Counts
110
474
45,055
solar cells and modules
building integrated photovoltaics
storage
smart gri
Dimos Poulikakos
Metrics
H-Index
i10-Index
Citation Counts
110
438
43,455
Energy
Nanotechnology
Thermodynamics
Interfacial Phenomena and Surface Science
Biofluidic