Subject Rankings
Engineering & Technology / Energy Engineering 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 Dec 30, 2024, 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 (874.427) 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
309
1,539
497,563
* Total H IndexRankings
Ranking Based On Selection: 2
hollow structures
batteries
electrocatalysis
supercapacitors
photocatalysis
Metrics
H-Index
i10 Index
Citation Counts
224
397
143,730
* Total H IndexRankings
Ranking Based On Selection: 3
Statistics
Machine Learning
Renewable Energy
Building Physics
Particle Physics
Metrics
H-Index
i10 Index
Citation Counts
220
721
205,177
* Total H IndexRankings
Ranking Based On Selection: 4
solar energy
Metrics
H-Index
i10 Index
Citation Counts
193
838
186,599
* Total H IndexRankings
Ranking Based On Selection: 5
solar cells
memory
semiconductor
organic electronics
organic photovoltaics
Metrics
H-Index
i10 Index
Citation Counts
188
506
157,120
* Total H IndexRankings
Ranking Based On Selection: 6
batteries
fuel cells
materials chemistry
synthesis
nanomaterials
Metrics
H-Index
i10 Index
Citation Counts
172
925
124,253
* Total H IndexRankings
Ranking Based On Selection: 7
solar energy
photochemistry
Metrics
H-Index
i10 Index
Citation Counts
159
513
86,149
* Total H IndexRankings
Ranking Based On Selection: 8
Photovoltaics
Semiconductors
Solar Cells
Conversion Efficiency
Metrics
H-Index
i10 Index
Citation Counts
152
772
126,967
* Total H IndexRankings
Ranking Based On Selection: 9
batteries
nanomaterials
catalysts
Metrics
H-Index
i10 Index
Citation Counts
144
414
74,298
* Total H IndexRankings
Ranking Based On Selection: 10
Solar Cells & Solar Fuels
Artificial Photosynthesis
Water Splitting
Metrics
H-Index
i10 Index
Citation Counts
136
718
76,609
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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
128
361
62,615
* Total H IndexRankings
Ranking Based On Selection: 12
Electron Microscopy
Tomography
Renewable Energy
Complex Oxides
Ptychography
Metrics
H-Index
i10 Index
Citation Counts
126
407
73,928
* Total H IndexRankings
Ranking Based On Selection: 13
energy storage materials
graphene 2D materials
photonics
hybrid perovskites
Metrics
H-Index
i10 Index
Citation Counts
125
431
64,016
* Total H IndexRankings
Ranking Based On Selection: 14
Energy Studies
Solar Thermal
Photovoltaics
Renewable Energy
Metrics
H-Index
i10 Index
Citation Counts
119
728
57,778
* Total H IndexRankings
Ranking Based On Selection: 15
Solar Energy Conversion and Storage
Metrics
H-Index
i10 Index
Citation Counts
117
230
50,921
* 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
115
459
45,024
* Total H IndexRankings
Ranking Based On Selection: 17
Electrochemical Engineering
Fuel cells
Hydrogen
Electrocatalysis
Polymer Electrolytes
Metrics
H-Index
i10 Index
Citation Counts
115
331
48,061
* 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
111
380
41,086
* Total H IndexRankings
Ranking Based On Selection: 19
perovskite solar cells
perovskite LEDs
organic solar cells
organic electronics
Metrics
H-Index
i10 Index
Citation Counts
107
272
45,254
* Total H IndexRankings
Ranking Based On Selection: 20
Energy
Nanotechnology
Thermodynamics
Interfacial Phenomena and Surface Science
Biofluidics
Metrics
H-Index
i10 Index
Citation Counts
107
430
41,728
* Total H IndexRankings
Ranking Based On Selection: 21
Renewable Energy
Power Electronics
Drives
Electrical Engineering
Metrics
H-Index
i10 Index
Citation Counts
106
461
43,769
* Total H IndexRankings
Ranking Based On Selection: 22
Engine Combustion
bio-fuel
ragne extender
Metrics
H-Index
i10 Index
Citation Counts
106
840
53,538
* 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
106
453
42,314
* Total H IndexRankings
Ranking Based On Selection: 24
renewable energy
sustainability assessment
techno-economic
Metrics
H-Index
i10 Index
Citation Counts
104
570
40,850
* Total H IndexRankings
Ranking Based On Selection: 25
energy
fluids
CO2 conversion
CO2 capture
electrochemical systems
Metrics
H-Index
i10 Index
Citation Counts
103
283
40,937
Michael Graetzel
Metrics
H-Index
i10-Index
Citation Counts
309
1,539
497,563
Xiong Wen David Lou
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
224
397
143,730
hollow structures
batteries
electrocatalysis
supercapacitors
photocatalysis
Roberto Castello
Metrics
H-Index
i10-Index
Citation Counts
220
721
205,177
Statistics
Machine Learning
Renewable Energy
Building Physics
Particle Physics
Nazeeruddin
Metrics
H-Index
i10-Index
Citation Counts
193
838
186,599
Yang Yang (楊陽）
University of California Los Angeles
Los Angeles, United States
Metrics
H-Index
i10-Index
Citation Counts
188
506
157,120
solar cells
memory
semiconductor
organic electronics
organic photovoltaics
Arumugam Manthiram
Metrics
H-Index
i10-Index
Citation Counts
172
925
124,253
batteries
fuel cells
materials chemistry
synthesis
nanomaterials
James Robert Durrant
Metrics
H-Index
i10-Index
Citation Counts
159
513
86,149
solar energy
photochemistry
Martin A Green
Metrics
H-Index
i10-Index
Citation Counts
152
772
126,967
Photovoltaics
Semiconductors
Solar Cells
Conversion Efficiency
Jaephil Cho
Metrics
H-Index
i10-Index
Citation Counts
144
414
74,298
batteries
nanomaterials
catalysts
Licheng Sun
Royal Institute of Technology
Stockholm, Sweden
Metrics
H-Index
i10-Index
Citation Counts
136
718
76,609
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
128
361
62,615
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
407
73,928
Electron Microscopy
Tomography
Renewable Energy
Complex Oxides
Ptychography
Shen Ze Xiang
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
125
431
64,016
energy storage materials
graphene 2D materials
photonics
hybrid perovskites
Kamaruzzaman Sopian
Metrics
H-Index
i10-Index
Citation Counts
119
728
57,778
Energy Studies
Solar Thermal
Photovoltaics
Renewable Energy
Kai Zhu
Metrics
H-Index
i10-Index
Citation Counts
117
230
50,921
Solar Energy Conversion and Storage
Abdul-Ghani Olabi
Metrics
H-Index
i10-Index
Citation Counts
115
459
45,024
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
115
331
48,061
Electrochemical Engineering
Fuel cells
Hydrogen
Electrocatalysis
Polymer Electrolytes
Madhavi Srinivasan
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
111
380
41,086
Energy storage
Batteries
E-waste/Batteries recycling
Sustainability
Circular economy
Hin-Lap Yip 葉軒立）
City University of Hong Kong
Coimbatore, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
107
272
45,254
perovskite solar cells
perovskite LEDs
organic solar cells
organic electronics
Dimos Poulikakos
Metrics
H-Index
i10-Index
Citation Counts
107
430
41,728
Energy
Nanotechnology
Thermodynamics
Interfacial Phenomena and Surface Science
Biofluidics
Nasrudin Abd Rahim
University of Malaya
Kuala Lumpur, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
106
461
43,769
Renewable Energy
Power Electronics
Drives
Electrical Engineering
Liguang Liu
Tongji University
Shanghai, China
Metrics
H-Index
i10-Index
Citation Counts
106
840
53,538
Engine Combustion
bio-fuel
ragne extender
Christophe Ballif
Metrics
H-Index
i10-Index
Citation Counts
106
453
42,314
solar cells and modules
building integrated photovoltaics
storage
smart grid
liu gang
Central South University
Changsha, China
Metrics
H-Index
i10-Index
Citation Counts
104
570
40,850
renewable energy
sustainability assessment
techno-economic
David Sinton
University of Toronto
Toronto, Canada
Metrics
H-Index
i10-Index
Citation Counts
103
283
40,937
energy
fluids
CO2 conversion
CO2 capture
electrochemical systems