University, Subject, Country, Region, World
National Renewable Energy Laboratory 670 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 04, 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 (1.121.279) 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 and Storag
Metrics
H-Index
i10 Index
Citation Counts
119
240
54,840
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* Total H IndexRankings
Ranking Based On Selection: 2
Biochemicals
Biofuels
Green Chemistry
Lignin
Plastics Recyclin
Metrics
H-Index
i10 Index
Citation Counts
106
286
41,331
* Total H IndexRankings
Ranking Based On Selection: 3
Energy
Nanoscience
Next Generation Solar Photoconversio
Metrics
H-Index
i10 Index
Citation Counts
102
224
53,560
* Total H IndexRankings
Ranking Based On Selection: 4
Metrics
H-Index
i10 Index
Citation Counts
99
394
41,727
* Total H IndexRankings
Ranking Based On Selection: 5
cellulase
biomass
pretreatment
chromatograph
Metrics
H-Index
i10 Index
Citation Counts
96
356
47,724
* Total H IndexRankings
Ranking Based On Selection: 6
Solar energy conversion
Terahertz spectroscopy
Multiple Exciton Generation
Chiralit
Metrics
H-Index
i10 Index
Citation Counts
93
201
41,101
* Total H IndexRankings
Ranking Based On Selection: 7
Physics
perovskites
organics
magnetics
material
Metrics
H-Index
i10 Index
Citation Counts
87
191
33,742
* Total H IndexRankings
Ranking Based On Selection: 8
Photovoltaic devices and material
Metrics
H-Index
i10 Index
Citation Counts
86
342
34,858
* Total H IndexRankings
Ranking Based On Selection: 9
Perovskites
Quantum dots
nanocrystals
photovoltaics
quantum dot solar cell
Metrics
H-Index
i10 Index
Citation Counts
84
167
40,414
* Total H IndexRankings
Ranking Based On Selection: 10
Semiconductors
solar cell materials and device
Metrics
H-Index
i10 Index
Citation Counts
79
355
25,572
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* Total H IndexRankings
Ranking Based On Selection: 11
Renewable Energ
Metrics
H-Index
i10 Index
Citation Counts
77
162
22,913
* Total H IndexRankings
Ranking Based On Selection: 12
defect and alloy theory
materials design
energy materials
transition metal oxide
Metrics
H-Index
i10 Index
Citation Counts
73
159
21,498
* Total H IndexRankings
Ranking Based On Selection: 13
photochemistry
solar energy
time-resolved microwave conductivit
Metrics
H-Index
i10 Index
Citation Counts
72
177
18,599
* Total H IndexRankings
Ranking Based On Selection: 14
Wind energy
Wind Powe
Metrics
H-Index
i10 Index
Citation Counts
71
186
29,167
* Total H IndexRankings
Ranking Based On Selection: 15
Metrics
H-Index
i10 Index
Citation Counts
70
222
18,415
* Total H IndexRankings
Ranking Based On Selection: 16
photosynthesis
photosystem II reaction center
algae
hydrogen
cell cultur
Metrics
H-Index
i10 Index
Citation Counts
69
186
22,026
* Total H IndexRankings
Ranking Based On Selection: 17
Energy Systems Analysis
Renewable Energy Integration
Power Systems
Process Systems Engineerin
Metrics
H-Index
i10 Index
Citation Counts
67
185
17,415
* Total H IndexRankings
Ranking Based On Selection: 18
fuel cells
electrolysi
Metrics
H-Index
i10 Index
Citation Counts
65
148
18,503
* Total H IndexRankings
Ranking Based On Selection: 19
Biofuels
molecular dynamics
simulatio
Metrics
H-Index
i10 Index
Citation Counts
64
136
23,536
* Total H IndexRankings
Ranking Based On Selection: 20
Solar Photovoltaic
Metrics
H-Index
i10 Index
Citation Counts
62
159
15,128
* Total H IndexRankings
Ranking Based On Selection: 21
Photovoltaic
Metrics
H-Index
i10 Index
Citation Counts
62
183
29,515
* Total H IndexRankings
Ranking Based On Selection: 22
photovoltaics
multijunction solar cells
concentrating photovoltaics
solar cells
thermophotovoltaic
Metrics
H-Index
i10 Index
Citation Counts
61
198
16,654
* Total H IndexRankings
Ranking Based On Selection: 23
Photovoltaic
Metrics
H-Index
i10 Index
Citation Counts
61
109
34,658
* Total H IndexRankings
Ranking Based On Selection: 24
Production of Fuels and Chemicals from Biomas
Metrics
H-Index
i10 Index
Citation Counts
61
94
14,799
* Total H IndexRankings
Ranking Based On Selection: 25
Electrocatalysis
CO2 Reduction
In situ/Operando Spectroscopy
Photoelectrochemistry
Electrochemical Engineerin
Metrics
H-Index
i10 Index
Citation Counts
60
112
14,577
Gregg T Beckham
Metrics
H-Index
i10-Index
Citation Counts
106
286
41,331
Biochemicals
Biofuels
Green Chemistry
Lignin
Plastics Recyclin
Arthur Nozik
Metrics
H-Index
i10-Index
Citation Counts
102
224
53,560
Energy
Nanoscience
Next Generation Solar Photoconversio
David Ginley
Metrics
H-Index
i10-Index
Citation Counts
99
394
41,727
Michael Himmel
Metrics
H-Index
i10-Index
Citation Counts
96
356
47,724
Matthew C Beard
Metrics
H-Index
i10-Index
Citation Counts
93
201
41,101
Solar energy conversion
Terahertz spectroscopy
Multiple Exciton Generation
Chiralit
Joseph J Berry
Metrics
H-Index
i10-Index
Citation Counts
87
191
33,742
Physics
perovskites
organics
magnetics
material
Sarah Kurtz
Metrics
H-Index
i10-Index
Citation Counts
86
342
34,858
Photovoltaic devices and material
Joseph M Luther
Metrics
H-Index
i10-Index
Citation Counts
84
167
40,414
Perovskites
Quantum dots
nanocrystals
photovoltaics
quantum dot solar cell
Mowafak Al-Jassim
Metrics
H-Index
i10-Index
Citation Counts
79
355
25,572
Semiconductors
solar cell materials and device
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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
Paul Denholm
Metrics
H-Index
i10-Index
Citation Counts
77
162
22,913
Stephan Lany
Metrics
H-Index
i10-Index
Citation Counts
73
159
21,498
defect and alloy theory
materials design
energy materials
transition metal oxide
Garry Rumbles
Metrics
H-Index
i10-Index
Citation Counts
72
177
18,599
photochemistry
solar energy
time-resolved microwave conductivit
Jason Jonkman
Metrics
H-Index
i10-Index
Citation Counts
71
186
29,167
Anthony K Burrell
Metrics
H-Index
i10-Index
Citation Counts
70
222
18,415
Michael Seibert
Metrics
H-Index
i10-Index
Citation Counts
69
186
22,026
photosynthesis
photosystem II reaction center
algae
hydrogen
cell cultur
Bri-Mathias Hodge
Metrics
H-Index
i10-Index
Citation Counts
67
185
17,415
Energy Systems Analysis
Renewable Energy Integration
Power Systems
Process Systems Engineerin
Bryan Pivovar
Metrics
H-Index
i10-Index
Citation Counts
65
148
18,503
Michael F Crowley
Metrics
H-Index
i10-Index
Citation Counts
64
136
23,536
Robert Margolis
Metrics
H-Index
i10-Index
Citation Counts
62
159
15,128
Keith A Emery
Metrics
H-Index
i10-Index
Citation Counts
62
183
29,515
Daniel J Friedman
Metrics
H-Index
i10-Index
Citation Counts
61
198
16,654
photovoltaics
multijunction solar cells
concentrating photovoltaics
solar cells
thermophotovoltaic
Nikos Kopidakis
Metrics
H-Index
i10-Index
Citation Counts
61
109
34,658
Mark Nimlos
Metrics
H-Index
i10-Index
Citation Counts
61
94
14,799
Wilson A Smith
Metrics
H-Index
i10-Index
Citation Counts
60
112
14,577
Electrocatalysis
CO2 Reduction
In situ/Operando Spectroscopy
Photoelectrochemistry
Electrochemical Engineerin