Citation Rankings (Highly Cited Researchers) 2024 and list of influential and most cited researchers in Agriculture and Forestry, Art, Design and Architecture, Business and Management, Economics and Econometrics, Education, Engineering and Technology, History, Philosophy, Theology, Law, Medicine and Health Sciences, Natural Sciences and Social Sciences and their 256 sub-branches is a unique service offered only by “AD Scientific Index”. You can see the most cited and influential researchers in the country and region. See also for more specific citation analyses: "last 6 years citation index" Universities Rankings 2024 (Sort by: Total Citations) and Universities Rankings 2024 (Sort by : Last 6 Years Citations)
* Total Citation Counts Rankings
World Rank
11,112
Country Rank
5,291
Institution Rank : 3
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Michael Himmel](https://cdn.adscientificindex.com/pictures/fe/4387502.jpg)
cellulase
biomass
pretreatment
chromatography
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
45,792
16,751
0.366
* Total Citation Counts Rankings
World Rank
13,485
Country Rank
6,425
Institution Rank : 4
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![David Ginley](https://cdn.adscientificindex.com/pictures/91/4393954.jpg)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
40,624
9,541
0.235
* Total Citation Counts Rankings
World Rank
20,541
Country Rank
9,580
Institution Rank : 9
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Nikos Kopidakis](https://cdn.adscientificindex.com/pictures/cf/4388464.jpg)
Photovoltaics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31,107
11,583
0.372
* Total Citation Counts Rankings
World Rank
21,893
Country Rank
10,156
Institution Rank : 11
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Justin Johnson](https://cdn.adscientificindex.com/pictures/48/4399126.jpg)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,825
7,136
0.239
* Total Citation Counts Rankings
World Rank
23,469
Country Rank
10,872
Institution Rank : 14
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Keith A Emery](https://cdn.adscientificindex.com/pictures/50/4399484.jpg)
Photovoltaics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,562
5,404
0.189
* Total Citation Counts Rankings
World Rank
26,381
Country Rank
12,142
Institution Rank : 15
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Jason Jonkman](https://cdn.adscientificindex.com/pictures/cc/4397548.jpg)
Wind energy
Wind Power
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,428
13,869
0.525
* Total Citation Counts Rankings
World Rank
32,130
Country Rank
14,577
Institution Rank : 17
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Michael F Crowley](/user/assets/images/profile/no-profile-photo.png)
Biofuels
molecular dynamics
simulation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,143
8,186
0.354
* Total Citation Counts Rankings
World Rank
35,588
Country Rank
16,030
Institution Rank : 18
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Michael Seibert](/user/assets/images/profile/no-profile-photo.png)
photosynthesis
photosystem II reaction center
algae
hydrogen
cell culture
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,507
4,396
0.204
* Total Citation Counts Rankings
World Rank
45,767
Country Rank
20,063
Institution Rank : 21
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Garry Rumbles](https://cdn.adscientificindex.com/pictures/62/4395805.jpg)
photochemistry
solar energy
time-resolved microwave conductivity
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,934
5,186
0.289
* Total Citation Counts Rankings
World Rank
46,818
Country Rank
20,477
Institution Rank : 22
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![David K Johnson](/user/assets/images/profile/no-profile-photo.png)
Biofuels
Catalysis
Electrochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,632
6,552
0.372
* Total Citation Counts Rankings
World Rank
46,881
Country Rank
20,504
Institution Rank : 23
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Anthony K Burrell](/user/assets/images/profile/no-profile-photo.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,612
6,511
0.370
* Total Citation Counts Rankings
World Rank
49,153
Country Rank
21,381
Institution Rank : 25
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Bryan Pivovar](/user/assets/images/profile/no-profile-photo.png)
fuel cells
electrolysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,019
8,273
0.486
* Total Citation Counts Rankings
World Rank
51,017
Country Rank
22,108
Institution Rank : 26
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Amie Sluiter](https://cdn.adscientificindex.com/pictures/50/4390762.jpg)
Bioenergy Biomass
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,543
8,290
0.501
* Total Citation Counts Rankings
World Rank
52,467
Country Rank
22,701
Institution Rank : 28
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Emily Warren](https://cdn.adscientificindex.com/pictures/b9/4395050.jpg)
Photovoltaics
Tandem solar cells
Heteroepitaxy
Silicon Microwires
Photoelectrochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,203
7,094
0.438
* Total Citation Counts Rankings
World Rank
52,608
Country Rank
22,759
Institution Rank : 29
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Daniel J Friedman](https://cdn.adscientificindex.com/pictures/e6/4393694.jpg)
photovoltaics
multijunction solar cells
concentrating photovoltaics
solar cells
thermophotovoltaics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,173
3,929
0.243
* Total Citation Counts Rankings
World Rank
53,802
Country Rank
23,225
Institution Rank : 31
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![John Geisz](/user/assets/images/profile/no-profile-photo.png)
solar cells
OMVPE
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,907
5,314
0.334
* Total Citation Counts Rankings
World Rank
56,288
Country Rank
24,174
Institution Rank : 34
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Garvin Heath](https://cdn.adscientificindex.com/pictures/f0/4395809.jpg)
greenhouse gas
energy
land
water
life cycle assessment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,377
8,814
0.573
* Total Citation Counts Rankings
World Rank
61,639
Country Rank
26,197
Institution Rank : 36
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Mark Nimlos](https://cdn.adscientificindex.com/pictures/4b/4386779.jpg)
Production of Fuels and Chemicals from Biomass
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,343
4,138
0.289
* Total Citation Counts Rankings
World Rank
62,564
Country Rank
26,527
Institution Rank : 37
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Mark F Davis](https://cdn.adscientificindex.com/pictures/26/4386744.jpg)
Bioenergy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,182
6,745
0.476
* Total Citation Counts Rankings
World Rank
63,735
Country Rank
26,985
Institution Rank : 38
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Robert Margolis](https://cdn.adscientificindex.com/pictures/21/4381154.jpg)
Solar Photovoltaics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,981
8,199
0.586
* Total Citation Counts Rankings
World Rank
65,445
Country Rank
27,616
Institution Rank : 39
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Craig L Perkins](https://cdn.adscientificindex.com/pictures/b9/4393450.jpg)
Photovoltaics
surface science
solar fuels
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,709
3,921
0.286
* Total Citation Counts Rankings
World Rank
66,071
Country Rank
27,855
Institution Rank : 40
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Matthew O Reese](/user/assets/images/profile/no-profile-photo.png)
photovoltaics
CdTe
OPV
reliability
WVTR
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,607
8,091
0.595
* Total Citation Counts Rankings
World Rank
66,436
Country Rank
28,003
Institution Rank : 41
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Shyam S Kocha](https://cdn.adscientificindex.com/pictures/11/4382366.jpg)
Fuel Cells & Electrolyzers
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,554
4,797
0.354
* Total Citation Counts Rankings
World Rank
69,420
Country Rank
29,075
Institution Rank : 42
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Qi Jiang(蒋琦)](https://cdn.adscientificindex.com/pictures/dd/4389507.jpg)
Perovskite,PV
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,097
12,223
0.933
* Total Citation Counts Rankings
World Rank
70,652
Country Rank
29,513
Institution Rank : 43
![](https://cdn.adscientificindex.com/logos/15819.png)
![United States](/flags/us.png)
![Thomas Foust](https://cdn.adscientificindex.com/pictures/95/4383414.jpg)
Bioenergy
Economic Analysis
Sustainability
Chemical Kinetics
Multiphase Flow
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,915
4,277
0.331
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
11,112
![United States](/flags/us.png)
5,291
![](https://cdn.adscientificindex.com/logos/15819.png)
3
Michael Himmel
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
45,792
16,751
0.366
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
13,485
![United States](/flags/us.png)
6,425
![](https://cdn.adscientificindex.com/logos/15819.png)
4
David Ginley
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
40,624
9,541
0.235
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
20,541
![United States](/flags/us.png)
9,580
![](https://cdn.adscientificindex.com/logos/15819.png)
9
Nikos Kopidakis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31,107
11,583
0.372
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
21,893
![United States](/flags/us.png)
10,156
![](https://cdn.adscientificindex.com/logos/15819.png)
11
Justin Johnson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,825
7,136
0.239
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
23,469
![United States](/flags/us.png)
10,872
![](https://cdn.adscientificindex.com/logos/15819.png)
14
Keith A Emery
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,562
5,404
0.189
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
26,381
![United States](/flags/us.png)
12,142
![](https://cdn.adscientificindex.com/logos/15819.png)
15
Jason Jonkman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,428
13,869
0.525
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
32,130
![United States](/flags/us.png)
14,577
![](https://cdn.adscientificindex.com/logos/15819.png)
17
Michael F Crowley
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,143
8,186
0.354
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
35,588
![United States](/flags/us.png)
16,030
![](https://cdn.adscientificindex.com/logos/15819.png)
18
Michael Seibert
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,507
4,396
0.204
![](https://cdn.adscientificindex.com/logos/15819.png)
photosynthesis
photosystem II reaction center
algae
hydrogen
cell culture
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
45,767
![United States](/flags/us.png)
20,063
![](https://cdn.adscientificindex.com/logos/15819.png)
21
Garry Rumbles
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,934
5,186
0.289
![](https://cdn.adscientificindex.com/logos/15819.png)
photochemistry
solar energy
time-resolved microwave conductivity
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
46,818
![United States](/flags/us.png)
20,477
![](https://cdn.adscientificindex.com/logos/15819.png)
22
David K Johnson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,632
6,552
0.372
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* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
46,881
![United States](/flags/us.png)
20,504
![](https://cdn.adscientificindex.com/logos/15819.png)
23
Anthony K Burrell
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,612
6,511
0.370
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
49,153
![United States](/flags/us.png)
21,381
![](https://cdn.adscientificindex.com/logos/15819.png)
25
Bryan Pivovar
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,019
8,273
0.486
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
51,017
![United States](/flags/us.png)
22,108
![](https://cdn.adscientificindex.com/logos/15819.png)
26
Amie Sluiter
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,543
8,290
0.501
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
52,467
![United States](/flags/us.png)
22,701
![](https://cdn.adscientificindex.com/logos/15819.png)
28
Emily Warren
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,203
7,094
0.438
![](https://cdn.adscientificindex.com/logos/15819.png)
Photovoltaics
Tandem solar cells
Heteroepitaxy
Silicon Microwires
Photoelectrochemistry
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
52,608
![United States](/flags/us.png)
22,759
![](https://cdn.adscientificindex.com/logos/15819.png)
29
Daniel J Friedman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,173
3,929
0.243
![](https://cdn.adscientificindex.com/logos/15819.png)
photovoltaics
multijunction solar cells
concentrating photovoltaics
solar cells
thermophotovoltaics
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
53,802
![United States](/flags/us.png)
23,225
![](https://cdn.adscientificindex.com/logos/15819.png)
31
John Geisz
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,907
5,314
0.334
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
56,288
![United States](/flags/us.png)
24,174
![](https://cdn.adscientificindex.com/logos/15819.png)
34
Garvin Heath
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,377
8,814
0.573
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
61,639
![United States](/flags/us.png)
26,197
![](https://cdn.adscientificindex.com/logos/15819.png)
36
Mark Nimlos
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,343
4,138
0.289
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
62,564
![United States](/flags/us.png)
26,527
![](https://cdn.adscientificindex.com/logos/15819.png)
37
Mark F Davis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,182
6,745
0.476
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
63,735
![United States](/flags/us.png)
26,985
![](https://cdn.adscientificindex.com/logos/15819.png)
38
Robert Margolis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,981
8,199
0.586
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
65,445
![United States](/flags/us.png)
27,616
![](https://cdn.adscientificindex.com/logos/15819.png)
39
Craig L Perkins
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,709
3,921
0.286
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
66,071
![United States](/flags/us.png)
27,855
![](https://cdn.adscientificindex.com/logos/15819.png)
40
Matthew O Reese
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,607
8,091
0.595
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
66,436
![United States](/flags/us.png)
28,003
![](https://cdn.adscientificindex.com/logos/15819.png)
41
Shyam S Kocha
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,554
4,797
0.354
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
69,420
![United States](/flags/us.png)
29,075
![](https://cdn.adscientificindex.com/logos/15819.png)
42
Qi Jiang(蒋琦)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,097
12,223
0.933
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
70,652
![United States](/flags/us.png)
29,513
![](https://cdn.adscientificindex.com/logos/15819.png)
43
Thomas Foust
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,915
4,277
0.331
![](https://cdn.adscientificindex.com/logos/15819.png)
Bioenergy
Economic Analysis
Sustainability
Chemical Kinetics
Multiphase Flow