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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 5 years. As of Jan 03, 2026, 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 (1.131.752) 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 Index Rankings
Rankings
2,296
World Rank
77
Country Rank
2
University
Ranking Based On Selection:
1
Engineering & Technology / Energy Engineering
Energy storage | Li-S batteries | Lithium metal anode | Carbon nanomaterials | Fluidized be
Energy storage | Li-S batteries | Lithium metal anode | Carbon nanomaterials | Fluidized be
H-Index Metrics
-
H-Index147
-
i10 Index401
-
Citation Counts76,758
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* Total H Index Rankings
Rankings
5,423
World Rank
222
Country Rank
2
University
Ranking Based On Selection:
2
Engineering & Technology / Energy Engineering
solar energy conversion materials (potocatalysis | photoelectrochemical | solar cells
solar energy conversion materials (potocatalysis | photoelectrochemical | solar cells
H-Index Metrics
-
H-Index119
-
i10 Index756
-
Citation Counts76,529
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* Total H Index Rankings
Rankings
5,813
World Rank
241
Country Rank
2
University
Ranking Based On Selection:
3
* Total H Index Rankings
Rankings
6,880
World Rank
297
Country Rank
2
University
Ranking Based On Selection:
4
* Total H Index Rankings
Rankings
8,763
World Rank
409
Country Rank
16
University
Ranking Based On Selection:
5
Engineering & Technology / Energy Engineering
Energy materials | Energy storage and conversion | MOFs | Phase change materials | Nanoporous material
Energy materials | Energy storage and conversion | MOFs | Phase change materials | Nanoporous material
H-Index Metrics
-
H-Index105
-
i10 Index276
-
Citation Counts43,560
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* Total H Index Rankings
Rankings
10,173
World Rank
476
Country Rank
10
University
Ranking Based On Selection:
6
Engineering & Technology / Energy Engineering
Heat transfer | Energy conservation | Electronics cooling | Porous media | Nano-scale heat transfe
Heat transfer | Energy conservation | Electronics cooling | Porous media | Nano-scale heat transfe
H-Index Metrics
-
H-Index101
-
i10 Index948
-
Citation Counts58,832
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* Total H Index Rankings
Rankings
10,970
World Rank
519
Country Rank
12
University
Ranking Based On Selection:
7
Engineering & Technology / Energy Engineering
Thermal Sciences | Heat Transfer | Phase-Change Heat Transfer | Thermal Storage | Thermal Managemen
Thermal Sciences | Heat Transfer | Phase-Change Heat Transfer | Thermal Storage | Thermal Managemen
H-Index Metrics
-
H-Index99
-
i10 Index284
-
Citation Counts45,371
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* Total H Index Rankings
Rankings
10,972
World Rank
520
Country Rank
13
University
Ranking Based On Selection:
8
Engineering & Technology / Energy Engineering
Energy Storage Materials | Lithium/Sodium Ion Batteries | Supercapacitor
Energy Storage Materials | Lithium/Sodium Ion Batteries | Supercapacitor
H-Index Metrics
-
H-Index99
-
i10 Index233
-
Citation Counts30,204
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* Total H Index Rankings
Rankings
12,287
World Rank
579
Country Rank
19
University
Ranking Based On Selection:
9
* Total H Index Rankings
Rankings
12,703
World Rank
605
Country Rank
11
University
Ranking Based On Selection:
10
Engineering & Technology / Energy Engineering
Energy chemistry | Lithium-sulfur battery | Lithium metal batter
Energy chemistry | Lithium-sulfur battery | Lithium metal batter
H-Index Metrics
-
H-Index95
-
i10 Index169
-
Citation Counts28,935
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* Total H Index Rankings
Rankings
13,713
World Rank
656
Country Rank
6
University
Ranking Based On Selection:
11
* Total H Index Rankings
Rankings
14,250
World Rank
685
Country Rank
10
University
Ranking Based On Selection:
12
* Total H Index Rankings
Rankings
14,834
World Rank
723
Country Rank
6
University
Ranking Based On Selection:
13
Engineering & Technology / Energy Engineering
Energy Storage Materials | Carbon | Supercapacitor | Batter
Energy Storage Materials | Carbon | Supercapacitor | Batter
H-Index Metrics
-
H-Index91
-
i10 Index264
-
Citation Counts29,703
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* Total H Index Rankings
Rankings
14,856
World Rank
731
Country Rank
16
University
Ranking Based On Selection:
14
* Total H Index Rankings
Rankings
14,941
World Rank
748
Country Rank
8
University
Ranking Based On Selection:
15
Engineering & Technology / Energy Engineering
Solar Energy | Catalysis | Photovoltaic | Functional Material
Solar Energy | Catalysis | Photovoltaic | Functional Material
H-Index Metrics
-
H-Index91
-
i10 Index254
-
Citation Counts37,048
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* Total H Index Rankings
Rankings
15,424
World Rank
762
Country Rank
62
University
Ranking Based On Selection:
16
* Total H Index Rankings
Rankings
21,383
World Rank
1,101
Country Rank
3
University
Ranking Based On Selection:
17
* Total H Index Rankings
Rankings
21,384
World Rank
1,102
Country Rank
80
University
Ranking Based On Selection:
18
Engineering & Technology / Energy Engineering
Power system planning | Low carbon | Multi-energy systems | Energy Interne
Power system planning | Low carbon | Multi-energy systems | Energy Interne
H-Index Metrics
-
H-Index82
-
i10 Index286
-
Citation Counts22,237
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* Total H Index Rankings
Rankings
22,338
World Rank
1,163
Country Rank
18
University
Ranking Based On Selection:
19
Engineering & Technology / Energy Engineering
Flue gas cleaning | Renewable energy | Waste managemen
Flue gas cleaning | Renewable energy | Waste managemen
H-Index Metrics
-
H-Index81
-
i10 Index212
-
Citation Counts18,819
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* Total H Index Rankings
Rankings
23,353
World Rank
1,230
Country Rank
19
University
Ranking Based On Selection:
20
Engineering & Technology / Energy Engineering
Solar energy conversion | Photocatalysis | Water splitting | Nanostructured material
Solar energy conversion | Photocatalysis | Water splitting | Nanostructured material
H-Index Metrics
-
H-Index80
-
i10 Index217
-
Citation Counts30,140
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* Total H Index Rankings
Rankings
24,278
World Rank
1,272
Country Rank
14
University
Ranking Based On Selection:
21
Engineering & Technology / Energy Engineering
Perovskite solar cells/Perovskite LEDs/photodetectors | Quantum-dots LEDs | Organic solar cells | OLEDs | flexible electronic
Perovskite solar cells/Perovskite LEDs/photodetectors | Quantum-dots LEDs | Organic solar cells | OLEDs | flexible electronic
H-Index Metrics
-
H-Index79
-
i10 Index166
-
Citation Counts22,670
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* Total H Index Rankings
Rankings
25,376
World Rank
1,344
Country Rank
15
University
Ranking Based On Selection:
22
Engineering & Technology / Energy Engineering
Solar energy conversion | Photoelectrocatalysis | Electrocatalysi
Solar energy conversion | Photoelectrocatalysis | Electrocatalysi
H-Index Metrics
-
H-Index78
-
i10 Index155
-
Citation Counts32,392
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* Total H Index Rankings
Rankings
27,408
World Rank
1,434
Country Rank
37
University
Ranking Based On Selection:
23
Engineering & Technology / Energy Engineering
radiation detectors | perovskite semiconductors | scintillator
radiation detectors | perovskite semiconductors | scintillator
H-Index Metrics
-
H-Index76
-
i10 Index137
-
Citation Counts25,292
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* Total H Index Rankings
Rankings
27,433
World Rank
1,441
Country Rank
21
University
Ranking Based On Selection:
24
* Total H Index Rankings
Rankings
27,502
World Rank
1,448
Country Rank
104
University
Ranking Based On Selection:
25
Engineering & Technology / Energy Engineering
Power System | Power Grid complexity | Compressed air energy storage | Game theor
Power System | Power Grid complexity | Compressed air energy storage | Game theor
H-Index Metrics
-
H-Index76
-
i10 Index431
-
Citation Counts23,399
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