Subject Rankings
Japan Engineering & Technology / Energy Engineering Subject Rankings 2025
AD Scientific Index (Alper-Doger Scientific Index) offers the broadest spectrum of branches, providing analysis in 13 main fields and 197 sub-branches at global, national, and regional levels. These analyses can be based on indicators such as the H-index, i10-index, and citation count, as well as their values from the last 6 years. As of Nov 21, 2024, rankings are according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in beta. This is due to the exclusion of (873.864) scientists categorized under 'others,' whose profiles cannot yet be determined, edited, or classified. As these fields are updated, the rankings will adjust accordingly. Please keep this in mind. See Also: [University Subject Rankings]
* Total H IndexRankings
Ranking Based On Selection
:1
Energy-efficient micro-electronics design
Power electronics
Flexible electronics design
Metrics
H-Index
i10 Index
Citation Counts
83
409
34,362
* Total H IndexRankings
Ranking Based On Selection
:2
energy material
strongly correlated electron system
Metrics
H-Index
i10 Index
Citation Counts
73
280
28,390
* Total H IndexRankings
Ranking Based On Selection
:3
Energy Storage
Solid-State Chemistry
Battery
Metrics
H-Index
i10 Index
Citation Counts
67
116
34,081
* Total H IndexRankings
Ranking Based On Selection
:4
Battery
Fuel cells
Water electrolysis
Electrochemistry
solid state ionics
Metrics
H-Index
i10 Index
Citation Counts
63
299
17,957
* Total H IndexRankings
Ranking Based On Selection
:5
solar cells
Metrics
H-Index
i10 Index
Citation Counts
59
152
26,787
* Total H IndexRankings
Ranking Based On Selection
:6
Solar cell
Nanomaterial
Photovoltaics
Metrics
H-Index
i10 Index
Citation Counts
58
312
14,420
* Total H IndexRankings
Ranking Based On Selection
:7
Nexus
Sustainability
Energy
Minerals
Sustainable Design
Metrics
H-Index
i10 Index
Citation Counts
54
109
9,732
* Total H IndexRankings
Ranking Based On Selection
:8
Solar Cells
Crystal Growth
Defect Engineering
Materials and Process Informatics
Metrics
H-Index
i10 Index
Citation Counts
54
292
13,127
* Total H IndexRankings
Ranking Based On Selection
:9
Energy Systems
Heat Transfer
Hydrogen/Ammonia Production-Storage-Utilization
Carbon-Free System
Electric Vehicle Utilization
Metrics
H-Index
i10 Index
Citation Counts
53
188
9,726
* Total H IndexRankings
Ranking Based On Selection
:10
photocatalysis
solar energy conversion
energy storage
electrocatalysis
Metrics
H-Index
i10 Index
Citation Counts
52
110
26,369
* Total H IndexRankings
Ranking Based On Selection
:11
Solar cell
Compound semiconductor
Silicon
Device simulation
PV module-system-outdoor testing
Metrics
H-Index
i10 Index
Citation Counts
50
182
12,290
* Total H IndexRankings
Ranking Based On Selection
:12
solar cells
semiconductors
Cu(InGa)Se2
Si
Cu2ZnSnS4
Metrics
H-Index
i10 Index
Citation Counts
48
185
8,278
* Total H IndexRankings
Ranking Based On Selection
:13
Solar cells
Photovoltaics
Ellipsometry
Optical characterization
Metrics
H-Index
i10 Index
Citation Counts
44
105
11,768
* Total H IndexRankings
Ranking Based On Selection
:14
Chemistry
Metrics
H-Index
i10 Index
Citation Counts
43
94
6,710
* Total H IndexRankings
Ranking Based On Selection
:15
Organometallics
Catalysis
Carbon Dioxide
Coordination Chemistry
Metrics
H-Index
i10 Index
Citation Counts
43
89
6,863
* Total H IndexRankings
Ranking Based On Selection
:16
Energy
Energy Systems
Energy Management
Cogeneration
Optimization
Metrics
H-Index
i10 Index
Citation Counts
43
132
6,715
* Total H IndexRankings
Ranking Based On Selection
:17
Energy Policy
Environment
Catalysis
Materials
Quasicrystal
Metrics
H-Index
i10 Index
Citation Counts
43
129
5,991
* Total H IndexRankings
Ranking Based On Selection
:18
Solar Cell
Electrochemistry
Material Chemistry
Metrics
H-Index
i10 Index
Citation Counts
42
66
10,370
* Total H IndexRankings
Ranking Based On Selection
:19
Solar Cell
Compound semiconductor
Transparent conducting film
Thermoelectric material
Metrics
H-Index
i10 Index
Citation Counts
41
117
8,045
* Total H IndexRankings
Ranking Based On Selection
:20
Ceramics Engineering
Nanotechnology
Power Engineering
Environmental Engineering
Energy engineering
Metrics
H-Index
i10 Index
Citation Counts
36
128
4,807
* Total H IndexRankings
Ranking Based On Selection
:21
Energy conversion
Metrics
H-Index
i10 Index
Citation Counts
35
92
5,962
* Total H IndexRankings
Ranking Based On Selection
:22
energy
Metrics
H-Index
i10 Index
Citation Counts
35
99
4,789
* Total H IndexRankings
Ranking Based On Selection
:23
solar cells fuel cells carbon nanotube
Metrics
H-Index
i10 Index
Citation Counts
34
53
3,963
* Total H IndexRankings
Ranking Based On Selection
:24
Perovskite solar cells
Surface sciences
Crystalline materials
Energy materials and devices
Metrics
H-Index
i10 Index
Citation Counts
31
43
3,905
* Total H IndexRankings
Ranking Based On Selection
:25
solar cells
photodetectors
perovskite thin film
Li-battery
Metrics
H-Index
i10 Index
Citation Counts
31
39
3,446
Takayasu Sakurai
University of Tokyo
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
83
409
34,362
Energy-efficient micro-electronics design
Power electronics
Flexible electronics design
Yutaka Moritomo
University of Tsukuba
Tsukuba, Japan
Metrics
H-Index
i10-Index
Citation Counts
73
280
28,390
energy material
strongly correlated electron system
Naoaki Yabuuchi
Yokohama National University
Yokohama, Japan
Metrics
H-Index
i10-Index
Citation Counts
67
116
34,081
Energy Storage
Solid-State Chemistry
Battery
Yoshiharu Uchimoto
Kyoto University
Kyoto, Japan
Metrics
H-Index
i10-Index
Citation Counts
63
299
17,957
Battery
Fuel cells
Water electrolysis
Electrochemistry
solid state ionics
Tetsuo Soga
Nagoya Institute of Technology
Nagoya, Japan
Metrics
H-Index
i10-Index
Citation Counts
58
312
14,420
Solar cell
Nanomaterial
Photovoltaics
Nexus
Sustainability
Energy
Minerals
Sustainable Design
Noritaka Usami
Nagoya University
Nagoya, Japan
Metrics
H-Index
i10-Index
Citation Counts
54
292
13,127
Solar Cells
Crystal Growth
Defect Engineering
Materials and Process Informatics
Muhammad Aziz
University of Tokyo
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
53
188
9,726
Energy Systems
Heat Transfer
Hydrogen/Ammonia Production-Storage-Utilization
Carbon-Free System
Electric Vehicle Utilization
Takeshi Morikawa
Toyota Central R&D Labs., Inc
Toyota, Japan
Metrics
H-Index
i10-Index
Citation Counts
52
110
26,369
photocatalysis
solar energy conversion
energy storage
electrocatalysis
Takashi Minemoto
Ritsumeikan University
Kyoto, Japan
Metrics
H-Index
i10-Index
Citation Counts
50
182
12,290
Solar cell
Compound semiconductor
Silicon
Device simulation
PV module-system-outdoor testing
Yamada Akira
Metrics
H-Index
i10-Index
Citation Counts
48
185
8,278
solar cells
semiconductors
Cu(InGa)Se2
Si
Cu2ZnSnS4
Hiroyuki Fujiwara
Gifu University
Gifu, Japan
Metrics
H-Index
i10-Index
Citation Counts
44
105
11,768
Solar cells
Photovoltaics
Ellipsometry
Optical characterization
Tetsuaki Fujihara
Kyoto University
Kyoto, Japan
Metrics
H-Index
i10-Index
Citation Counts
43
89
6,863
Organometallics
Catalysis
Carbon Dioxide
Coordination Chemistry
Ryohei Yokoyama
Metrics
H-Index
i10-Index
Citation Counts
43
132
6,715
Energy
Energy Systems
Energy Management
Cogeneration
Optimization
Ishihara Keiichi N
Kyoto University
Kyoto, Japan
Metrics
H-Index
i10-Index
Citation Counts
43
129
5,991
Energy Policy
Environment
Catalysis
Materials
Quasicrystal
Satoshi Uchida
University of Tokyo
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
42
66
10,370
Solar Cell
Electrochemistry
Material Chemistry
Kenji Yoshino
University of Miyazaki
Miyazaki, Japan
Metrics
H-Index
i10-Index
Citation Counts
41
117
8,045
Solar Cell
Compound semiconductor
Transparent conducting film
Thermoelectric material
Tadachika Nakayama (中山 忠親)
Nagaoka University of Technology
Nagaoka, Japan
Metrics
H-Index
i10-Index
Citation Counts
36
128
4,807
Ceramics Engineering
Nanotechnology
Power Engineering
Environmental Engineering
Energy engineering
Masanobu Izaki
Toyohashi University of Technology
Toyohashi, Japan
Metrics
H-Index
i10-Index
Citation Counts
35
92
5,962
Satoru Okamoto
Shimane University
Matsue, Japan
Metrics
H-Index
i10-Index
Citation Counts
35
99
4,789
Keiko Waki
Metrics
H-Index
i10-Index
Citation Counts
34
53
3,963
solar cells fuel cells carbon nanotube
Tongle Bu
Metrics
H-Index
i10-Index
Citation Counts
31
43
3,905
Perovskite solar cells
Surface sciences
Crystalline materials
Energy materials and devices
Guoqing Tong
Metrics
H-Index
i10-Index
Citation Counts
31
39
3,446
solar cells
photodetectors
perovskite thin film
Li-battery