Productivity Rankings is a unique service offered only by “AD Scientific Index”. This is a ranking system derived from the i10 index in order to show the productivity of the scientist in publishing scientific articles of value. Productivity Rankings is an instrument that lists productive scientists in a given area, discipline, university, and country and can guide the development of meaningful incentives and academic policies. The world rankings, regional rankings, and university rankings of scientists in this table are developed based on the total i10 index. Additionally, click to view the special rankings based on Productivity Rankings: Scientists Last 6 years' i10 Index", Universities Total i10 Index Rankings 2025, Universities Last 6 Years i10 Index Rankings 2025 "Art and Humanities i10 Productivity Rankings" and "Social Sciences and Humanities i10 Productivity Rankings".
* Total i10 IndexRankings
Ranking Based On Selection :1
photovoltaics
nanomaterials
nanophotonics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
269
90
0.335
* Total i10 IndexRankings
Ranking Based On Selection :2
Renewable Energy
Active Distribution Networks
Poverty Alleviation by Just Microgrids
CO2 & H2O
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
148
61
0.412
* Total i10 IndexRankings
Ranking Based On Selection :3
Process Synthesis
Fischer Tropsch
Waste to Energy
Column Profile Maps
Attainable Regions
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
145
82
0.566
* Total i10 IndexRankings
Ranking Based On Selection :4
Perovskite solar cell
Organic solar cell
DSSC
Gas Sensors
Materials for Energy
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
112
101
0.902
* Total i10 IndexRankings
Ranking Based On Selection :5
Materials Sciences
Process Control
H2 & FC technologies
ALD technologies
System integration
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
98
93
0.949
* Total i10 IndexRankings
Ranking Based On Selection :6
Energy
Efficiency of Operations
Metabolism
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
86
30
0.349
* Total i10 IndexRankings
Ranking Based On Selection :7
Energy
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
77
41
0.532
* Total i10 IndexRankings
Ranking Based On Selection :8
Renewable Energy
Solid State Lighting
Nanoscience
Physics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
57
48
0.842
* Total i10 IndexRankings
Ranking Based On Selection :9
Energy
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
52
40
0.769
* Total i10 IndexRankings
Ranking Based On Selection :10
Energy
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
51
40
0.784
* Total i10 IndexRankings
Ranking Based On Selection :11
Energy storage
Supercapacitor
Nanotechnology
Energy efficiency
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
41
37
0.902
* Total i10 IndexRankings
Ranking Based On Selection :12
BioEnergy
Renewables
Thermodynamics
Bioprocess
BioMaterials
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
37
32
0.865
* Total i10 IndexRankings
Ranking Based On Selection :13
Global environmental change
ecosystem services
Geospatial information science
climate change
sustainable development
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
35
33
0.943
* Total i10 IndexRankings
Ranking Based On Selection :14
Biomass and bioenergy
renewable energy
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
34
29
0.853
* Total i10 IndexRankings
Ranking Based On Selection :15
Energy
Hydrogen
Coal
Waste
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
33
31
0.939
* Total i10 IndexRankings
Ranking Based On Selection :16
Bioenergy
Biofuel
Biorefinery
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
33
29
0.879
* Total i10 IndexRankings
Ranking Based On Selection :17
Noise
Vibration & Renewable Energy
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
28
13
0.464
* Total i10 IndexRankings
Ranking Based On Selection :18
Energy management
Power System
optimal Control
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
27
23
0.852
* Total i10 IndexRankings
Ranking Based On Selection :19
Sustainable Energy and porous materials
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
27
20
0.741
* Total i10 IndexRankings
Ranking Based On Selection :20
Circular Economy Heterogeneous Catalysis Renewable Energy
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
27
20
0.741
* Total i10 IndexRankings
Ranking Based On Selection :21
Energy-Fuel cells
Sensors
Green chemistry
nanomaterials
Battery materials and recycling
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
26
21
0.808
* Total i10 IndexRankings
Ranking Based On Selection :22
Energy efficiency and management
mining systems energy efficiency
optimal control
Power systems
Renewable and sustainable en
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
25
23
0.920
* Total i10 IndexRankings
Ranking Based On Selection :23
Energy management
Operational efficiency
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
25
11
0.440
* Total i10 IndexRankings
Ranking Based On Selection :24
Renewable energy
hybrid energy systems
energy management
energy optimization
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
24
21
0.875
* Total i10 IndexRankings
Ranking Based On Selection :25
Renewable energy (biomass gasification
biogas digester)
food processing
biofuel
water and wastewater treatment
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
23
22
0.957
Ruud Schropp
University of the Western Cape
Bellville, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
269
90
0.335
photovoltaics
nanomaterials
nanophotonics
SP Daniel Chowdhury
Tshwane University of Technology
Pretoria, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
148
61
0.412
Renewable Energy
Active Distribution Networks
Poverty Alleviation by Just Microgrids
CO2 & H2O
Diane Hildebrandt
University of South Africa
Pretoria, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
145
82
0.566
Process Synthesis
Fischer Tropsch
Waste to Energy
Column Profile Maps
Attainable Regions
Vinod Kumar
University of the Free State
Bloemfontein, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
112
101
0.902
Perovskite solar cell
Organic solar cell
DSSC
Gas Sensors
Materials for Energy
Jianwei Ren
University of Johannesburg
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
98
93
0.949
Materials Sciences
Process Control
H2 & FC technologies
ALD technologies
System integration
Edward Mathews
North West University
Potchefstroom, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
86
30
0.349
Energy
Efficiency of Operations
Metabolism
Anton Eberhard
University of Cape Town
Cape Town, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
77
41
0.532
Bakang Moses Mothudi
University of South Africa
Pretoria, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
57
48
0.842
Renewable Energy
Solid State Lighting
Nanoscience
Physics
Mmantsae Diale
University of Pretoria
Pretoria, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
52
40
0.769
Freddie Inambao
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
51
40
0.784
Farshad Barzegar
University of Pretoria
Pretoria, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
41
37
0.902
Energy storage
Supercapacitor
Nanotechnology
Energy efficiency
AC Eloka-Eboka
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
37
32
0.865
BioEnergy
Renewables
Thermodynamics
Bioprocess
BioMaterials
Walter Musakwa
University of Johannesburg
Johannesburg, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
35
33
0.943
Global environmental change
ecosystem services
Geospatial information science
climate change
sustainable development
Ntshengedzeni Sampson Mamphweli
Stellenbosch University
Stellenbosch, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
34
29
0.853
Biomass and bioenergy
renewable energy
BC North
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
33
31
0.939
Energy
Hydrogen
Coal
Waste
Mohsen A Mandegari
Stellenbosch University
Stellenbosch, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
33
29
0.879
Bioenergy
Biofuel
Biorefinery
Johannes L Van Niekerk
Stellenbosch University
Stellenbosch, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
28
13
0.464
Noise
Vibration & Renewable Energy
Mukwanga Willy Siti
Tshwane University of Technology
Pretoria, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
27
23
0.852
Energy management
Power System
optimal Control
Yusuf Isa Makarfi
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
27
20
0.741
Sustainable Energy and porous materials
Linda Zikhona Linganiso
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
27
20
0.741
Circular Economy Heterogeneous Catalysis Renewable Energy
Xolile Fuku
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
26
21
0.808
Energy-Fuel cells
Sensors
Green chemistry
nanomaterials
Battery materials and recycling
BP Numbi Eng
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
25
23
0.920
Energy efficiency and management
mining systems energy efficiency
optimal control
Power systems
Renewable and sustainable en
JF Van Rensburg
North West University
Potchefstroom, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
25
11
0.440
Energy management
Operational efficiency
Henerica Tazvinga
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
24
21
0.875
Renewable energy
hybrid energy systems
energy management
energy optimization
Engr. Kechrist Obileke
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
23
22
0.957
Renewable energy (biomass gasification
biogas digester)
food processing
biofuel
water and wastewater treatment