University, Subject, Country, Region, World
University of the Free State 14 Scientists Subject Rankings - 2025
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 197 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 Jan 31, 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 (870.053) 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
nanophosphors
luminescence
cathodoluminescence
surface characterization
Metrics
H-Index
i10 Index
Citation Counts
73
627
27,167
* Total H IndexRankings
Ranking Based On Selection: 2
Physics
Astrophysics
Metrics
H-Index
i10 Index
Citation Counts
52
142
14,834
* Total H IndexRankings
Ranking Based On Selection: 3
Condensed Matter Physics
Renewable Energy
Metrics
H-Index
i10 Index
Citation Counts
32
111
3,513
* Total H IndexRankings
Ranking Based On Selection: 4
Physics
Semiconductors
Phosphors
Solar Cells
Metrics
H-Index
i10 Index
Citation Counts
29
93
2,902
* Total H IndexRankings
Ranking Based On Selection: 5
Solid state Physics
Metrics
H-Index
i10 Index
Citation Counts
23
40
1,403
* Total H IndexRankings
Ranking Based On Selection: 6
Physics
Metrics
H-Index
i10 Index
Citation Counts
19
27
1,324
* Total H IndexRankings
Ranking Based On Selection: 7
Nanoscience and Nanotechnology
Metrics
H-Index
i10 Index
Citation Counts
16
22
851
* Total H IndexRankings
Ranking Based On Selection: 8
Luminescence
Material Science
Solid State Physics
Metrics
H-Index
i10 Index
Citation Counts
14
20
461
* Total H IndexRankings
Ranking Based On Selection: 9
Luminescencet Materials
Upconversion Nanophosphors
Solid state lighting
Crystallography
Solar Cell Technology
Metrics
H-Index
i10 Index
Citation Counts
13
18
752
* Total H IndexRankings
Ranking Based On Selection: 10
Experimental Condensed matter physics
Luminescent Materials
optoelectronics
Metrics
H-Index
i10 Index
Citation Counts
11
13
392
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* Total H IndexRankings
Ranking Based On Selection: 11
Physics. phosphors
luminescence
solar cells
light emitting diodes
Metrics
H-Index
i10 Index
Citation Counts
8
6
266
* Total H IndexRankings
Ranking Based On Selection: 12
Agriculture
Soil Physics
Watershed Management
Environment
Metrics
H-Index
i10 Index
Citation Counts
7
6
287
* Total H IndexRankings
Ranking Based On Selection: 13
Multiwavelength Astrophysics
Instrumentation
Occultations
Digital Planetariums
Robotic Telescopes
Metrics
H-Index
i10 Index
Citation Counts
6
3
149
* Total H IndexRankings
Ranking Based On Selection: 14
Science education for sustainability
Metrics
H-Index
i10 Index
Citation Counts
4
3
56
HC Swart
University of the Free State
Bloemfontein, South Africa
Metrics
H-Index
i10-Index
Citation Counts
73
627
27,167
nanophosphors
luminescence
cathodoluminescence
surface characterization
Petrus Johannes Meintjes
University of the Free State
Bloemfontein, South Africa
Metrics
H-Index
i10-Index
Citation Counts
52
142
14,834
Francis Birhanu Dejene
University of the Free State
Bloemfontein, South Africa
Metrics
H-Index
i10-Index
Citation Counts
32
111
3,513
Elizabeth Coetsee
University of the Free State
Bloemfontein, South Africa
Metrics
H-Index
i10-Index
Citation Counts
29
93
2,902
Physics
Semiconductors
Phosphors
Solar Cells
Lehlohonolo Koao
University of the Free State
Bloemfontein, South Africa
Metrics
H-Index
i10-Index
Citation Counts
23
40
1,403
Mart-Mari Duvenhage
University of the Free State
Bloemfontein, South Africa
Metrics
H-Index
i10-Index
Citation Counts
19
27
1,324
Ro Ocaya|Richard Opio Ocaya
University of the Free State
Bloemfontein, South Africa
Metrics
H-Index
i10-Index
Citation Counts
16
22
851
Sumedha Tamboli
University of the Free State
Bloemfontein, South Africa
Metrics
H-Index
i10-Index
Citation Counts
14
20
461
Luminescence
Material Science
Solid State Physics
Ashwini Kumar Sharma
University of the Free State
Bloemfontein, South Africa
Metrics
H-Index
i10-Index
Citation Counts
13
18
752
Luminescencet Materials
Upconversion Nanophosphors
Solid state lighting
Crystallography
Solar Cell Technology
Mubarak Yagoub
University of the Free State
Bloemfontein, South Africa
Metrics
H-Index
i10-Index
Citation Counts
11
13
392
Experimental Condensed matter physics
Luminescent Materials
optoelectronics
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Ljb Erasmus
University of the Free State
Bloemfontein, South Africa
Metrics
H-Index
i10-Index
Citation Counts
8
6
266
Physics. phosphors
luminescence
solar cells
light emitting diodes
Achamyeleh G. Mengistu
University of the Free State
Bloemfontein, South Africa
Metrics
H-Index
i10-Index
Citation Counts
7
6
287
Agriculture
Soil Physics
Watershed Management
Environment
Hendrik Jacobus Van Heerden
University of the Free State
Bloemfontein, South Africa
Metrics
H-Index
i10-Index
Citation Counts
6
3
149
Multiwavelength Astrophysics
Instrumentation
Occultations
Digital Planetariums
Robotic Telescopes
Moeketsi Freddie Tlali
University of the Free State
Bloemfontein, South Africa
Metrics
H-Index
i10-Index
Citation Counts
4
3
56