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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Materials Science 51 9829 9490 2370 2199 316 10707

Ramon Collazo publications per year

The chart shows the history of publications by Ramon Collazo between 1997 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ramon Collazo published across 30 years, from 1997 to 2026, averaging 11.4 papers a year. Output peaked at 29 publications in 2018. 12 of the 341 publications appeared in the last two years.

No. of publications
5 10 15 20 25
Bar chart. Horizontal axis: year, 1997 to 2026. Vertical axis: number of publications, 0 to 29. Peak 29 publications in 2018. 1997: 1 publication 1998: 1 publication 1999: 0 publications 2000: 2 publications 2001: 4 publications 2002: 5 publications 2003: 4 publications 2004: 4 publications 2005: 6 publications 2006: 9 publications 2007: 9 publications 2008: 12 publications 2009: 5 publications 2010: 10 publications 2011: 16 publications 2012: 10 publications 2013: 22 publications 2014: 21 publications 2015: 15 publications 2016: 26 publications 2017: 22 publications 2018: 29 publications 2019: 13 publications 2020: 22 publications 2021: 21 publications 2022: 23 publications 2023: 13 publications 2024: 4 publications 2025: 10 publications 2026: 2 publications
1997 2026

341 publications in total across all disciplines

View publications per year as a table
Ramon Collazo: publications per year, 1997 to 2026
Year Publications
1997 1
1998 1
1999 0
2000 2
2001 4
2002 5
2003 4
2004 4
2005 6
2006 9
2007 9
2008 12
2009 5
2010 10
2011 16
2012 10
2013 22
2014 21
2015 15
2016 26
2017 22
2018 29
2019 13
2020 22
2021 21
2022 23
2023 13
2024 4
2025 10
2026 2
Total 341
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Ramon Collazo publications per year - data summary

  • Ramon Collazo, a Materials Science scholar from North Carolina State University, has 341 publications recorded across 30 years, from 1997 to 2026.
  • The oldest publication on record dates to 1997 and the most recent to 2026.
  • The most productive year is 2018, with 29 publications.
  • The least productive years with any output are 1997 and 1998, with 1 publication each.
  • 1 of the 30 years in the span carries no publications at all (1999).
  • The rate of publication averages 11.4 papers per year over the whole span, or 11.8 per year counting only the 29 years with at least one publication.
  • The last 5 years on the chart (2022-2026) hold 52 publications, 15% of the career total.
  • Split into equal eras - 1997-2006: 36 publications (3.6 per year); 2007-2016: 146 publications (14.6 per year); 2017-2026: 159 publications (15.9 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Ramon Collazo publication distribution in Materials Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Materials Science in 2026. The highlighted bar marks where Ramon Collazo sits on this spectrum.

No. of scientists
200 400 600 800
Bar chart with 57 bars. Horizontal axis: publications, 50–69 to 1,163+. Vertical axis: number of scientists, 0 to 891. Most scientists, 891, have 190–209 publications. The last bar groups every scientist with 1,163 publications or more. The highlighted bar, 310–329 publications, is where this scientist sits. 50–69 publications: 28 scientists 70–89 publications: 152 scientists 90–109 publications: 356 scientists 110–129 publications: 487 scientists 130–149 publications: 723 scientists 150–169 publications: 835 scientists 170–189 publications: 850 scientists 190–209 publications: 891 scientists 210–229 publications: 862 scientists 230–249 publications: 766 scientists 250–269 publications: 726 scientists 270–289 publications: 665 scientists 290–309 publications: 593 scientists 310–329 publications: 537 scientists 330–349 publications: 477 scientists 350–369 publications: 440 scientists 370–389 publications: 356 scientists 390–409 publications: 321 scientists 410–429 publications: 256 scientists 430–449 publications: 246 scientists 450–469 publications: 216 scientists 470–489 publications: 212 scientists 490–509 publications: 174 scientists 510–529 publications: 194 scientists 530–549 publications: 162 scientists 550–569 publications: 131 scientists 570–589 publications: 111 scientists 590–609 publications: 103 scientists 610–629 publications: 99 scientists 630–649 publications: 77 scientists 650–669 publications: 92 scientists 670–689 publications: 56 scientists 690–709 publications: 53 scientists 710–729 publications: 53 scientists 730–749 publications: 38 scientists 750–769 publications: 52 scientists 770–789 publications: 43 scientists 790–809 publications: 38 scientists 810–829 publications: 34 scientists 830–849 publications: 25 scientists 850–869 publications: 18 scientists 870–889 publications: 20 scientists 890–909 publications: 24 scientists 910–929 publications: 27 scientists 930–949 publications: 20 scientists 950–969 publications: 17 scientists 970–989 publications: 10 scientists 990–1,009 publications: 16 scientists 1,010–1,029 publications: 13 scientists 1,030–1,049 publications: 12 scientists 1,050–1,069 publications: 9 scientists 1,070–1,089 publications: 8 scientists 1,090–1,109 publications: 7 scientists 1,110–1,129 publications: 9 scientists 1,130–1,149 publications: 2 scientists 1,150–1,162 publications: 5 scientists 1,163+ publications: 100 scientists
50–69 publications 1,163+

This scientist: 316 publications — 63rd percentile

63% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,163 publications or more.

View publications distribution as a table
Number of Materials Science scientists by publication count, Research.com 2026 ranking edition. Based on 12,847 ranked scientists.
Publications Scientists This scientist
50–69 28
70–89 152
90–109 356
110–129 487
130–149 723
150–169 835
170–189 850
190–209 891
210–229 862
230–249 766
250–269 726
270–289 665
290–309 593
310–329 537 316
330–349 477
350–369 440
370–389 356
390–409 321
410–429 256
430–449 246
450–469 216
470–489 212
490–509 174
510–529 194
530–549 162
550–569 131
570–589 111
590–609 103
610–629 99
630–649 77
650–669 92
670–689 56
690–709 53
710–729 53
730–749 38
750–769 52
770–789 43
790–809 38
810–829 34
830–849 25
850–869 18
870–889 20
890–909 24
910–929 27
930–949 20
950–969 17
970–989 10
990–1,009 16
1,010–1,029 13
1,030–1,049 12
1,050–1,069 9
1,070–1,089 8
1,090–1,109 7
1,110–1,129 9
1,130–1,149 2
1,150–1,162 5
1,163+ 100
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Ramon Collazo publication distribution in Materials Science in 2026 - data summary

  • The chart plots the publication count of all 12,847 Materials Science scientists ranked by Research.com in 2026, grouped into 57 ranges running from 50–69 to 1,163+ publications.
  • Ramon Collazo, a Materials Science scholar from North Carolina State University, records 316 publications - the 63rd percentile of the discipline.
  • 63% of ranked Materials Science scientists score the same or lower than Ramon Collazo, and about 37% score higher.
  • The median of the discipline falls in the 250–269 publications range, and Ramon Collazo ranks above the median.
  • The most crowded range is 190–209 publications, holding 891 scientists (7% of the field).
  • 70% of the field sits in the lowest quarter of the value range (up to 330–349 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 1,163 publications or more, 100 scientists in all (<1% of the field).

Ramon Collazo D-index placement in Materials Science in 2026

The chart shows the D-index (discipline H-index) distribution of Materials Science scientists ranked by Research.com in 2026. The highlighted bar marks where Ramon Collazo sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 64 bars. Horizontal axis: D-Index, 40–41 to 165+. Vertical axis: number of scientists, 0 to 667. Most scientists, 667, have 52–53 D-Index. The last bar groups every scientist with 165 D-Index or more. The highlighted bar, 50–51 D-Index, is where this scientist sits. 40–41 D-Index: 211 scientists 42–43 D-Index: 450 scientists 44–45 D-Index: 612 scientists 46–47 D-Index: 612 scientists 48–49 D-Index: 598 scientists 50–51 D-Index: 657 scientists 52–53 D-Index: 667 scientists 54–55 D-Index: 621 scientists 56–57 D-Index: 597 scientists 58–59 D-Index: 610 scientists 60–61 D-Index: 587 scientists 62–63 D-Index: 606 scientists 64–65 D-Index: 533 scientists 66–67 D-Index: 490 scientists 68–69 D-Index: 469 scientists 70–71 D-Index: 378 scientists 72–73 D-Index: 421 scientists 74–75 D-Index: 359 scientists 76–77 D-Index: 323 scientists 78–79 D-Index: 299 scientists 80–81 D-Index: 230 scientists 82–83 D-Index: 210 scientists 84–85 D-Index: 195 scientists 86–87 D-Index: 203 scientists 88–89 D-Index: 175 scientists 90–91 D-Index: 175 scientists 92–93 D-Index: 142 scientists 94–95 D-Index: 121 scientists 96–97 D-Index: 117 scientists 98–99 D-Index: 107 scientists 100–101 D-Index: 88 scientists 102–103 D-Index: 85 scientists 104–105 D-Index: 68 scientists 106–107 D-Index: 62 scientists 108–109 D-Index: 57 scientists 110–111 D-Index: 45 scientists 112–113 D-Index: 49 scientists 114–115 D-Index: 50 scientists 116–117 D-Index: 34 scientists 118–119 D-Index: 38 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 29 scientists 124–125 D-Index: 28 scientists 126–127 D-Index: 24 scientists 128–129 D-Index: 33 scientists 130–131 D-Index: 28 scientists 132–133 D-Index: 21 scientists 134–135 D-Index: 20 scientists 136–137 D-Index: 23 scientists 138–139 D-Index: 17 scientists 140–141 D-Index: 12 scientists 142–143 D-Index: 17 scientists 144–145 D-Index: 21 scientists 146–147 D-Index: 13 scientists 148–149 D-Index: 11 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 13 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 4 scientists 162–163 D-Index: 4 scientists 164 D-Index: 3 scientists 165+ D-Index: 98 scientists
40–41 D-Index 165+

This scientist: 51 D-Index — 24th percentile

24% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 165 D-Index or more.

View D-Index distribution as a table
Number of Materials Science scientists by D-index, Research.com 2026 ranking edition. Based on 12,847 ranked scientists.
D-Index Scientists This scientist
40–41 211
42–43 450
44–45 612
46–47 612
48–49 598
50–51 657 51
52–53 667
54–55 621
56–57 597
58–59 610
60–61 587
62–63 606
64–65 533
66–67 490
68–69 469
70–71 378
72–73 421
74–75 359
76–77 323
78–79 299
80–81 230
82–83 210
84–85 195
86–87 203
88–89 175
90–91 175
92–93 142
94–95 121
96–97 117
98–99 107
100–101 88
102–103 85
104–105 68
106–107 62
108–109 57
110–111 45
112–113 49
114–115 50
116–117 34
118–119 38
120–121 37
122–123 29
124–125 28
126–127 24
128–129 33
130–131 28
132–133 21
134–135 20
136–137 23
138–139 17
140–141 12
142–143 17
144–145 21
146–147 13
148–149 11
150–151 14
152–153 13
154–155 9
156–157 10
158–159 7
160–161 4
162–163 4
164 3
165+ 98
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Ramon Collazo D-index placement in Materials Science in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 12,847 Materials Science scientists ranked by Research.com in 2026, grouped into 64 ranges running from 40–41 to 165+ D-Index.
  • Ramon Collazo, a Materials Science scholar from North Carolina State University, records 51 D-Index - the 24th percentile of the discipline.
  • 24% of ranked Materials Science scientists score the same or lower than Ramon Collazo, and about 76% score higher.
  • The median of the discipline falls in the 62–63 D-Index range, and Ramon Collazo ranks below the median.
  • The most crowded range is 52–53 D-Index, holding 667 scientists (5% of the field).
  • 68% of the field sits in the lowest quarter of the value range (up to 70–71 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 165 D-Index or more, 98 scientists in all (<1% of the field).

Overview

Ramon Collazo is affiliated with North Carolina State University in the United States. Their research spans multiple disciplines including Engineering, Physics and Astronomy, and Materials Science, with a significant number of publications in these fields emphasizing semiconductor materials and devices.

Their work includes a strong focus on subfields such as Condensed Matter Physics, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Materials Chemistry, and Mechanics of Materials. This multidisciplinary approach supports research on advanced semiconductor technologies and material properties.

Main topics addressed in Collazo's research are:

  • GaN-based semiconductor devices and materials
  • Ga2O3 and related materials
  • Semiconductor materials and devices
  • Metal and Thin Film Mechanics
  • ZnO doping and properties
  • Silicon Carbide Semiconductor Technologies
  • Acoustic Wave Resonator Technologies

Frequent publication venues for their work include:

  • Applied Physics Letters
  • Journal of Applied Physics
  • Applied Physics Express
  • physica status solidi (a)
  • Semiconductor Science and Technology

Notable recent papers authored or coauthored by Collazo include:

  • The 2020 UV emitter roadmap, 2020, Journal of Physics D Applied Physics
  • High Mg activation in implanted GaN by high temperature and ultrahigh pressure annealing, 2021, Applied Physics Letters
  • High gain, large area, and solar blind avalanche photodiodes based on Al-rich AlGaN grown on AlN substrates, 2020, Applied Physics Letters
  • The role of chemical potential in compensation control in Si:AlGaN, 2020, Journal of Applied Physics
  • High electron mobility in AlN:Si by point and extended defect management, 2022, Journal of Applied Physics

Ramon Collazo collaborates frequently with researchers such as Zlatko Sitar, Pramod Reddy, Ronny Kirste, Seiji Mita, and Dolar Khachariya. These collaborations focus on semiconductor research and material science, contributing to a significant body of work in electronic and optical materials.

Best Publications

  • Ultrawide-Bandgap Semiconductors: Research Opportunities and Challenges

    J. Y. Tsao;S. Chowdhury;M. A. Hollis;D. Jena

  • The 2020 UV emitter roadmap

    Hiroshi Amano;Ramón Collazo;Carlo De Santi;Sven Einfeldt

  • Progress on n‐type doping of AlGaN alloys on AlN single crystal substrates for UV optoelectronic applications

    Ramón Collazo;Seiji Mita;Jinqiao Xie;Anthony Rice

  • On the origin of the 265 nm absorption band in AlN bulk crystals

    Ramón Collazo;Jinqiao Xie;Benjamin E. Gaddy;Zachary Bryan

  • Growth and Characterization of AlN and AlGaN Epitaxial Films on AlN Single Crystal Substrates

    R. Dalmau;B. Moody;R. Schlesser;S. Mita

  • High internal quantum efficiency in AlGaN multiple quantum wells grown on bulk AlN substrates

    Zachary Bryan;Isaac Bryan;Jinqiao Xie;Seiji Mita

  • Surface kinetics in AlN growth: A universal model for the control of surface morphology in III-nitrides

    Isaac Bryan;Zachary Bryan;Seiji Mita;Anthony Rice

  • Seeded growth of AlN bulk crystals in m- and c-orientation

    P. Lu;R. Collazo;R.F. Dalmau;G. Durkaya

  • Surface preparation and homoepitaxial deposition of AlN on (0001)-oriented AlN substrates by metalorganic chemical vapor deposition

    A. Rice;R. Collazo;J. Tweedie;R. Dalmau

  • Influence of gallium supersaturation on the properties of GaN grown by metalorganic chemical vapor deposition

    S. Mita;R. Collazo;A. Rice;R. F. Dalmau

  • On compensation in Si-doped AlN

    Joshua S. Harris;Jonathon N. Baker;Benjamin E. Gaddy;Isaac Bryan

  • The role of surface kinetics on composition and quality of AlGaN

    Isaac Bryan;Zachary Bryan;Seiji Mita;Anthony Rice

  • Doping and compensation in Al-rich AlGaN grown on single crystal AlN and sapphire by MOCVD

    Isaac Bryan;Zachary Bryan;Shun Washiyama;Pramod Reddy

  • Lasing and Longitudinal Cavity Modes in Photo-Pumped Deep Ultraviolet AlGaN Heterostructures

    Jinqiao Xie;Seiji Mita;Zachary Bryan;Wei Guo

  • Polarity Control in Group-III Nitrides beyond Pragmatism

    Stefan Mohn;Natalia Stolyarchuk;Natalia Stolyarchuk;Toni Markurt;Ronny Kirste

  • Seeded growth of AlN on N- and Al-polar AlN seeds by physical vapor transport

    Z.G. Herro;D. Zhuang;R. Schlesser;R. Collazo

  • Vacancy compensation and related donor-acceptor pair recombination in bulk AlN

    Benjamin E. Gaddy;Zachary Bryan;Isaac Bryan;Ronny Kirste

  • Growth of Ga- and N- polar gallium nitride layers by metalorganic vapor phase epitaxy on sapphire wafers

    R. Collazo;S. Mita;A. Aleksov;R. Schlesser

  • Electronic Biosensors Based on III-Nitride Semiconductors.

    Ronny Kirste;Nathaniel Rohrbaugh;Isaac Bryan;Zachary Bryan

  • Comparative study of etching high crystalline quality AlN and GaN

    W. Guo;J. Xie;C. Akouala;S. Mita

  • Atomically Thin MoS2 Narrowband and Broadband Light Superabsorbers.

    Lujun Huang;Guoqing Li;Alper Gurarslan;Yiling Yu

  • Correlation between mobility collapse and carbon impurities in Si-doped GaN grown by low pressure metalorganic chemical vapor deposition

    Felix Kaess;Seiji Mita;Jingqiao Xie;Pramod Reddy

Frequent Co-Authors

Zlatko Sitar
Zlatko Sitar North Carolina State University
Jon-Paul Maria
Jon-Paul Maria Pennsylvania State University
Axel Hoffmann
Axel Hoffmann University of Illinois at Urbana-Champaign
Yoshinao Kumagai
Yoshinao Kumagai Tokyo University of Agriculture and Technology
Michal Bockowski
Michal Bockowski Polish Academy of Sciences
Klaus Thonke
Klaus Thonke University of Ulm
Bo Monemar
Bo Monemar Linköping University
Robert F. Davis
Robert F. Davis Carnegie Mellon University
Shigefusa F. Chichibu
Shigefusa F. Chichibu Tohoku University
Gerd Duscher
Gerd Duscher University of Tennessee at Knoxville

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