World's Best Scientists 2026 revealed!

D-Index & Metrics

Materials Science

D-Index
62
Citations
14064
World Ranking
6460
National Ranking
1641

Robert W. Collins 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 Robert W. Collins sits on this spectrum.

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 publications 1,163+

This scientist: 513 publications — 87th percentile

87% of scientists in this discipline score the same or lower.

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

Robert W. Collins 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 Robert W. Collins sits on this spectrum.

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 D-Index 165+

This scientist: 62 D-Index — 51st percentile

51% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2013 - Fellow of American Physical Society (APS) Citation For advancing the understanding of the optical properties and structures of thin film materials and devices, for innovations in realtime spectroscopic ellipsometry, and for leadership of research collaborations of industrial, government, and university laboratories

Overview

Robert W. Collins is affiliated with the University of Toledo in the United States. Their research primarily intersects the fields of Engineering and Materials Science, with a focus on subfields including Materials Chemistry and Electrical and Electronic Engineering.

The scientist's work encompasses several main topics, notably:

  • Chalcogenide Semiconductor Thin Films
  • Quantum Dots Synthesis And Properties
  • Copper-based nanomaterials and applications
  • ZnO doping and properties
  • Acute Myeloid Leukemia Research
  • Phase-change materials and chalcogenides
  • Perovskite Materials and Applications

Robert W. Collins has contributed to multiple recent publications spanning various areas related to thin film materials and photovoltaics. Notable papers include:

  • "Enabling bifacial thin film devices by developing a back surface field using CuxAlOy", 2021, published in Nano Energy
  • "Zinc Oxide Nanoparticles-Solution-Based Synthesis and Characterizations", 2023, published in Nanomaterials
  • "Optical properties of thin film Sb2Se3 and identification of its electronic losses in photovoltaic devices", 2021, published in Solar Energy
  • "Impact of lifetime on the levelized cost of electricity from perovskite single junction and tandem solar cells", 2022, published in Sustainable Energy & Fuels
  • "Reduced Recombination and Improved Performance of CdSe/CdTe Solar Cells due to Cu Migration Induced by Light Soaking", 2022, published in ACS Applied Materials & Interfaces

Frequent coauthors in their research collaborations have included:

  • Nikolas J. Podraza
  • Prakash Koirala
  • Michael J. Heben
  • Adam B. Phillips
  • Balaji Ramanujam

Their publications appear in various scholarly venues, including:

  • Materials
  • 2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)
  • Clinical Lymphoma Myeloma & Leukemia
  • Solar Energy Materials and Solar Cells
  • arXiv (Cornell University)

Robert W. Collins has also contributed to book publications, particularly with the publisher World Scientific, which includes multiple editions of "The World Scientific Reference of Amorphous Materials" published in 2020.

In recognition of their work, they received the award of Fellow of the American Physical Society in 2013, with the citation highlighting advances in understanding optical properties and structures of thin film materials and devices, innovations in realtime spectroscopic ellipsometry, and leadership in collaborative research efforts involving industrial, government, and university laboratories.

Best Publications

  • Analytical model for the optical functions of amorphous semiconductors from the near-infrared to ultraviolet: Applications in thin film photovoltaics

    A. S. Ferlauto;G. M. Ferreira;Joshua M. Pearce;C. R. Wronski

  • Optical band gap of BiFeO3 grown by molecular-beam epitaxy

    J. F. Ihlefeld;J. F. Ihlefeld;N. J. Podraza;Z. K. Liu;R. C. Rai

  • Evolution of microstructure and phase in amorphous, protocrystalline, and microcrystalline silicon studied by real time spectroscopic ellipsometry

    R.W. Collins;A.S. Ferlauto;G.M. Ferreira;Chi Chen

  • Pulsed laser deposition of diamond‐like carbon films

    David L. Pappas;Katherine L. Saenger;John Bruley;William Krakow

  • Assessment of effective-medium theories in the analysis of nucleation and microscopic surface roughness evolution for semiconductor thin films

    H. Fujiwara;Joohyun Koh;P. I. Rovira;R. W. Collins

  • Intrinsic stress in diamond films prepared by microwave plasma CVD

    H. Windischmann;Glenn F. Epps;Yue Cong;R. W. Collins

  • Linear and nonlinear optical properties of BiFeO3

    Amit Kumar;Ram C. Rai;Nikolas J. Podraza;Sava Denev

  • Optimization of hydrogenated amorphous silicon p–i–n solar cells with two-step i layers guided by real-time spectroscopic ellipsometry

    Joohyun Koh;Yeeheng Lee;H. Fujiwara;C. R. Wronski

  • Rotating-compensator multichannel ellipsometry: Applications for real time Stokes vector spectroscopy of thin film growth

    Joungchel Lee;P. I. Rovira;Ilsin An;R. W. Collins

  • EVOLUTIONARY PHASE DIAGRAMS FOR PLASMA-ENHANCED CHEMICAL VAPOR DEPOSITION OF SILICON THIN FILMS FROM HYDROGEN-DILUTED SILANE

    Joohyun Koh;A. S. Ferlauto;P. I. Rovira;C. R. Wronski

  • Dual rotating-compensator multichannel ellipsometer: instrument design for real-time Mueller matrix spectroscopy of surfaces and films

    R. W. Collins;Joohyun Koh

  • Chemical Effects of Methyl and Methyl Ester Groups on the Nucleation and Growth of Vapor-Deposited Aluminum Films

    A. Hooper;G. L. Fisher;K. Konstadinidis;D. Jung

  • The temperature dependence of photoluminescence in a-Si: H alloys

    R.W. Collins;M.A. Paesler;William Paul

  • Annealing-free efficient vacuum-deposited planar perovskite solar cells with evaporated fullerenes as electron-selective layers

    Dewei Zhao;Dewei Zhao;Weijun Ke;Corey R. Grice;Alexander J. Cimaroli

  • Correlation of real time spectroellipsometry and atomic force microscopy measurements of surface roughness on amorphous semiconductor thin films

    Joohyun Koh;Yiwei Lu;C. R. Wronski;Yalei Kuang

  • Oxygenated CdS Buffer Layers Enabling High Open-Circuit Voltages in Earth-Abundant Cu2BaSnS4 Thin-Film Solar Cells

    Jie Ge;Prakash Koirala;Corey R. Grice;Paul J. Roland

  • Evolution of the optical functions of thin-film aluminum: A real-time spectroscopic ellipsometry study

    Hien V. Nguyen;Ilsin An;R. W. Collins

  • Optical Properties of Solids

    Robert W. Collins;K. Vedam

  • Comprehensive comparison of various techniques for the analysis of elemental distributions in thin films.

    D. Abou-Ras;R. Caballero;C.-H. Fischer;C.A. Kaufmann

  • In situ ellipsometry of thin‐film deposition: Implications for amorphous and microcrystalline Si growth

    Unknown

  • Advances in multichannel spectroscopic ellipsometry

    R.W Collins;Ilsin An;H Fujiwara;Joungchel Lee

  • Advances in plasma-enhanced chemical vapor deposition of silicon films at low temperatures

    R.W. Collins;A.S. Ferlauto

  • Spectroscopic Ellipsometry for Photovoltaics

    Hiroyuki Fujiwara;Robert W. Collins

Frequent Co-Authors

Joshua M. Pearce
Joshua M. Pearce University of Western Ontario
Russell Messier
Russell Messier Pennsylvania State University
Angus Rockett
Angus Rockett Colorado School of Mines
Juan Antonio Zapien
Juan Antonio Zapien City University of Hong Kong
Michael J. Heben
Michael J. Heben University of Toledo
Yanfa Yan
Yanfa Yan University of Toledo
Randy J. Ellingson
Randy J. Ellingson University of Toledo
Mowafak Al-Jassim
Mowafak Al-Jassim National Renewable Energy Laboratory
Kim M. Jones
Kim M. Jones National Renewable Energy Laboratory
Elizabeth C. Dickey
Elizabeth C. Dickey Carnegie Mellon University

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