World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
62
Citations
12619
World Ranking
8903
National Ranking
2531

Chad Risko publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Chad Risko sits on this spectrum.

61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61 publications 1,295+

This scientist: 231 publications — 43rd percentile

43% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

Chad Risko D-index placement in Chemistry in 2026

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

40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40 D-Index 159+

This scientist: 62 D-Index — 52nd percentile

52% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

Overview

Chad Risko is affiliated with the University of Kentucky in the United States and conducts research primarily in the fields of Materials Science and Engineering. Their work focuses on several interrelated subfields, including Materials Chemistry, Electrical and Electronic Engineering, Polymers and Plastics, Organic Chemistry, and Electronic, Optical and Magnetic Materials.

The scientist's recent publications reflect a concentration on organic electronics and photovoltaics, X-ray diffraction in crystallography, crystallization and solubility studies, and conducting polymers and their applications. Their research further extends into machine learning applications in materials science, molecular junctions and nanostructures, as well as perovskite materials and related device applications.

Notable recent papers authored or co-authored by Chad Risko include:

  • Engineering ligand reactivity enables high-temperature operation of stable perovskite solar cells (2023, Science)
  • A molecular interaction-diffusion framework for predicting organic solar cell stability (2021, Nature Materials)
  • n-type charge transport in heavily p-doped polymers (2021, Nature Materials)
  • Suppressing bias stress degradation in high performance solution processed organic transistors operating in air (2021, Nature Communications)
  • Rational Functionalization of a C70 Buckybowl To Enable a C70:Buckybowl Cocrystal for Organic Semiconductor Applications (2020, Journal of the American Chemical Society)

Chad Risko frequently collaborates with a range of co-authors, with significant partnerships including:

  • Sean Parkin
  • Vinayak Bhat
  • Qianxiang Ai
  • John E. Anthony
  • K.R.P.M. Rao

Their work has appeared predominantly in journals and venues such as The Cambridge Structural Database, Chemistry of Materials, Journal of the American Chemical Society, Chemical Science, and ECS Meeting Abstracts.

Key topics covered in their research encompass:

  • Organic Electronics and Photovoltaics
  • X-ray Diffraction in Crystallography
  • Crystallization and Solubility Studies
  • Conducting polymers and applications
  • Machine Learning in Materials Science
  • Molecular Junctions and Nanostructures
  • Perovskite Materials and Applications

Best Publications

  • Design, synthesis, and characterization of ladder-type molecules and polymers. Air-stable, solution-processable n-channel and ambipolar semiconductors for thin-film transistors via experiment and theory.

    Hakan Usta;Chad Risko;Zhiming Wang;Hui Huang

  • Unification of trap-limited electron transport in semiconducting polymers

    H. T. Nicolai;M. Kuik;G. A. H. Wetzelaer;B. de Boer

  • Engineering ligand reactivity enables high-temperature operation of stable perovskite solar cells

    Unknown

  • Synthesis, characterization, and transistor response of semiconducting silole polymers with substantial hole mobility and air stability. Experiment and theory.

    Gang Lu;Hakan Usta;Chad Risko;Lian Wang

  • A molecular interaction–diffusion framework for predicting organic solar cell stability

    Masoud Ghasemi;Nrup Balar;Zhengxing Peng;Huawei Hu

  • A quantum-chemical perspective into low optical-gap polymers for highly-efficient organic solar cells

    Chad Risko;Michael D. McGehee;Jean-Luc Brédas

  • Transition from Tunneling to Hopping Transport in Long, Conjugated Oligo-imine Wires Connected to Metals

    Seong Ho Choi;Chad Risko;M. Carmen Ruiz Delgado;BongSoo Kim

  • Donor-Acceptor Copolymers of Relevance for Organic Photovoltaics: A Theoretical Investigation of the Impact of Chemical-Structure Modifications on the Electronic and Optical Properties

    Laxman Pandey;Chad Risko;Joseph E. Norton;Jean-Luc Brédas

  • Solution-Processed Organic Solar Cells with Power Conversion Efficiencies of 2.5% using Benzothiadiazole/Imide-Based Acceptors

    Jason T. Bloking;Xu Han;Andrew T. Higgs;John P. Kastrop

  • Noncovalent Intermolecular Interactions in Organic Electronic Materials: Implications for the Molecular Packing vs Electronic Properties of Acenes

    Christopher Sutton;Chad Risko;Jean-Luc Brédas

  • High current density, long duration cycling of soluble organic active species for non-aqueous redox flow batteries

    Jarrod D. Milshtein;Aman Preet Kaur;Matthew D. Casselman;Jeffrey A. Kowalski

  • Controlled conjugated backbone twisting for an increased open-circuit voltage while having a high short-circuit current in poly(hexylthiophene) derivatives.

    Sangwon Ko;Eric T. Hoke;Laxman Pandey;Sanghyun Hong

  • Electron Affinities of 1,1-Diaryl-2,3,4,5-tetraphenylsiloles: Direct Measurements and Comparison with Experimental and Theoretical Estimates

    Xiaowei Zhan;Chad Risko;Fabrice Amy;Calvin Chan

  • Rubrene-based single-crystal organic semiconductors: Synthesis, electronic structure, and charge-transport properties

    Kathryn A. McGarry;Wei Xie;Christopher Sutton;Chad Risko

  • Use of X-ray diffraction, molecular simulations, and spectroscopy to determine the molecular packing in a polymer-fullerene bimolecular crystal

    Nichole Cates Miller;Eunkyung Cho;Matthias J N Junk;Roman Gysel

  • Intervalence Transitions in the Mixed-Valence Monocations of Bis(triarylamines) Linked with Vinylene and Phenylene--Vinylene Bridges

    Stephen Barlow;Chad Risko;Sung-Jae Chung;Neil M Tucker

  • Heteroannulated acceptors based on benzothiadiazole

    Timothy C. Parker;Dinesh G. Patel;Karttikay Moudgil;Stephen Barlow

  • A stable two-electron-donating phenothiazine for application in nonaqueous redox flow batteries

    Jeffrey A. Kowalski;Matthew D. Casselman;Aman Preet Kaur;Jarrod D. Milshtein

  • Factors Governing Intercalation of Fullerenes and Other Small Molecules Between the Side Chains of Semiconducting Polymers Used in Solar Cells

    Nichole Cates Miller;Eunkyung Cho;Roman Gysel;Chad Risko

  • Synthetic Principles Directing Charge Transport in Low-Band-Gap Dithienosilole–Benzothiadiazole Copolymers

    Pierre M. Beaujuge;Pierre M. Beaujuge;Hoi Nok Tsao;Michael Ryan Hansen;Chad M. Amb

  • Ring Substituents Mediate the Morphology of PBDTTPD-PCBM Bulk-Heterojunction Solar Cells

    Julien Warnan;Abdulrahman El Labban;Clément Cabanetos;Eric T. Hoke

  • Exploiting Excited-State Aromaticity To Design Highly Stable Singlet Fission Materials.

    Kealan J Fallon;Peter Budden;Enrico Salvadori;Enrico Salvadori;Alex M Ganose

  • Modeling Electron and Hole Transport in Fluoroarene- Oligothiopene Semiconductors: Investigation of Geometric and Electronic Structure Properties**

    Sharon E. Koh;Chad Risko;Demetrio A. Da Silva Filho;Ohyun Kwon;Ohyun Kwon

Frequent Co-Authors

Jean-Luc Brédas
Jean-Luc Brédas University of Arizona
Seth R. Marder
Seth R. Marder University of Colorado Boulder
Stephen Barlow
Stephen Barlow Georgia Institute of Technology
Sean Parkin
Sean Parkin University of Kentucky
John E. Anthony
John E. Anthony University of Kentucky
Michael D. McGehee
Michael D. McGehee University of Colorado Boulder
Veaceslav Coropceanu
Veaceslav Coropceanu University of Arizona
Mark A. Ratner
Mark A. Ratner Northwestern University
Mikhail Yu. Antipin
Mikhail Yu. Antipin New Mexico Highlands University

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