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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 48 15135 13638 842 750 179 9566

Thomas J. Penfold publications per year

The chart shows the history of publications by Thomas J. Penfold between 2007 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Thomas J. Penfold published across 19 years, from 2007 to 2025, averaging 14.8 papers a year. Output peaked at 38 publications in 2021. 30 of the 282 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 2007 to 2025. Vertical axis: number of publications, 0 to 38. Peak 38 publications in 2021. 2007: 1 publication 2008: 0 publications 2009: 2 publications 2010: 4 publications 2011: 5 publications 2012: 12 publications 2013: 9 publications 2014: 13 publications 2015: 13 publications 2016: 12 publications 2017: 36 publications 2018: 19 publications 2019: 18 publications 2020: 21 publications 2021: 38 publications 2022: 19 publications 2023: 30 publications 2024: 24 publications 2025: 6 publications
2007 2025

282 publications in total across all disciplines

View publications per year as a table
Thomas J. Penfold: publications per year, 2007 to 2025
Year Publications
2007 1
2008 0
2009 2
2010 4
2011 5
2012 12
2013 9
2014 13
2015 13
2016 12
2017 36
2018 19
2019 18
2020 21
2021 38
2022 19
2023 30
2024 24
2025 6
Total 282
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Thomas J. Penfold 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 Thomas J. Penfold sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 161–180 publications, is where this scientist sits. 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
61–80 publications 1,295+

This scientist: 179 publications — 25th percentile

25% of scientists in this discipline score the same or lower.

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

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350 179
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979
281–300 939
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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Thomas J. Penfold 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 Thomas J. Penfold sits on this spectrum.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 48–49 D-Index, is where this scientist sits. 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
40–41 D-Index 159+

This scientist: 48 D-Index — 16th percentile

16% of scientists in this discipline score the same or lower.

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

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835 48
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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Overview

Thomas J. Penfold is a researcher affiliated with Newcastle University in the United Kingdom. Their work primarily spans the fields of Materials Science and Engineering, with significant contributions to subfields such as Materials Chemistry, Electrical and Electronic Engineering, Organic Chemistry, Atomic and Molecular Physics and Optics, and Radiation.

Their research covers various main topics, including:

  • X-ray Diffraction in Crystallography
  • Organic Light-Emitting Diodes Research
  • Crystallization and Solubility Studies
  • Luminescence and Fluorescent Materials
  • Organic Electronics and Photovoltaics
  • Machine Learning in Materials Science
  • Molecular Junctions and Nanostructures

Thomas J. Penfold has been published frequently in several venues, with notable repeated contributions to:

  • The Cambridge Structural Database
  • Zenodo (CERN European Organization for Nuclear Research)
  • Physical Chemistry Chemical Physics
  • Chemical Science
  • The Journal of Physical Chemistry A

Their recent papers include:

  • Pathways to increase the dissymmetry in the interaction of chiral light and chiral molecules, 2021, Chemical Science
  • A Deep Neural Network for the Rapid Prediction of X-ray Absorption Spectra, 2020, The Journal of Physical Chemistry A
  • Understanding and Designing Thermally Activated Delayed Fluorescence Emitters: Beyond the Energy Gap Approximation, 2020, The Chemical Record
  • Progress in the Theory of X-ray Spectroscopy: From Quantum Chemistry to Machine Learning and Ultrafast Dynamics, 2021, The Journal of Physical Chemistry A
  • Competition between the heavy atom effect and vibronic coupling in donor-bridge-acceptor organometallics, 2020, Physical Chemistry Chemical Physics

Frequent collaborators in their research include:

  • Paul G. Waddell
  • Julien Eng
  • Michael R. Probert
  • Michael J. Hall
  • Conor D. Rankine

Best Publications

  • Revealing the spin-vibronic coupling mechanism of thermally activated delayed fluorescence.

    Marc K. Etherington;Jamie Gibson;Heather F. Higginbotham;Thomas J. Penfold

  • Spin-Vibronic Mechanism for Intersystem Crossing

    Thomas J. Penfold;Etienne Gindensperger;Chantal Daniel;Christel M. Marian

  • The Importance of Vibronic Coupling for Efficient Reverse Intersystem Crossing in Thermally Activated Delayed Fluorescence Molecules

    Jamie Gibson;Andrew P. Monkman;Thomas J. Penfold

  • Photophysics of thermally activated delayed fluorescence molecules

    Fernando B Dias;Thomas J Penfold;Andrew P Monkman

  • The theory of thermally activated delayed fluorescence for organic light emitting diodes

    T. J. Penfold;F. B. Dias;A. P. Monkman

  • Regio- and conformational isomerization critical to design of efficient thermally-activated delayed fluorescence emitters.

    Marc K. Etherington;Flavio Franchello;Jamie Gibson;Thomas Northey

  • Pathways to increase the dissymmetry in the interaction of chiral light and chiral molecules.

    Jake L. Greenfield;Jessica Wade;Jochen R. Brandt;Xingyuan Shi

  • Recent experimental and theoretical developments in time-resolved X-ray spectroscopies

    C.J. Milne;T.J. Penfold;T.J. Penfold;M. Chergui

  • On Predicting the Excited State Properties of Thermally Activated Delayed Fluorescence Emitters

    Thomas J. Penfold

  • Triazatruxene: A Rigid Central Donor Unit for a D-A3 Thermally Activated Delayed Fluorescence Material Exhibiting Sub-Microsecond Reverse Intersystem Crossing and Unity Quantum Yield via Multiple Singlet-Triplet State Pairs.

    Paloma L. dos Santos;Jonathan S. Ward;Daniel G. Congrave;Andrei S. Batsanov

  • Nonadiabatic coupling reduces the activation energy in thermally activated delayed fluorescence.

    Jamie Gibson;Thomas Penfold

  • The role of solid state solvation on the charge transfer state of a thermally activated delayed fluorescence emitter

    Thomas Northey;Jessica E Stacey;Thomas James Penfold

  • Solvent-induced luminescence quenching: static and time-resolved X-ray absorption spectroscopy of a copper(I) phenanthroline complex.

    T. J. Penfold;S. Karlsson;G. Capano;F. A. Lima

  • Competing ultrafast intersystem crossing and internal conversion in the "channel 3" region of benzene

    R. S. Minns;D. S. N. Parker;T. J. Penfold;G. A. Worth

  • Mapping of the photoinduced electron traps in TiO 2 by picosecond x-ray absorption spectroscopy

    M. Hannelore Rittmann-Frank;Chris J. Milne;Jochen Rittmann;Marco Reinhard

  • Revealing hole trapping in zinc oxide nanoparticles by time-resolved X-ray spectroscopy.

    Thomas J. Penfold;Jakub Szlachetko;Fabio G. Santomauro;Alexander Britz

  • The contributions of molecular vibrations and higher triplet levels to the intersystem crossing mechanism in metal-free organic emitters

    Rongjuan Huang;João Avó;Thomas Northey;E. Chaning-Pearce

  • A Quantum Dynamics Study of the Ultrafast Relaxation in a Prototypical Cu(I)-Phenanthroline

    G. Capano;M. Chergui;U. Rothlisberger;I. Tavernelli

  • Ultrafast dynamics of the S1 excited state of benzene

    D.S.N. Parker;R.S. Minns;T.J. Penfold;G.A. Worth

  • Probing the transition from hydrophilic to hydrophobic solvation with atomic scale resolution

    Van-Thai Pham;Thomas J Penfold;Thomas J Penfold;Renske M van der Veen;Renske M van der Veen;Frederico Lima

Frequent Co-Authors

Majed Chergui
Majed Chergui École Polytechnique Fédérale de Lausanne
Ivano Tavernelli
Ivano Tavernelli IBM (United States)
Ursula Rothlisberger
Ursula Rothlisberger École Polytechnique Fédérale de Lausanne
Fernando B. Dias
Fernando B. Dias Durham University
Andrew P. Monkman
Andrew P. Monkman Durham University
Martin R. Bryce
Martin R. Bryce Durham University
Michael W. George
Michael W. George University of Nottingham
Manfred Bochmann
Manfred Bochmann University of East Anglia

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