World's Best Scientists 2026 revealed!
Helge Lemmetyinen

Helge Lemmetyinen

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 61 9231 8367 47 42 381 13398

Helge Lemmetyinen publications per year

The chart shows the history of publications by Helge Lemmetyinen between 1974 and 2020, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Helge Lemmetyinen published across 47 years, from 1974 to 2020, averaging 8.3 papers a year. Output peaked at 32 publications in 2010. 2 of the 389 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1974 to 2020. Vertical axis: number of publications, 0 to 32. Peak 32 publications in 2010. 1974: 1 publication 1975: 0 publications 1976: 0 publications 1977: 0 publications 1978: 2 publications 1979: 0 publications 1980: 1 publication 1981: 1 publication 1982: 1 publication 1983: 2 publications 1984: 1 publication 1985: 1 publication 1986: 0 publications 1987: 1 publication 1988: 1 publication 1989: 3 publications 1990: 2 publications 1991: 4 publications 1992: 6 publications 1993: 12 publications 1994: 4 publications 1995: 4 publications 1996: 5 publications 1997: 6 publications 1998: 6 publications 1999: 9 publications 2000: 21 publications 2001: 13 publications 2002: 9 publications 2003: 14 publications 2004: 11 publications 2005: 21 publications 2006: 18 publications 2007: 10 publications 2008: 21 publications 2009: 19 publications 2010: 32 publications 2011: 29 publications 2012: 29 publications 2013: 19 publications 2014: 15 publications 2015: 18 publications 2016: 7 publications 2017: 6 publications 2018: 2 publications 2019: 1 publication 2020: 1 publication
1974 2020

389 publications in total across all disciplines

View publications per year as a table
Helge Lemmetyinen: publications per year, 1974 to 2020
Year Publications
1974 1
1975 0
1976 0
1977 0
1978 2
1979 0
1980 1
1981 1
1982 1
1983 2
1984 1
1985 1
1986 0
1987 1
1988 1
1989 3
1990 2
1991 4
1992 6
1993 12
1994 4
1995 4
1996 5
1997 6
1998 6
1999 9
2000 21
2001 13
2002 9
2003 14
2004 11
2005 21
2006 18
2007 10
2008 21
2009 19
2010 32
2011 29
2012 29
2013 19
2014 15
2015 18
2016 7
2017 6
2018 2
2019 1
2020 1
Total 389
Download as CSV

Helge Lemmetyinen 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 Helge Lemmetyinen 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, 381–400 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: 381 publications — 78th percentile

78% 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
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
381–400 459 381
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
Download as CSV

Helge Lemmetyinen 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 Helge Lemmetyinen 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, 60–61 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: 61 D-Index — 49th percentile

49% 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
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930
60–61 882 61
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
Download as CSV

Overview

Helge Lemmetyinen is affiliated with Tampere University in Finland. Their research focuses primarily on materials science and engineering, exploring various aspects of electronic, optical, and magnetic materials as well as electrical and electronic engineering. The scientific contributions of Helge Lemmetyinen encompass several interconnected subfields and topics.

The scientist's main fields of study include:

  • Materials Science
  • Engineering

Specific subfields of research cover:

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Helge Lemmetyinen's work addresses several important research topics, including:

  • Perovskite Materials and Applications
  • Nonlinear Optical Materials Research
  • Organic and Molecular Conductors Research

Their recent published work includes a paper titled Electron transfer in oriented donor-acceptor dyads, intralayer charge migration, and formation of interlayer charge separated states in multi-layered Langmuir-Schäfer films, published in 2020 in the journal Physical Chemistry Chemical Physics. This paper has attracted citations and contributes to the understanding of complex charge transfer mechanisms in multi-layered molecular films.

Helge Lemmetyinen has collaborated with several researchers throughout their career. Frequent co-authors include:

  • А. S. Alekseev
  • Alexander Efimov
  • Vladimir Chukharev
  • A. B. Ivanov

The primary venue for Helge Lemmetyinen's publications is Physical Chemistry Chemical Physics, reflecting a focus on physical chemistry and chemical physics domains.

Best Publications

  • Electron-transfer state of 9-mesityl-10-methylacridinium ion with a much longer lifetime and higher energy than that of the natural photosynthetic reaction center.

    Shunichi Fukuzumi;Hiroaki Kotani;Kei Ohkubo;Seiji Ogo

  • Photoinduced Electron Transfer in Phytochlorin-(60)Fullerene Dyads

    Nikolai V. Tkachenko;Lasse Rantala;Andrei Y. Tauber;Juho Helaja

  • An Extremely Small Reorganization Energy of Electron Transfer in Porphyrin−Fullerene Dyad

    Hiroshi Imahori;Nikolai V. Tkachenko;Visa Vehmanen;Koichi Tamaki

  • Charge separation in a nonfluorescent donor-acceptor dyad derived from boron dipyrromethene dye, leading to photocurrent generation.

    Shigeki Hattori;Kei Ohkubo;Yasuteru Urano;Hisato Sunahara

  • Self-assembled hydrophobin protein films at the air-water interface: Structural analysis and molecular engineering

    Géza R. Szilvay;Arja Paananen;Katri Laurikainen;Elina Vuorimaa

  • Ultrafast Photodynamics of Exciplex Formation and Photoinduced Electron Transfer in Porphyrin−Fullerene Dyads Linked at Close Proximity

    Nikolai V. Tkachenko;Helge Lemmetyinen;Junko Sonoda;Kei Ohkubo

  • Charge-transfer emission of compact porphyrin-fullerene dyad analyzed by Marcus theory of electron-transfer.

    Visa Vehmanen;Nikolai V. Tkachenko;Hiroshi Imahori;Shunichi Fukuzumi

  • Exciplex Intermediates in Photoinduced Electron Transfer of Porphyrin−Fullerene Dyads

    Tero J. Kesti;Nikolai V. Tkachenko;Visa Vehmanen;Hiroko Yamada

  • Effects of meso-Diarylamino Group of Porphyrins as Sensitizers in Dye-Sensitized Solar Cells on Optical, Electrochemical, and Photovoltaic Properties

    Hiroshi Imahori;Yusuke Matsubara;Hiroaki Iijima;Tomokazu Umeyama

  • Structural hierarchy in molecular films of two class II hydrophobins

    Arja Paananen;Elina Vuorimaa;Mika Torkkeli;Merja Penttilä

  • 1,7- And 1,6-Regioisomers of Diphenoxy and Dipyrrolidinyl Substituted Perylene Diimides: Synthesis, Separation, Characterization, and Comparison of Electrochemical and Optical Properties†

    Rajeev K. Dubey;Alexander Efimov;Helge Lemmetyinen

  • Cross-linking kinetics and swelling behaviour of aliphatic polyurethane

    S. Li;R. Vatanparast;H. Lemmetyinen

  • Azobenzene-linked porphyrin-fullerene dyads.

    David I. Schuster;Ke Li;Dirk M. Guldi;Amit Palkar

  • Nonlinear-optical activity and biomolecular chirality

    Thierry Verbiest;Martti Kauranen;Andre Persoons;Marjo Ikonen

  • Photosynthetic Antenna−Reaction Center Mimicry: Sequential Energy- and Electron Transfer in a Self-assembled Supramolecular Triad Composed of Boron Dipyrrin, Zinc Porphyrin and Fullerene

    Eranda Maligaspe;Nikolai V. Tkachenko;Navaneetha K. Subbaiyan;Raghu Chitta

  • Photoinduced charge and energy transfer in phthalocyanine-functionalized gold nanoparticles

    Anne Kotiaho;Riikka Lahtinen;Alexander Efimov;Hanna Kaisa Metsberg

  • Fe2O3-TiO2 Nano-heterostructure Photoanodes for Highly Efficient Solar Water Oxidation

    Davide Barreca;Giorgio Carraro;Alberto Gasparotto;Chiara Maccato

  • Energy and electron transfer in β-alkynyl-linked porphyrin-[60]fullerene dyads

    Sean A. Vail;David I. Schuster;Dirk M. Guldi;Marja Isosomppi

  • Near infra-red emission of charge-transfer complexes of porphyrin–fullerene films

    Nikolay V. Tkachenko;Claudia Guenther;Hiroshi Imahori;Koichi Tamaki

  • Tuning the ground-state and excited-state interchromophore interactions in porphyrin-fullerene π-stacks

    Vladimir Chukharev;Nikolai V. Tkachenko;Alexander Efimov;Dirk M. Guldi

Frequent Co-Authors

Nikolai V. Tkachenko
Nikolai V. Tkachenko Tampere University
Hiroshi Imahori
Hiroshi Imahori Kyoto University
Tomokazu Umeyama
Tomokazu Umeyama Kyoto University
Shunichi Fukuzumi
Shunichi Fukuzumi Osaka University
Yoshihiro Matano
Yoshihiro Matano Niigata University
Kei Ohkubo
Kei Ohkubo Osaka University
Francis D'Souza
Francis D'Souza University of North Texas
Mircea Guina
Mircea Guina Tampere University
M. Pessa
M. Pessa Tampere University
Seiji Isoda
Seiji Isoda Kyoto University

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Pursuing a chemistry degree in the USA opens doors to diverse career opportunities across industries. For those interested in legal aspects, online degrees for paralegals provide specialized knowledge that complements a chemistry background, especially in patent law or environmental regulations.

Another promising field is pharmaceutical sales, where understanding chemical compounds is essential. Aspiring professionals can explore how much do pharmaceutical reps make to gauge potential earnings and career growth. This role blends scientific knowledge with strong communication skills.

For students aiming higher in the healthcare sector, becoming a pharmacist requires extensive education. Insights on how much schooling to be a pharmacist can help plan your academic journey and understand the commitment involved in this rewarding career.

Additionally, forensic sciences offer unique career paths such as forensic autopsy technicians. Explore forensic autopsy technician roles to learn about the education requirements, salary expectations, and job outlook in this specialized field.

Each pathway leverages chemistry knowledge differently, making it important to research online degrees and careers that align with your interests and goals.

Best Scientists Citing Helge Lemmetyinen

Trending Scientists

Recently Published Articles