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Sadao Adachi

Sadao Adachi

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Materials Science 70 4345 4204 201 197 485 25519

Sadao Adachi publications per year

The chart shows the history of publications by Sadao Adachi between 1975 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Sadao Adachi published across 51 years, from 1975 to 2025, averaging 10 papers a year. Output peaked at 71 publications in 1999. 6 of the 508 publications appeared in the last two years.

No. of publications
20 40 60
Bar chart. Horizontal axis: year, 1975 to 2025. Vertical axis: number of publications, 0 to 71. Peak 71 publications in 1999. 1975: 3 publications 1976: 1 publication 1977: 1 publication 1978: 5 publications 1979: 9 publications 1980: 3 publications 1981: 2 publications 1982: 6 publications 1983: 2 publications 1984: 5 publications 1985: 4 publications 1986: 3 publications 1987: 5 publications 1988: 6 publications 1989: 5 publications 1990: 4 publications 1991: 10 publications 1992: 8 publications 1993: 14 publications 1994: 25 publications 1995: 7 publications 1996: 8 publications 1997: 7 publications 1998: 6 publications 1999: 71 publications 2000: 10 publications 2001: 8 publications 2002: 6 publications 2003: 7 publications 2004: 4 publications 2005: 26 publications 2006: 7 publications 2007: 13 publications 2008: 6 publications 2009: 15 publications 2010: 19 publications 2011: 18 publications 2012: 21 publications 2013: 9 publications 2014: 18 publications 2015: 21 publications 2016: 25 publications 2017: 13 publications 2018: 6 publications 2019: 2 publications 2020: 6 publications 2021: 10 publications 2022: 9 publications 2023: 3 publications 2024: 3 publications 2025: 3 publications
1975 2025

508 publications in total across all disciplines

View publications per year as a table
Sadao Adachi: publications per year, 1975 to 2025
Year Publications
1975 3
1976 1
1977 1
1978 5
1979 9
1980 3
1981 2
1982 6
1983 2
1984 5
1985 4
1986 3
1987 5
1988 6
1989 5
1990 4
1991 10
1992 8
1993 14
1994 25
1995 7
1996 8
1997 7
1998 6
1999 71
2000 10
2001 8
2002 6
2003 7
2004 4
2005 26
2006 7
2007 13
2008 6
2009 15
2010 19
2011 18
2012 21
2013 9
2014 18
2015 21
2016 25
2017 13
2018 6
2019 2
2020 6
2021 10
2022 9
2023 3
2024 3
2025 3
Total 508
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Sadao Adachi 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 Sadao Adachi 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, 470–489 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: 485 publications — 85th percentile

85% 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
330–349 477
350–369 440
370–389 356
390–409 321
410–429 256
430–449 246
450–469 216
470–489 212 485
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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Sadao Adachi 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 Sadao Adachi 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, 70–71 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: 70 D-Index — 66th percentile

66% 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
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 70
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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Overview

Sadao Adachi is affiliated with Gunma University in Japan and focuses research efforts primarily within materials science and chemistry. The scientist's work concentrates on luminescence properties and solid-state spectroscopy, contributing to 53 publications in materials science and 19 in chemistry.

The research scope encompasses several specialized subfields, including materials chemistry, inorganic chemistry, electrical and electronic engineering, ceramics and composites, and radiation. This diverse expertise supports investigations into advanced materials with luminescent properties and their underlying spectroscopic characteristics.

Key topics addressed in the published work are:

  • Luminescence Properties of Advanced Materials
  • Solid-state spectroscopy and crystallography
  • Inorganic Fluorides and Related Compounds
  • Glass properties and applications
  • Perovskite Materials and Applications
  • Gas Sensing Nanomaterials and Sensors
  • Radiation Detection and Scintillator Technologies

The publication record shows a strong presence in the ECS Journal of Solid State Science and Technology with 20 articles, followed by 9 publications in the Journal of Luminescence. Contributions also appear in Optical Materials and Optical Materials X.

Frequent collaboration includes coauthors such as Akihiro Tatsumi and Masashi Okubo.

Selected recent papers illustrate the research themes:

  • Review-Photoluminescence Properties of Cr3+-Activated Oxide Phosphors (2021), ECS Journal of Solid State Science and Technology
  • Mn4+ and Cr3+ ions in red and deep red-emitting phosphors: Spectral analysis and Racah parameter determination (2020), Journal of Luminescence
  • Luminescence spectroscopy of Cr3+ in an oxide: A strong or weak crystal-field phosphor? (2021), Journal of Luminescence
  • Spectroscopy of Cr3+ activator: Tanabe−Sugano diagram and Racah parameter analysis (2020), Journal of Luminescence
  • Review-Temperature Dependence of Luminescence Intensity and Decay Time in Mn4+-Activated Fluoride and Oxyfluoride Phosphors (2021), ECS Journal of Solid State Science and Technology

Best Publications

  • GaAs, AlAs, and AlxGa1−xAs: Material parameters for use in research and device applications

    Sadao Adachi

  • Material parameters of In1−xGaxAsyP1−y and related binaries

    Sadao Adachi

  • Optical dispersion relations for GaP, GaAs, GaSb, InP, InAs, InSb, AlxGa1−xAs, and In1−xGaxAsyP1−y

    Sadao Adachi

  • Optical constants of ZnO

    Hisashi Yoshikawa;Sadao Adachi

  • Band gaps and refractive indices of AlGaAsSb, GaInAsSb, and InPAsSb: Key properties for a variety of the 2–4‐μm optoelectronic device applications

    Sadao Adachi

  • Optical properties of hexagonal GaN

    Takahiro Kawashima;Hisashi Yoshikawa;Sadao Adachi;Shunro Fuke

  • Mn4 + -Activated Red Photoluminescence in K2SiF6 Phosphor

    Toru Takahashi;Sadao Adachi

  • Photoluminescence properties of Mn4+-activated oxide phosphors for use in white-LED applications: A review

    Sadao Adachi

  • Optical Properties of Crystalline and Amorphous Semiconductors

    Unknown

  • Model dielectric constants of GaP, GaAs, GaSb, InP, InAs, and InSb.

    Unknown

  • Chemical Etching Characteristics of ( 001 ) InP

    Sadao Adachi;Hitoshi Kawaguchi

  • Refractive indices of III–V compounds: Key properties of InGaAsP relevant to device design

    Sadao Adachi

  • Photoluminescence spectra and modeling analyses of Mn 4+ -activated fluoride phosphors: A review

    Sadao Adachi

  • Properties of Na2SiF6:Mn4+ and Na2GeF6:Mn4+ red phosphors synthesized by wet chemical etching

    Yan Kai Xu;Sadao Adachi

  • Optical properties of cubic and hexagonal CdSe

    Susumu Ninomiya;Sadao Adachi

  • Direct synthesis and properties of K2SiF6:Mn4+ phosphor by wet chemical etching of Si wafer

    Sadao Adachi;Toru Takahashi

  • Optical properties of wurtzite CdS

    Susumu Ninomiya;Sadao Adachi

  • Lattice thermal resistivity of III–V compound alloys

    Sadao Adachi

  • Optical properties of ZnTe

    Kohzo Sato;Sadao Adachi

  • Model dielectric constants of Si and Ge

    Sadao Adachi

  • Optical properties of CdTe: Experiment and modeling

    Sadao Adachi;Toshifumi Kimura;Norihiro Suzuki

  • Photoluminescent properties of K2GeF6:Mn4+ red phosphor synthesized from aqueous HF/KMnO4 solution

    Sadao Adachi;Toru Takahashi

  • Optical properties of Mn4+-activated Na2SnF6 and Cs2SnF6 red phosphors

    Yusuke Arai;Sadao Adachi

  • Red and Deep Red Emissions from Cubic K2SiF6:Mn4+ and Hexagonal K2MnF6 Synthesized in HF/KMnO4/KHF2/Si Solutions

    Ryota Kasa;Sadao Adachi

Frequent Co-Authors

Minoru Fujii
Minoru Fujii Kobe University
Tadao Ishibashi
Tadao Ishibashi NTT (Japan)
Wai Kin Chan
Wai Kin Chan University of Hong Kong
D. Mangalaraj
D. Mangalaraj Bharathiar University
Hoi Sing Kwok
Hoi Sing Kwok Hong Kong University of Science and Technology
Naoto Koshizaki
Naoto Koshizaki Hokkaido University
Aleksandra B. Djurišić
Aleksandra B. Djurišić University of Hong Kong
Malcolm K. Jones
Malcolm K. Jones University of Queensland
Keiji Sasaki
Keiji Sasaki Hokkaido University

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