View in EDS HTML Full Text PDF Full Text

Room Temperature Light Emission from Superatom-like Ge–Core/Si–Shell Quantum Dots.

Saved in:
Bibliographic Details
Title: Room Temperature Light Emission from Superatom-like Ge–Core/Si–Shell Quantum Dots.
Authors: Makihara, Katsunori1,2 (AUTHOR) makihara@nuee.nagoya-u.ac.jp, Yamamoto, Yuji2 (AUTHOR), Imai, Yuki1 (AUTHOR), Taoka, Noriyuki1 (AUTHOR), Schubert, Markus Andreas2 (AUTHOR), Tillack, Bernd2,3 (AUTHOR), Miyazaki, Seiichi1 (AUTHOR)
Source: Nanomaterials (2079-4991). May2023, Vol. 13 Issue 9, p1475. 8p.
Subjects: Quantum dots, Potential well, Luminescence measurement, Light emitting diodes, Energy bands, Electroluminescence
Abstract: We have demonstrated the high–density formation of super–atom–like Si quantum dots with Ge–core on ultrathin SiO2 with control of high–selective chemical–vapor deposition and applied them to an active layer of light–emitting diodes (LEDs). Through luminescence measurements, we have reported characteristics carrier confinement and recombination properties in the Ge–core, reflecting the type II energy band discontinuity between the Si–clad and Ge–core. Additionally, under forward bias conditions over a threshold bias for LEDs, electroluminescence becomes observable at room temperature in the near–infrared region and is attributed to radiative recombination between quantized states in the Ge–core with a deep potential well for holes caused by electron/hole simultaneous injection from the gate and substrate, respectively. The results will lead to the development of Si–based light–emitting devices that are highly compatible with Si–ultra–large–scale integration processing, which has been believed to have extreme difficulty in realizing silicon photonics. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Full text is not displayed to guests.
FullText Links:
  – Type: pdflink
Text:
  Availability: 1
Header DbId: egs
DbLabel: Engineering Source
An: 163687608
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Room Temperature Light Emission from Superatom-like Ge–Core/Si–Shell Quantum Dots.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Makihara%2C+Katsunori%22">Makihara, Katsunori</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> makihara@nuee.nagoya-u.ac.jp</i><br /><searchLink fieldCode="AR" term="%22Yamamoto%2C+Yuji%22">Yamamoto, Yuji</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Imai%2C+Yuki%22">Imai, Yuki</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Taoka%2C+Noriyuki%22">Taoka, Noriyuki</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schubert%2C+Markus+Andreas%22">Schubert, Markus Andreas</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tillack%2C+Bernd%22">Tillack, Bernd</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Miyazaki%2C+Seiichi%22">Miyazaki, Seiichi</searchLink><relatesTo>1</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. May2023, Vol. 13 Issue 9, p1475. 8p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Quantum+dots%22">Quantum dots</searchLink><br /><searchLink fieldCode="DE" term="%22Potential+well%22">Potential well</searchLink><br /><searchLink fieldCode="DE" term="%22Luminescence+measurement%22">Luminescence measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Light+emitting+diodes%22">Light emitting diodes</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+bands%22">Energy bands</searchLink><br /><searchLink fieldCode="DE" term="%22Electroluminescence%22">Electroluminescence</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: We have demonstrated the high–density formation of super–atom–like Si quantum dots with Ge–core on ultrathin SiO2 with control of high–selective chemical–vapor deposition and applied them to an active layer of light–emitting diodes (LEDs). Through luminescence measurements, we have reported characteristics carrier confinement and recombination properties in the Ge–core, reflecting the type II energy band discontinuity between the Si–clad and Ge–core. Additionally, under forward bias conditions over a threshold bias for LEDs, electroluminescence becomes observable at room temperature in the near–infrared region and is attributed to radiative recombination between quantized states in the Ge–core with a deep potential well for holes caused by electron/hole simultaneous injection from the gate and substrate, respectively. The results will lead to the development of Si–based light–emitting devices that are highly compatible with Si–ultra–large–scale integration processing, which has been believed to have extreme difficulty in realizing silicon photonics. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=163687608
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.3390/nano13091475
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 8
        StartPage: 1475
    Subjects:
      – SubjectFull: Quantum dots
        Type: general
      – SubjectFull: Potential well
        Type: general
      – SubjectFull: Luminescence measurement
        Type: general
      – SubjectFull: Light emitting diodes
        Type: general
      – SubjectFull: Energy bands
        Type: general
      – SubjectFull: Electroluminescence
        Type: general
    Titles:
      – TitleFull: Room Temperature Light Emission from Superatom-like Ge–Core/Si–Shell Quantum Dots.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Makihara, Katsunori
      – PersonEntity:
          Name:
            NameFull: Yamamoto, Yuji
      – PersonEntity:
          Name:
            NameFull: Imai, Yuki
      – PersonEntity:
          Name:
            NameFull: Taoka, Noriyuki
      – PersonEntity:
          Name:
            NameFull: Schubert, Markus Andreas
      – PersonEntity:
          Name:
            NameFull: Tillack, Bernd
      – PersonEntity:
          Name:
            NameFull: Miyazaki, Seiichi
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 05
              Text: May2023
              Type: published
              Y: 2023
          Identifiers:
            – Type: issn-print
              Value: 20794991
          Numbering:
            – Type: volume
              Value: 13
            – Type: issue
              Value: 9
          Titles:
            – TitleFull: Nanomaterials (2079-4991)
              Type: main
ResultId 1