# Enhancing external quantum efficiency in a sky-blue OLED by charge transfer via Si quantum dots

https://mdr.nims.go.jp/datasets/db900879-7cf3-4bd5-90ea-9288f58a3ad7

## File

- [DiscoverNano2025_MDR用.pdf](https://mdr.nims.go.jp/filesets/b80a38da-d8aa-46e0-ab2a-92c4a84528e5/download) ([Detail](https://mdr.nims.go.jp/filesets/b80a38da-d8aa-46e0-ab2a-92c4a84528e5.md))

## Id

db900879-7cf3-4bd5-90ea-9288f58a3ad7

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-11-10T05:37:01.827847Z

## Updated at

2025-11-12T07:30:12.370748Z

## Published at

2025-11-12T07:24:02.083533Z

## Doi



## First published url

https://doi.org/10.1186/s11671-024-04171-w

## Date published

2024-12-14

## Recorded date published



## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Enhancing external quantum efficiency in a sky-blue OLED by charge transfer
    via Si quantum dots
  title_type: original
  lang: en

## Description

- description: "Organic light-emitting diodes aim to achieve high efficiency by using
    excitons to achieve a 100% quantum efficiency (QE). However, developing functional
    organic materials for this purpose can be time-consuming. To address this challenge,
    a new method has been proposed to incorporate inorganic quantum dots into the
    organic luminescent layer to enable unlimited exciton formation and approach the
    100% QE limit. Inorganic quantum dots are clusters of atoms that contain numerous
    thermally generated electrons and holes at conduction and valence bands. Immersed
    quantum \r\ndots act as charge generation centers, providing electrons and holes
    with unlimited amounts to form excitons. After radiative recombination, these
    excitons generate photons that cause internal QE to nearly 100%. This concept
    has been demonstrated using Silicon quantum dots (SiQDs) and phosphorescent materials.
    The average size of SiQDs is approximately 6 nm, and they are well-dispersed within
    the guest–host blue phosphorescent light-emitting materials. With only 5× ­10–3%
    (in weight) of SiQDs in the precursor, external QE increased from 2 to 17.7%,
    nearly a nine-fold enhancement. The prolonged decay time from 1.68 to 5.97 ns
    indicates that electrons are transferred from SiQDs to the luminescent materials.
    This universal method can be applied to green and red emissions with various inorganic
    quantum dots in different organic luminescent material systems."
  description_type: abstract
  lang: und

## Creator

- name: Zingway Pei
  role: author
- name: Han Yun Wei
  role: author
- name: Yi Chun Liu
  role: author
- name: Thiyagu Subramani
  role: author
- name: Naoki Fukata
  role: author
  orcid: https://orcid.org/0000-0002-0986-8485

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Quantum Dots, Quantum Efficiency, Phosphorescent, Light-Emitting Diode
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Discover Nano
  issn: '27319229'
  volume: '19'
  issue: '1'
  article_number: '202'

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## Related item



## Funding

- identifier: "“Innovation and Development Center of Sustainable Agriculture” from
    The Featured Areas Research Center Program within the framework of the Higher
    Education Sprout Project"
  funder_name: Ministry of Education
- identifier: NSTC-112-2221-E-005-066-, NSTC-111-2622-E-005-008
  funder_name: National Science and Technology Council
- identifier: NSTC-112-2221-E-005-066-, NSTC-111-2622-E-005-008
  funder_name: National Science and Technology Council
- identifier: NSTC-112-2221-E-005-066-, NSTC-111-2622-E-005-008
  funder_name: National Science and Technology Council
- identifier: World Premier International Research Center Initiative WPII
  funder_name: MEXT, Japan
- identifier: World Premier International Research Center Initiative WPII
  funder_name: MEXT, Japan

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## Fileset

- id: b80a38da-d8aa-46e0-ab2a-92c4a84528e5
  filename: DiscoverNano2025_MDR用.pdf
  content_type: application/pdf
  size: 1405101
  md5: 5444eefc45008b413715f96c465d7a3a

## Thumbnail

fileset_id: b80a38da-d8aa-46e0-ab2a-92c4a84528e5
filename: DiscoverNano2025_MDR用.pdf