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Peer-reviewedCC BY-NC-NDACS nanoscience Au

Transient Electroluminescence Delay and Capacitive Charging of the Hole Transport Layer in Quantum Dot Light-Emitting Diodes.

  • Conan Huang1
  • Nuri Oh2
  • Moonsub Shim1
  1. 1Department of Materials Science and Engineering and Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, 1304 W Green St., Urbana, Illinois 61801, United States.
  2. 2Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea.
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Abstract

The first critical steps of electroluminescence in quantum dot light-emitting diodes are the charge accumulation and transport processes upon the application of a driving voltage. Transient electroluminescence measurements with systematically varying offset voltages are carried out to separate out the capacitive charging effects from charge transport. Capacitive charging around the organic hole transport layer is shown to be the dominant contribution to the delay time between driving voltage application and the onset of electroluminescence. The minimum voltage required for light emission may be dictated by the capacitance of the hole transport layer when the electron injection barrier is small. Further implications of these findings are discussed.

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Cite

BibTeXRIS
BibTeX
@article{huang2026transient,
  title = {{Transient Electroluminescence Delay and Capacitive Charging of the Hole Transport Layer in Quantum Dot Light-Emitting Diodes.}},
  author = {Conan Huang and Nuri Oh and Moonsub Shim},
  journal = {ACS nanoscience Au},
  year = {2026},
  month = aug,
  doi = {10.1021/acsnanoscienceau.6c00100},
  url = {https://europepmc.org/article/MED/42921291},
  note = {CC BY-NC-ND},
}
RIS
TY  - JOUR
TI  - Transient Electroluminescence Delay and Capacitive Charging of the Hole Transport Layer in Quantum Dot Light-Emitting Diodes.
AU  - Conan Huang
AU  - Nuri Oh
AU  - Moonsub Shim
PY  - 2026
DA  - 2026/08/29
JO  - ACS nanoscience Au
DO  - 10.1021/acsnanoscienceau.6c00100
UR  - https://europepmc.org/article/MED/42921291
AB  - The first critical steps of electroluminescence in quantum dot light-emitting diodes are the charge accumulation and transport processes upon the application of a driving voltage. Transient electroluminescence measurements with systematically varying offset voltages are carried out to separate out the capacitive charging effects from charge transport. Capacitive charging around the organic hole transport layer is shown to be the dominant contribution to the delay time between driving voltage application and the onset of electroluminescence. The minimum voltage required for light emission may be dictated by the capacitance of the hole transport layer when the electron injection barrier is small. Further implications of these findings are discussed.
SN  - 2694-2496
ER  -