DOI: 10.1063/1.366452. Improved efficiencies in light emitting diodes made with CdSe(CdS) core/shell type nanocrystals and a semiconducting polymer

Improved efficiencies in light emitting diodes made with CdSe(CdS) core/shell type nanocrystals and a semiconducting polymer

10.1063/1.366452

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

We report experiments on bilayer light emitting diodes made with organically capped CdSe(CdS) core/shell type semiconductor nanocrystals and an electroluminescent (EL) semiconducting polymer [poly(p-phenylenevinylene) or PPV]. The devices emit from red to green with external quantum efficiencies of up to 0.22% at brightnesses of 600 cd/m2 and current densities of 1 A/cm2. They have operating voltages as low as 4 V and lifetimes under constant current flow of hundreds of hours. Most of these numbers are significant improvements over similar devices made with CdSe nanocrystals. The devices show either nanocrystal-only EL or a combination of nanocrystal and PPV EL, depending on nanocrystal layer thickness. The nanocrystal EL is dependent on nanocrystal size. Some devices show a voltage dependent spectral output. The spectral output is consistent with a field dependent electron range in the nanocrystal layer limited by carrier trapping.

Bibliography

Schlamp, M. C., Peng, X., & Alivisatos, A. P. (1997). Improved efficiencies in light emitting diodes made with CdSe(CdS) core/shell type nanocrystals and a semiconducting polymer. Journal of Applied Physics, 82(11), 5837â5842.

Authors 3

M. C. Schlamp (first)
Xiaogang Peng (additional)
A. P. Alivisatos (additional)

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Dates

Type	When
Created	23 years ago (July 26, 2002, 9:52 a.m.)
Deposited	1 year, 6 months ago (Feb. 2, 2024, 12:37 a.m.)
Indexed	2 weeks, 2 days ago (Aug. 5, 2025, 8:37 a.m.)
Issued	27 years, 8 months ago (Dec. 1, 1997)
Published	27 years, 8 months ago (Dec. 1, 1997)
Published Print	27 years, 8 months ago (Dec. 1, 1997)

Funders 0

None

BibTeX

@article{Schlamp_1997, title={Improved efficiencies in light emitting diodes made with CdSe(CdS) core/shell type nanocrystals and a semiconducting polymer}, volume={82}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.366452}, DOI={10.1063/1.366452}, number={11}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Schlamp, M. C. and Peng, Xiaogang and Alivisatos, A. P.}, year={1997}, month=dec, pages={5837–5842} }

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