Negative differential resistance phenomena in colloidal quantum dots-based organic light-emitting diodes

Shengyi Yang; Peng Liu; Sanwei Guo; Li Zhang; Dan Yang; Yurong Jiang; Bingsuo Zou

doi:10.1063/1.4862889

Negative differential resistance phenomena in colloidal quantum dots-based organic light-emitting diodes

Shengyi Yang^*, Peng Liu, Sanwei Guo, Li Zhang, Dan Yang, Yurong Jiang, Bingsuo Zou

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

The influence of ligands on the electrical behavior of CdSe/ZnS core-shell colloidal quantum dots (CQDs)-based organic light-emitting diodes is presented. Negative differential resistance (NDR) phenomena at room temperature are observed from single-layer device ITO/poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS)/CQDs/Al in which the original capping ligand tri-n-octylphosphine oxide (TOPO) of CQDs is exchanged with oleylamine, as well as in both bilayer device ITO/PEDOT:PSS/CQDs/BCP(10 nm)/Al and trilayer device ITO/PEDOT:PSS/CQDs/BCP(10 nm)/Alq₃(10 nm)/Al. However, such a kind of NDR phenomenon disappears if TOPO is exchanged with hexadecylamine. Therefore, NDR phenomenon depends greatly on the ligands of the CQDs, and the origin of NDR from these devices is discussed.

Original language	English
Article number	033301
Journal	Applied Physics Letters
Volume	104
Issue number	3
DOIs	https://doi.org/10.1063/1.4862889
Publication status	Published - 20 Jan 2014

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title = "Negative differential resistance phenomena in colloidal quantum dots-based organic light-emitting diodes",

abstract = "The influence of ligands on the electrical behavior of CdSe/ZnS core-shell colloidal quantum dots (CQDs)-based organic light-emitting diodes is presented. Negative differential resistance (NDR) phenomena at room temperature are observed from single-layer device ITO/poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS)/CQDs/Al in which the original capping ligand tri-n-octylphosphine oxide (TOPO) of CQDs is exchanged with oleylamine, as well as in both bilayer device ITO/PEDOT:PSS/CQDs/BCP(10 nm)/Al and trilayer device ITO/PEDOT:PSS/CQDs/BCP(10 nm)/Alq3(10 nm)/Al. However, such a kind of NDR phenomenon disappears if TOPO is exchanged with hexadecylamine. Therefore, NDR phenomenon depends greatly on the ligands of the CQDs, and the origin of NDR from these devices is discussed.",

author = "Shengyi Yang and Peng Liu and Sanwei Guo and Li Zhang and Dan Yang and Yurong Jiang and Bingsuo Zou",

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T1 - Negative differential resistance phenomena in colloidal quantum dots-based organic light-emitting diodes

AU - Yang, Shengyi

AU - Liu, Peng

AU - Guo, Sanwei

AU - Zhang, Li

AU - Yang, Dan

AU - Jiang, Yurong

AU - Zou, Bingsuo

PY - 2014/1/20

Y1 - 2014/1/20

N2 - The influence of ligands on the electrical behavior of CdSe/ZnS core-shell colloidal quantum dots (CQDs)-based organic light-emitting diodes is presented. Negative differential resistance (NDR) phenomena at room temperature are observed from single-layer device ITO/poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS)/CQDs/Al in which the original capping ligand tri-n-octylphosphine oxide (TOPO) of CQDs is exchanged with oleylamine, as well as in both bilayer device ITO/PEDOT:PSS/CQDs/BCP(10 nm)/Al and trilayer device ITO/PEDOT:PSS/CQDs/BCP(10 nm)/Alq3(10 nm)/Al. However, such a kind of NDR phenomenon disappears if TOPO is exchanged with hexadecylamine. Therefore, NDR phenomenon depends greatly on the ligands of the CQDs, and the origin of NDR from these devices is discussed.

AB - The influence of ligands on the electrical behavior of CdSe/ZnS core-shell colloidal quantum dots (CQDs)-based organic light-emitting diodes is presented. Negative differential resistance (NDR) phenomena at room temperature are observed from single-layer device ITO/poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS)/CQDs/Al in which the original capping ligand tri-n-octylphosphine oxide (TOPO) of CQDs is exchanged with oleylamine, as well as in both bilayer device ITO/PEDOT:PSS/CQDs/BCP(10 nm)/Al and trilayer device ITO/PEDOT:PSS/CQDs/BCP(10 nm)/Alq3(10 nm)/Al. However, such a kind of NDR phenomenon disappears if TOPO is exchanged with hexadecylamine. Therefore, NDR phenomenon depends greatly on the ligands of the CQDs, and the origin of NDR from these devices is discussed.

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DO - 10.1063/1.4862889

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VL - 104

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 3

M1 - 033301

ER -

Negative differential resistance phenomena in colloidal quantum dots-based organic light-emitting diodes

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