Single-layer organic light-emitting diodes using naphthyl diamine

S. C. Tse; K. K. Tsung; Shu Kong SO

doi:10.1063/1.2740110

Single-layer organic light-emitting diodes using naphthyl diamine

S. C. Tse^*, K. K. Tsung, Shu Kong SO

^*Corresponding author for this work

Department of Physics

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

41 Citations (Scopus)

Abstract

N, N′ -diphenyl- N, N′ -bis(1-naphthyl) (1, 1′ -biphenyl)- 4, 4′ diamine (NPB), a common hole transporter, was employed to fabricate single-layer organic light-emitting diodes (OLEDs). With a quasi-Ohmic anode, NPB device exhibited a bulk-limited hole current in the low-voltage region. Electron injection and light emission were clearly observed for applied voltages exceeding 4 V. In order to confine the recombination zone, intentional doping was applied to the single-layer device. After doping with perylene, the luminance and current efficiency of NPB device increased dramatically. It is expected that more efficient single-layer OLEDs can be achieved by using the doping strategy.

Original language	English
Article number	213502
Journal	Applied Physics Letters
Volume	90
Issue number	21
DOIs	https://doi.org/10.1063/1.2740110
Publication status	Published - 2007

Scopus Subject Areas

Physics and Astronomy (miscellaneous)

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@article{5006728f97c94f1393ab792d41ab309e,

title = "Single-layer organic light-emitting diodes using naphthyl diamine",

abstract = "N, N′ -diphenyl- N, N′ -bis(1-naphthyl) (1, 1′ -biphenyl)- 4, 4′ diamine (NPB), a common hole transporter, was employed to fabricate single-layer organic light-emitting diodes (OLEDs). With a quasi-Ohmic anode, NPB device exhibited a bulk-limited hole current in the low-voltage region. Electron injection and light emission were clearly observed for applied voltages exceeding 4 V. In order to confine the recombination zone, intentional doping was applied to the single-layer device. After doping with perylene, the luminance and current efficiency of NPB device increased dramatically. It is expected that more efficient single-layer OLEDs can be achieved by using the doping strategy.",

author = "Tse, {S. C.} and Tsung, {K. K.} and SO, {Shu Kong}",

note = "Funding Information: Support of this research from the Research Committee of HKBU under Grant No. FRG/05-06/II-41 and the Research Grant Council of Hong Kong under Grant No. HKBU/2173/04E is gratefully acknowledged.",

year = "2007",

doi = "10.1063/1.2740110",

language = "English",

volume = "90",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "21",

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TY - JOUR

T1 - Single-layer organic light-emitting diodes using naphthyl diamine

AU - Tse, S. C.

AU - Tsung, K. K.

AU - SO, Shu Kong

N1 - Funding Information: Support of this research from the Research Committee of HKBU under Grant No. FRG/05-06/II-41 and the Research Grant Council of Hong Kong under Grant No. HKBU/2173/04E is gratefully acknowledged.

PY - 2007

Y1 - 2007

N2 - N, N′ -diphenyl- N, N′ -bis(1-naphthyl) (1, 1′ -biphenyl)- 4, 4′ diamine (NPB), a common hole transporter, was employed to fabricate single-layer organic light-emitting diodes (OLEDs). With a quasi-Ohmic anode, NPB device exhibited a bulk-limited hole current in the low-voltage region. Electron injection and light emission were clearly observed for applied voltages exceeding 4 V. In order to confine the recombination zone, intentional doping was applied to the single-layer device. After doping with perylene, the luminance and current efficiency of NPB device increased dramatically. It is expected that more efficient single-layer OLEDs can be achieved by using the doping strategy.

AB - N, N′ -diphenyl- N, N′ -bis(1-naphthyl) (1, 1′ -biphenyl)- 4, 4′ diamine (NPB), a common hole transporter, was employed to fabricate single-layer organic light-emitting diodes (OLEDs). With a quasi-Ohmic anode, NPB device exhibited a bulk-limited hole current in the low-voltage region. Electron injection and light emission were clearly observed for applied voltages exceeding 4 V. In order to confine the recombination zone, intentional doping was applied to the single-layer device. After doping with perylene, the luminance and current efficiency of NPB device increased dramatically. It is expected that more efficient single-layer OLEDs can be achieved by using the doping strategy.

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U2 - 10.1063/1.2740110

DO - 10.1063/1.2740110

M3 - Article

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VL - 90

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 21

M1 - 213502

ER -

Single-layer organic light-emitting diodes using naphthyl diamine

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