Solution-processed small molecule-based blue light-emitting diodes using conjugated polyelectrolytes as electron injection layers

Bright Walker; Arnold Tamayo; Jihua Yang; Jacek Z. Brzezinski; Thuc Quyen Nguyen

doi:10.1063/1.2968189

Solution-processed small molecule-based blue light-emitting diodes using conjugated polyelectrolytes as electron injection layers

Bright Walker
, Arnold Tamayo
, Jihua Yang
, Jacek Z. Brzezinski
, Thuc Quyen Nguyen

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

27 Scopus citations

Abstract

Organic blue light-emitting diodes were studied using the solution processable small molecule 2,7-dipyrenyl- 9,9′ -dioctyl-fluorene (DPF) as the light-emitting material. The devices were fabricated in two simple structures: indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene)- poly(styrenesulfonate) (PEDOT:PSS)/DPF/LiF/Al and ITO/PEDOT:PSS/DPF/PFN-BIm ₄, where PFN-BIm₄ is poly [9,9′ -bis [6″-(N,N,N -trimethylammonium)hexyl]fluorene-alt-co-phenylene] with tetrakis(imidazolyl)borate counterions. The LiF or PFN-BIm₄ act as electron injection layers. The ITO/PEDOT:PSS/DPF/PFN-BIm₄/Al device, in which all organic layers are cast from solution, has a turn-on voltage of 3.8 V, a luminance of 2000 cd/m², and an efficiency of 0.6 cd/A. Using the PFN-BIm₄ layer shows a significant improvement of the device performance when compared to the LiF layer.

Original language	English (US)
Article number	063302
Journal	Applied Physics Letters
Volume	93
Issue number	6
DOIs	https://doi.org/10.1063/1.2968189
State	Published - 2008
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the NSF CAREER Grant No. DMR 0547639 and the Office of Naval Research Young Investigator Program.

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10.1063/1.2968189

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@article{628d4c8b570644f1a9eeeb661eba708e,

title = "Solution-processed small molecule-based blue light-emitting diodes using conjugated polyelectrolytes as electron injection layers",

abstract = "Organic blue light-emitting diodes were studied using the solution processable small molecule 2,7-dipyrenyl- 9,9′ -dioctyl-fluorene (DPF) as the light-emitting material. The devices were fabricated in two simple structures: indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene)- poly(styrenesulfonate) (PEDOT:PSS)/DPF/LiF/Al and ITO/PEDOT:PSS/DPF/PFN-BIm 4, where PFN-BIm4 is poly [9,9′ -bis [6″-(N,N,N -trimethylammonium)hexyl]fluorene-alt-co-phenylene] with tetrakis(imidazolyl)borate counterions. The LiF or PFN-BIm4 act as electron injection layers. The ITO/PEDOT:PSS/DPF/PFN-BIm4/Al device, in which all organic layers are cast from solution, has a turn-on voltage of 3.8 V, a luminance of 2000 cd/m2, and an efficiency of 0.6 cd/A. Using the PFN-BIm4 layer shows a significant improvement of the device performance when compared to the LiF layer.",

author = "Bright Walker and Arnold Tamayo and Jihua Yang and Brzezinski, \{Jacek Z.\} and Nguyen, \{Thuc Quyen\}",

note = "Funding Information: This work was supported by the NSF CAREER Grant No. DMR 0547639 and the Office of Naval Research Young Investigator Program. ",

year = "2008",

doi = "10.1063/1.2968189",

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volume = "93",

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AU - Walker, Bright

AU - Tamayo, Arnold

AU - Yang, Jihua

AU - Brzezinski, Jacek Z.

AU - Nguyen, Thuc Quyen

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PY - 2008

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N2 - Organic blue light-emitting diodes were studied using the solution processable small molecule 2,7-dipyrenyl- 9,9′ -dioctyl-fluorene (DPF) as the light-emitting material. The devices were fabricated in two simple structures: indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene)- poly(styrenesulfonate) (PEDOT:PSS)/DPF/LiF/Al and ITO/PEDOT:PSS/DPF/PFN-BIm 4, where PFN-BIm4 is poly [9,9′ -bis [6″-(N,N,N -trimethylammonium)hexyl]fluorene-alt-co-phenylene] with tetrakis(imidazolyl)borate counterions. The LiF or PFN-BIm4 act as electron injection layers. The ITO/PEDOT:PSS/DPF/PFN-BIm4/Al device, in which all organic layers are cast from solution, has a turn-on voltage of 3.8 V, a luminance of 2000 cd/m2, and an efficiency of 0.6 cd/A. Using the PFN-BIm4 layer shows a significant improvement of the device performance when compared to the LiF layer.

AB - Organic blue light-emitting diodes were studied using the solution processable small molecule 2,7-dipyrenyl- 9,9′ -dioctyl-fluorene (DPF) as the light-emitting material. The devices were fabricated in two simple structures: indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene)- poly(styrenesulfonate) (PEDOT:PSS)/DPF/LiF/Al and ITO/PEDOT:PSS/DPF/PFN-BIm 4, where PFN-BIm4 is poly [9,9′ -bis [6″-(N,N,N -trimethylammonium)hexyl]fluorene-alt-co-phenylene] with tetrakis(imidazolyl)borate counterions. The LiF or PFN-BIm4 act as electron injection layers. The ITO/PEDOT:PSS/DPF/PFN-BIm4/Al device, in which all organic layers are cast from solution, has a turn-on voltage of 3.8 V, a luminance of 2000 cd/m2, and an efficiency of 0.6 cd/A. Using the PFN-BIm4 layer shows a significant improvement of the device performance when compared to the LiF layer.

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Solution-processed small molecule-based blue light-emitting diodes using conjugated polyelectrolytes as electron injection layers

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