Electrical characterization of organic light-emitting diodes using dipotassium phthalate as n -type dopant

Meng Huan Ho; Ming Ta Hsieh; Teng-Ming Chen; Jenn-Fang Chen; Shiao Wen Hwang; Chin H. Chen

doi:10.1063/1.2976139

Electrical characterization of organic light-emitting diodes using dipotassium phthalate as n -type dopant

Meng Huan Ho^*, Ming Ta Hsieh, Teng-Ming Chen, Jenn-Fang Chen, Shiao Wen Hwang, Chin H. Chen

^*Corresponding author for this work

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

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Abstract

An efficient n -doped electron transport layer composed of 4,7-diphenyl-1,10-phenanthroline (BPhen) and dipotassium phthalate (PAK2) has been developed. By temperature-dependent admittance spectroscopy, the incorporation of PAK2 into BPhen is found to raise the Fermi level from 1.7 eV to only around 0.5 eV below BPhen's lowest unoccupied molecular orbital, which further enhances the efficiency of electron injection from an Al cathode. When this n -doped layer is adopted in an organic light-emitting diode device, the green fluorescent 10-(2-benzothiazolyl)-1,1,7,7-tetramethyl-2,3,6,7-tetrahydro- 1H,5H,11H-benzo [l] -pyrano[6,7,8- ij] quinolizin-11-one do-ped device can achieve a current efficiency of 16 cdA and a power efficiency of 10.9 lmW at 1000 cd m2.

Original language	English
Article number	083505
Journal	Applied Physics Letters
Volume	93
Issue number	8
DOIs	https://doi.org/10.1063/1.2976139
State	Published - 2008

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title = "Electrical characterization of organic light-emitting diodes using dipotassium phthalate as n -type dopant",

abstract = "An efficient n -doped electron transport layer composed of 4,7-diphenyl-1,10-phenanthroline (BPhen) and dipotassium phthalate (PAK2) has been developed. By temperature-dependent admittance spectroscopy, the incorporation of PAK2 into BPhen is found to raise the Fermi level from 1.7 eV to only around 0.5 eV below BPhen's lowest unoccupied molecular orbital, which further enhances the efficiency of electron injection from an Al cathode. When this n -doped layer is adopted in an organic light-emitting diode device, the green fluorescent 10-(2-benzothiazolyl)-1,1,7,7-tetramethyl-2,3,6,7-tetrahydro- 1H,5H,11H-benzo [l] -pyrano[6,7,8- ij] quinolizin-11-one do-ped device can achieve a current efficiency of 16 cdA and a power efficiency of 10.9 lmW at 1000 cd m2.",

author = "Ho, {Meng Huan} and Hsieh, {Ming Ta} and Teng-Ming Chen and Jenn-Fang Chen and Hwang, {Shiao Wen} and Chen, {Chin H.}",

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doi = "10.1063/1.2976139",

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volume = "93",

journal = "Applied Physics Letters",

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T1 - Electrical characterization of organic light-emitting diodes using dipotassium phthalate as n -type dopant

AU - Ho, Meng Huan

AU - Hsieh, Ming Ta

AU - Chen, Teng-Ming

AU - Chen, Jenn-Fang

AU - Hwang, Shiao Wen

AU - Chen, Chin H.

PY - 2008

Y1 - 2008

N2 - An efficient n -doped electron transport layer composed of 4,7-diphenyl-1,10-phenanthroline (BPhen) and dipotassium phthalate (PAK2) has been developed. By temperature-dependent admittance spectroscopy, the incorporation of PAK2 into BPhen is found to raise the Fermi level from 1.7 eV to only around 0.5 eV below BPhen's lowest unoccupied molecular orbital, which further enhances the efficiency of electron injection from an Al cathode. When this n -doped layer is adopted in an organic light-emitting diode device, the green fluorescent 10-(2-benzothiazolyl)-1,1,7,7-tetramethyl-2,3,6,7-tetrahydro- 1H,5H,11H-benzo [l] -pyrano[6,7,8- ij] quinolizin-11-one do-ped device can achieve a current efficiency of 16 cdA and a power efficiency of 10.9 lmW at 1000 cd m2.

AB - An efficient n -doped electron transport layer composed of 4,7-diphenyl-1,10-phenanthroline (BPhen) and dipotassium phthalate (PAK2) has been developed. By temperature-dependent admittance spectroscopy, the incorporation of PAK2 into BPhen is found to raise the Fermi level from 1.7 eV to only around 0.5 eV below BPhen's lowest unoccupied molecular orbital, which further enhances the efficiency of electron injection from an Al cathode. When this n -doped layer is adopted in an organic light-emitting diode device, the green fluorescent 10-(2-benzothiazolyl)-1,1,7,7-tetramethyl-2,3,6,7-tetrahydro- 1H,5H,11H-benzo [l] -pyrano[6,7,8- ij] quinolizin-11-one do-ped device can achieve a current efficiency of 16 cdA and a power efficiency of 10.9 lmW at 1000 cd m2.

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U2 - 10.1063/1.2976139

DO - 10.1063/1.2976139

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VL - 93

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 8

M1 - 083505

ER -

Electrical characterization of organic light-emitting diodes using dipotassium phthalate as n -type dopant

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