Extrinsic electron traps in tris(8-hydroxyquinoline) aluminium

Honhang Fong; Kachu Lun; Shu Kong SO

doi:10.1143/jjap.41.l1122

Extrinsic electron traps in tris(8-hydroxyquinoline) aluminium

Honhang Fong, Kachu Lun, Shu Kong SO^*

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Journal article › peer-review

41 Citations (Scopus)

Abstract

Optical time-of-flight (TOF) technique was used to measure the electron mobility of tris(8-hydroxyquinoline) aluminum (Alq₃) exposed to different gases. When freshly prepared Alq₃ sample was exposed to air, the TOF signal was observed to be highly dispersive. After annealing the sample to 370 K for 12 h, the signal became non-dispersive. The field dependence of the electron mobility was found to exhibit Poole-Frenkel form between 250-380 K. The effects of various ambient gases (N₂, O₂, H₂O) to the electron mobility were examined. It is found that O₂ acts as an extrinsic dopant and induces electron traps in bulk Alq₃.

Original language	English
Pages (from-to)	L1122-L1125
Number of pages	4
Journal	Japanese Journal of Applied Physics
Volume	41
Issue number	10 A
DOIs	https://doi.org/10.1143/jjap.41.l1122
Publication status	Published - 1 Oct 2002

Scopus Subject Areas

General Engineering
Physics and Astronomy (miscellaneous)
General Physics and Astronomy

User-Defined Keywords

Carrier mobility
Hydroxyquinoline aluminum
Organic transporting materials

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10.1143/jjap.41.l1122

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title = "Extrinsic electron traps in tris(8-hydroxyquinoline) aluminium",

abstract = "Optical time-of-flight (TOF) technique was used to measure the electron mobility of tris(8-hydroxyquinoline) aluminum (Alq3) exposed to different gases. When freshly prepared Alq3 sample was exposed to air, the TOF signal was observed to be highly dispersive. After annealing the sample to 370 K for 12 h, the signal became non-dispersive. The field dependence of the electron mobility was found to exhibit Poole-Frenkel form between 250-380 K. The effects of various ambient gases (N2, O2, H2O) to the electron mobility were examined. It is found that O2 acts as an extrinsic dopant and induces electron traps in bulk Alq3.",

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T1 - Extrinsic electron traps in tris(8-hydroxyquinoline) aluminium

AU - Fong, Honhang

AU - Lun, Kachu

AU - SO, Shu Kong

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Y1 - 2002/10/1

N2 - Optical time-of-flight (TOF) technique was used to measure the electron mobility of tris(8-hydroxyquinoline) aluminum (Alq3) exposed to different gases. When freshly prepared Alq3 sample was exposed to air, the TOF signal was observed to be highly dispersive. After annealing the sample to 370 K for 12 h, the signal became non-dispersive. The field dependence of the electron mobility was found to exhibit Poole-Frenkel form between 250-380 K. The effects of various ambient gases (N2, O2, H2O) to the electron mobility were examined. It is found that O2 acts as an extrinsic dopant and induces electron traps in bulk Alq3.

AB - Optical time-of-flight (TOF) technique was used to measure the electron mobility of tris(8-hydroxyquinoline) aluminum (Alq3) exposed to different gases. When freshly prepared Alq3 sample was exposed to air, the TOF signal was observed to be highly dispersive. After annealing the sample to 370 K for 12 h, the signal became non-dispersive. The field dependence of the electron mobility was found to exhibit Poole-Frenkel form between 250-380 K. The effects of various ambient gases (N2, O2, H2O) to the electron mobility were examined. It is found that O2 acts as an extrinsic dopant and induces electron traps in bulk Alq3.

KW - Carrier mobility

KW - Hydroxyquinoline aluminum

KW - Organic transporting materials

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DO - 10.1143/jjap.41.l1122

M3 - Journal article

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SP - L1122-L1125

JO - Japanese Journal of Applied Physics

JF - Japanese Journal of Applied Physics

IS - 10 A

ER -

Extrinsic electron traps in tris(8-hydroxyquinoline) aluminium

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