Interfacial chemistry of Sm with Alq3 and its implication to organic light-emitting devices

Y. Q. Li; J. X. Tang; L. S. Hung

doi:10.1016/S0009-2614(03)00961-8

Interfacial chemistry of Sm with Alq₃ and its implication to organic light-emitting devices

Y. Q. Li^*
, J. X. Tang
, L. S. Hung

^*Corresponding author for this work

City University of Hong Kong

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

21 Scopus citations

Abstract

Interfacial chemistry of samarium (Sm) with tris-(8-hydroxyquinoline) aluminum (Alq₃) has been investigated. Photoelectron analysis revealed strong interactions at the Sm-Alq₃ interface and limited Sm diffusion into Alq₃. The lowest unoccupied molecular orbital of Alq₃ was found to be 0.28 eV below the Fermi level of Sm at the Sm-Alq₃ contact, implying lacking a barrier to electron-injection from the Sm to Alq₃. Replacing Sm for MgAg as a cathode in organic electroluminescent devices considerably improved current-voltage characteristics, while the device efficiency was found to decrease by 40%. The reduction in efficiency is attributed to low optical reflectance at the Sm-Alq₃ interface.

Original language	English
Pages (from-to)	90-95
Number of pages	6
Journal	Chemical Physics Letters
Volume	376
Issue number	1-2
DOIs	https://doi.org/10.1016/S0009-2614(03)00961-8
State	Published - 17 Jul 2003
Externally published	Yes

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title = "Interfacial chemistry of Sm with Alq3 and its implication to organic light-emitting devices",

abstract = "Interfacial chemistry of samarium (Sm) with tris-(8-hydroxyquinoline) aluminum (Alq3) has been investigated. Photoelectron analysis revealed strong interactions at the Sm-Alq3 interface and limited Sm diffusion into Alq3. The lowest unoccupied molecular orbital of Alq3 was found to be 0.28 eV below the Fermi level of Sm at the Sm-Alq3 contact, implying lacking a barrier to electron-injection from the Sm to Alq3. Replacing Sm for MgAg as a cathode in organic electroluminescent devices considerably improved current-voltage characteristics, while the device efficiency was found to decrease by 40\%. The reduction in efficiency is attributed to low optical reflectance at the Sm-Alq3 interface.",

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T1 - Interfacial chemistry of Sm with Alq3 and its implication to organic light-emitting devices

AU - Li, Y. Q.

AU - Tang, J. X.

AU - Hung, L. S.

PY - 2003/7/17

Y1 - 2003/7/17

N2 - Interfacial chemistry of samarium (Sm) with tris-(8-hydroxyquinoline) aluminum (Alq3) has been investigated. Photoelectron analysis revealed strong interactions at the Sm-Alq3 interface and limited Sm diffusion into Alq3. The lowest unoccupied molecular orbital of Alq3 was found to be 0.28 eV below the Fermi level of Sm at the Sm-Alq3 contact, implying lacking a barrier to electron-injection from the Sm to Alq3. Replacing Sm for MgAg as a cathode in organic electroluminescent devices considerably improved current-voltage characteristics, while the device efficiency was found to decrease by 40%. The reduction in efficiency is attributed to low optical reflectance at the Sm-Alq3 interface.

AB - Interfacial chemistry of samarium (Sm) with tris-(8-hydroxyquinoline) aluminum (Alq3) has been investigated. Photoelectron analysis revealed strong interactions at the Sm-Alq3 interface and limited Sm diffusion into Alq3. The lowest unoccupied molecular orbital of Alq3 was found to be 0.28 eV below the Fermi level of Sm at the Sm-Alq3 contact, implying lacking a barrier to electron-injection from the Sm to Alq3. Replacing Sm for MgAg as a cathode in organic electroluminescent devices considerably improved current-voltage characteristics, while the device efficiency was found to decrease by 40%. The reduction in efficiency is attributed to low optical reflectance at the Sm-Alq3 interface.

UR - https://www.scopus.com/pages/publications/0037765196

U2 - 10.1016/S0009-2614(03)00961-8

DO - 10.1016/S0009-2614(03)00961-8

M3 - 文章

AN - SCOPUS:0037765196

SN - 0009-2614

VL - 376

SP - 90

EP - 95

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-2

ER -

Interfacial chemistry of Sm with Alq₃ and its implication to organic light-emitting devices

Abstract

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