Noneontact temperature measurements of organic layers in an organic light-emitting diode using wavenumber-temperature relations of raman bands

Takuro Sugiyama; Yukio Furukawa

doi:10.1143/JJAP.47.3537

Noneontact temperature measurements of organic layers in an organic light-emitting diode using wavenumber-temperature relations of raman bands

Takuro Sugiyama^*, Yukio Furukawa

^*Corresponding author for this work

School of Advanced Science and Engineering

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

10 Citations (Scopus)

Abstract

We have measured the temperatures of the organic layers in operating organic light-emitting diodes (OLEDs) by Raman spectroscopy. The wavenumbers of the Raman bands due to N, N′-di-naphthaley1-1, 1′-bipheny1-4, 4′-diamine (NPD) and copper phthalocyanine (CuPc) have been measured as a function of temperature in the range of 25-191 °C. The observed positions of strong bands around 1607 cm^-1 (NPD) and 1531 cm^-1 (CuPc) shifted downward linearly with increasing temperature in the ranges lower than 92 and 191 °C, respectively. We have determined the temperatures of the NPD and CuPc layers in an operating OLED from the wavenumber-temperature relations of these bands.

Original language	English
Pages (from-to)	3537-3539
Number of pages	3
Journal	Japanese journal of applied physics
Volume	47
Issue number	5 PART 1
DOIs	https://doi.org/10.1143/JJAP.47.3537
Publication status	Published - 2008 May 16

Keywords

Copper phthalocyanine
NPD
OLED
Raman spectroscopy
Temperature
Wavenumber

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.1143/JJAP.47.3537

Cite this

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title = "Noneontact temperature measurements of organic layers in an organic light-emitting diode using wavenumber-temperature relations of raman bands",

abstract = "We have measured the temperatures of the organic layers in operating organic light-emitting diodes (OLEDs) by Raman spectroscopy. The wavenumbers of the Raman bands due to N, N′-di-naphthaley1-1, 1′-bipheny1-4, 4′-diamine (NPD) and copper phthalocyanine (CuPc) have been measured as a function of temperature in the range of 25-191 °C. The observed positions of strong bands around 1607 cm-1 (NPD) and 1531 cm-1 (CuPc) shifted downward linearly with increasing temperature in the ranges lower than 92 and 191 °C, respectively. We have determined the temperatures of the NPD and CuPc layers in an operating OLED from the wavenumber-temperature relations of these bands.",

keywords = "Copper phthalocyanine, NPD, OLED, Raman spectroscopy, Temperature, Wavenumber",

author = "Takuro Sugiyama and Yukio Furukawa",

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language = "English",

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publisher = "Japan Society of Applied Physics",

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TY - JOUR

T1 - Noneontact temperature measurements of organic layers in an organic light-emitting diode using wavenumber-temperature relations of raman bands

AU - Sugiyama, Takuro

AU - Furukawa, Yukio

PY - 2008/5/16

Y1 - 2008/5/16

N2 - We have measured the temperatures of the organic layers in operating organic light-emitting diodes (OLEDs) by Raman spectroscopy. The wavenumbers of the Raman bands due to N, N′-di-naphthaley1-1, 1′-bipheny1-4, 4′-diamine (NPD) and copper phthalocyanine (CuPc) have been measured as a function of temperature in the range of 25-191 °C. The observed positions of strong bands around 1607 cm-1 (NPD) and 1531 cm-1 (CuPc) shifted downward linearly with increasing temperature in the ranges lower than 92 and 191 °C, respectively. We have determined the temperatures of the NPD and CuPc layers in an operating OLED from the wavenumber-temperature relations of these bands.

AB - We have measured the temperatures of the organic layers in operating organic light-emitting diodes (OLEDs) by Raman spectroscopy. The wavenumbers of the Raman bands due to N, N′-di-naphthaley1-1, 1′-bipheny1-4, 4′-diamine (NPD) and copper phthalocyanine (CuPc) have been measured as a function of temperature in the range of 25-191 °C. The observed positions of strong bands around 1607 cm-1 (NPD) and 1531 cm-1 (CuPc) shifted downward linearly with increasing temperature in the ranges lower than 92 and 191 °C, respectively. We have determined the temperatures of the NPD and CuPc layers in an operating OLED from the wavenumber-temperature relations of these bands.

KW - Copper phthalocyanine

KW - NPD

KW - OLED

KW - Raman spectroscopy

KW - Temperature

KW - Wavenumber

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JO - Japanese journal of applied physics

JF - Japanese journal of applied physics

IS - 5 PART 1

ER -

Noneontact temperature measurements of organic layers in an organic light-emitting diode using wavenumber-temperature relations of raman bands

Abstract

Keywords

ASJC Scopus subject areas

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