Charge carrier transport in red electrophosphorescent emitting layer

被引：16

作者：

Matsusue, Noriyuki ^{[1
]}

Suzuki, Yuichiro ^{[1
]}

Naito, Hiroyoshi ^{[1
]}

机构：

[1] Osaka Prefecture Univ, Dept Phys & Elect, Naka Ku, Sakai, Osaka 5998531, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2006年 / 45卷 / 07期

关键词：

iridium complexes; charge carrier transport; phosphorescence; OLEDs;

D O I：

10.1143/JJAP.45.5966

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The concentration dependence of bis(2-(2 '-benzo[4,5-a]thienyl)pyridinato-NC(3'))iridium (acetylacetonate) [btP(2)Ir(acac)] in [btP(2)Ir(acac):4,4 '-N,N'-dicarbazole-biphenyl] (CBP) thin films has been studied by time-of-flight transient photocurrent measurements. It is found that electron drift mobility is dramatically decreased at low btp(2)Ir(acac) concentrations (< 1.5%) and is increased with the further addition of btp(2)Ir(acac) in btp(2)Ir(acac)-doped CBP thin films. The increase in electron drift mobility is due to electron hopping between btp(2)Ir(acac) molecules. In contrast, the hole transit signals of btp(2)Ir(acac)-doped CBP thin films were not observed.

引用

页码：5966 / 5969

页数：4

共 16 条

[11] Charge carrier transport in neat thin films of phosphorescent iridium complexes [J].

Matsusue, N ;

Suzuki, Y ;

Naito, H .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 2005, 44 (6A) :3691-3694

[12] Charge carrier transport in an emissive layer of green electrophosphorescent devices [J].

Matsusue, N ;

Ikame, S ;

Suzuki, Y ;

Naito, H .

APPLIED PHYSICS LETTERS, 2004, 85 (18) :4046-4048

[13] Photocarrier generation and bipolar transport in diphenoquinone doped polymethylphenylsilane thin films [J].

Ohsawa, Y ;

Naito, H .

JOURNAL OF APPLIED PHYSICS, 2002, 91 (01) :251-257

[14]

Pfeiffer M, 2002, ADV MATER, V14, P1633, DOI 10.1002/1521-4095(20021118)14:22<1633::AID-ADMA1633>3.0.CO

[15]

2-#

[16] Homoleptic cyclometalated iridium complexes with highly efficient red phosphorescence and application to organic light-emitting diode [J].

Tsuboyama, A ;

Iwawaki, H ;

Furugori, M ;

Mukaide, T ;

Kamatani, J ;

Igawa, S ;

Moriyama, T ;

Miura, S ;

Takiguchi, T ;

Okada, S ;

Hoshino, M ;

Ueno, K .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (42) :12971-12979

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