Measurement of photoluminescence efficiency of Ir(III) phenylpyridine derivatives in solution and solid-state films

被引：131

作者：

Endo, Ayataka ^{[1
,2
]}

Suzuki, Kengo ^{[3
]}

Yoshihara, Toshitada ^{[4
]}

Tobita, Seiji ^{[4
]}

Yahiro, Masayuki ^{[1
,2
]}

Adachi, Chihaya ^{[1
,2
]}

机构：

[1] Kyushu Univ, Ctr Future Chem, Fukuoka 8190395, Japan

[2] Japan Sci & Technol Agcy, Crest Program, Tokyo 1500011, Japan

[3] Hamamatsu Photon KK, Shizuoka 4313196, Japan

[4] Gunma Univ, Dept Chem, Gunma 3768515, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2008年 / 460卷 / 1-3期

关键词：

D O I：

10.1016/j.cplett.2008.05.064

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We compared the photoluminescence efficiency (Phi(PL)) of fac-tris(2-phenylpyridine) iridium (Ir(ppy)(3)) and derivatives of it in solution and in doped solid-state films and estimated their radiative and nonradiative decay rates. The green phosphor of Ir(ppy)(3) and blue phosphors of FIrpic, Ir(Fppy)(3), FIr6 showed high Phi(PL) values approaching to 100% in both solution and doped solid-state films. On the other hand, the red phosphor of Btp(2)Ir(acac) showed lower Phi(PL) value less than 40% in both environments. Photoacoustic spectroscopy results indicated that for Btp(2)Ir(acac) nonradiative decay from the triplet state to the ground states is 64 +/- 8%. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：155 / 157

页数：3

共 20 条

[1] High-efficiency red electrophosphorescence devices [J].

Adachi, C ;

Baldo, MA ;

Forrest, SR ;

Lamansky, S ;

Thompson, ME ;

Kwong, RC .

APPLIED PHYSICS LETTERS, 2001, 78 (11) :1622-1624

[2] Nearly 100% internal phosphorescence efficiency in an organic light-emitting device [J].

Adachi, C ;

Baldo, MA ;

Thompson, ME ;

Forrest, SR .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (10) :5048-5051

[3] Endothermic energy transfer: A mechanism for generating very efficient high-energy phosphorescent emission in organic materials [J].

Adachi, C ;

Kwong, RC ;

Djurovich, P ;

Adamovich, V ;

Baldo, MA ;

Thompson, ME ;

Forrest, SR .

APPLIED PHYSICS LETTERS, 2001, 79 (13) :2082-2084

[4] High-efficiency organic electrophosphorescent devices with tris(2-phenylpyridine)iridium doped into electron-transporting materials [J].

Adachi, C ;

Baldo, MA ;

Forrest, SR ;

Thompson, ME .

APPLIED PHYSICS LETTERS, 2000, 77 (06) :904-906

[5] Very high-efficiency green organic light-emitting devices based on electrophosphorescence [J].

Baldo, MA ;

Lamansky, S ;

Burrows, PE ;

Thompson, ME ;

Forrest, SR .

APPLIED PHYSICS LETTERS, 1999, 75 (01) :4-6

[6] Highly efficient phosphorescent emission from organic electroluminescent devices [J].

Baldo, MA ;

O'Brien, DF ;

You, Y ;

Shoustikov, A ;

Sibley, S ;

Thompson, ME ;

Forrest, SR .

NATURE, 1998, 395 (6698) :151-154

[7] TIME-RESOLVED PHOTOTHERMAL AND PHOTOACOUSTIC METHODS APPLIED TO PHOTOINDUCED PROCESSES IN SOLUTION [J].

BRASLAVSKY, SE ;

HEIBEL, GE .

CHEMICAL REVIEWS, 1992, 92 (06) :1381-1410

[8] REFERENCE MATERIALS FOR FLUORESCENCE MEASUREMENT [J].

EATON, DF .

PURE AND APPLIED CHEMISTRY, 1988, 60 (07) :1107-1114

[9] Phosphorescence dynamics and spin-lattice relaxation of the OLED emitter Ir(btp)2(acac) [J].

Finkenzeller, Walter J. ;

Thompson, Mark E. ;

Yersin, Hartmut .

CHEMICAL PHYSICS LETTERS, 2007, 444 (4-6) :273-279

[10] Triplet state properties of the OLED emitter Ir(btp)2(acac):: Characterization by site-selective spectroscopy and application of high magnetic fields [J].

Finkenzeller, Walter J. ;

Hofbeck, Thomas ;

Thompson, Mark E. ;

Yersin, Hartmut .

INORGANIC CHEMISTRY, 2007, 46 (12) :5076-5083

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