Very high-efficiency green organic light-emitting devices based on electrophosphorescence

被引：2716

作者：

Baldo, MA ^{[1
]}

Lamansky, S

Burrows, PE

Thompson, ME

Forrest, SR

机构：

[1] Princeton Univ, Ctr Photon & Optoelect Mat POEM, Dept Elect Engn, Princeton, NJ 08544 USA

[2] Princeton Univ, Princeton Mat Inst, Princeton, NJ 08544 USA

[3] Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA

来源：

APPLIED PHYSICS LETTERS | 1999年 / 75卷 / 01期

关键词：

D O I：

10.1063/1.124258

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We describe the performance of an organic light-emitting device employing the green electrophosphorescent material, fac tris(2-phenylpyridine) iridium [Ir(ppy)(3)] doped into a 4,4(')-N,N-'-dicarbazole-biphenyl host. These devices exhibit peak external quantum and power efficiencies of 8.0% (28 cd/A) and 31 lm/W, respectively. At 100 cd/m(2), the external quantum and power efficiencies are 7.5% (26 cd/A) and 19 lm/W at an operating voltage of 4.3 V. This performance can be explained by efficient transfer of both singlet and triplet excited states in the host to Ir(ppy)(3), leading to a high internal efficiency. In addition, the short phosphorescent decay time of Ir(ppy)(3) (< 1 mu s) reduces saturation of the phosphor at high drive currents, yielding a peak luminance of 100 000 cd/m(2). (C) 1999 American Institute of Physics. [S0003-6951(99)00127-8].

引用

页码：4 / 6

页数：3

共 20 条

[11] Highly efficient and bright organic electroluminescent devices with an aluminum cathode [J].

Jabbour, GE ;

Kawabe, Y ;

Shaheen, SE ;

Wang, JF ;

Morrell, MM ;

Kippelen, B ;

Peyghambarian, N .

APPLIED PHYSICS LETTERS, 1997, 71 (13) :1762-1764

[12]

Kanai H., 1997, INT C EL MOL MAT REL

[13] Fabrication of highly efficient organic electroluminescent devices [J].

Kido, J ;

Iizumi, Y .

APPLIED PHYSICS LETTERS, 1998, 73 (19) :2721-2723

[14]

KIJIMA Y, 1998, SPRING MRS

[15] EXCITED-STATE PROPERTIES OF A TRIPLY ORTHO-METALATED IRIDIUM(III) COMPLEX [J].

KING, KA ;

SPELLANE, PJ ;

WATTS, RJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1985, 107 (05) :1431-1432

[16]

KIPPELEN B, 1999, SPRING MRS

[17] Optically pumped blue organic semiconductor lasers [J].

Kozlov, VG ;

Parthasarathy, G ;

Burrows, PE ;

Forrest, SR ;

You, Y ;

Thompson, ME .

APPLIED PHYSICS LETTERS, 1998, 72 (02) :144-146

[18] Improved energy transfer in electrophosphorescent devices [J].

O'Brien, DF ;

Baldo, MA ;

Thompson, ME ;

Forrest, SR .

APPLIED PHYSICS LETTERS, 1999, 74 (03) :442-444

[19]

VANDERDONCKT E, 1994, B SOC CHIM BELG, V103, P207

[20]

VANSLYKE SA, 1985, Patent No. 4539507

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