QUANTUM EFFICIENCIES OF ELECTROLUMINESCENT POLY(PARA-PHENYLENES)

被引：155

作者：

STAMPF, J ^{[1
]}

TASCH, S ^{[1
]}

LEISING, G ^{[1
]}

SCHERF, U ^{[1
]}

机构：

[1] MAX PLANCK INST POLYMER RES,D-55128 MAINZ,GERMANY

来源：

SYNTHETIC METALS | 1995年 / 71卷 / 1-3期

关键词：

D O I：

10.1016/0379-6779(94)03195-C

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Poly(para-phenylene) (PPP) and its derivatives with their band-gap corresponding to blue light have shown to be suitable as active layers in Light Emitting Diodes (LEDs). One important factor for the efficieny of these devices is the photoluminescence quantum yield of the active layer. Intermolecular effects in the layers (excitation energy transfer (EET), self-quenching and excimer-formation) lead to a decreased quantum yield in solid state compared to solutions. We investigated the photoluminescence quantum yields of para-hexaphenyl and several PPP-type ladderpolymers in solution and solid state. We report on the measured quantum yields (up to 85% in solution and 30% in solid state) and discuss the occuring quenching mechanisms.

引用

页码：2125 / 2128

页数：4

共 25 条

[1]

BOJARSKI C, 1990, PHOTOCHEMISTRY PHOTO

[2] PHOTOPHYSICAL PROPERTIES OF TETRACENE DERIVATIVES IN SOLUTION .3. THERMALLY ACTIVATED NONRADIATIVE PROCESSES AND TRIPLET-STATE PROPERTIES [J].