IMPROVED EFFICIENCY IN SEMICONDUCTING POLYMER LIGHT-EMITTING-DIODES

被引：150

作者：

BRAUN, D ^{[1
]}

HEEGER, AJ ^{[1
]}

KROEMER, H ^{[1
]}

机构：

[1] UNIV CALIF SANTA BARBARA,DEPT ELECT & COMP ENGN,SANTA BARBARA,CA 93106

来源：

JOURNAL OF ELECTRONIC MATERIALS | 1991年 / 20卷 / 11期

关键词：

BARIUM; CALCIUM; ELECTROLUMINESCENCE; INDIUM; LIGHT-EMITTING DIODE (LED); MAGNESIUM; POLY(2-METHOXY,5-(2'-ETHYL-HEXOXY)-1,4-PHENYLENE-VINYLENE); SEMICONDUCTING POLYMER;

D O I：

10.1007/BF02816037

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 [电气工程]; 0809 [电子科学与技术];

摘要：

We report visible light emission from metal-polymer diodes made from semiconducting polymers, with indium-tin oxide as the ''ohmic'' contact, and a variety of metals as the barrier metal. Our results, which confirm the discovery by the Cambridge group [Nature 347, 539 (1990)], demonstrate that light-emitting diodes can be fabricated by casting the polymer film on indium-tin oxide from solution with no subsequent polymer processing or heat treatment required. Electrical characterization reveals diode behavior with rectification ratios greater than 10(5) at sufficiently high voltages. Use of an electrode material with low work function leads to more than an order of magnitude improvement in the room-temperature efficiency of the devices. For example, the most efficient devices made with calcium as the rectifying contact display efficiencies of 0.01 photons per electron.

引用

页码：945 / 948

页数：4

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