Dramatic efficiency improvement in phosphorescent organic light-emitting diodes with ultraviolet-ozone treated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)

被引：32

作者：

Benor, Amare ^{[1
]}

Takizawa, Shin-ya ^{[1
]}

Chen, Ping ^{[1
]}

Perez-Bolivar, Cesar ^{[1
]}

Anzenbacher, Pavel, Jr. ^{[1
]}

机构：

[1] Bowling Green State Univ, Ctr Photochem Sci, Bowling Green, OH 43403 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 19期

关键词：

charge injection; excitons; organic light emitting diodes; organic semiconductors; phosphorescence; polymer films; semiconductor thin films; work function; CONDUCTIVITY ENHANCEMENT; EMISSION; DEVICES;

D O I：

10.1063/1.3132059

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The treatment of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films by ultraviolet (UV) light-ozone to improve device efficiency was investigated utilizing two simple phosphorescent organic light-emitting diodes (PHOLEDs) architectures. The maximum external quantum efficiency in the first device increased from 3.5% for the untreated anode to 10.5%, while in the second device comprising an exciton blocking layer increased from 15.8% to 18.5%. The time dependence of the UV-ozone treatment on the performance was studied. The dramatic improvement in the PHOLED performance is attributed to the change in the PEDOT:PSS work function and more balanced charge injection, suggesting promising easy-to-do method to improve PHOLED performance.

引用

页数：3

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