White light electroluminescence in zinc sulfide: polyflourene blends

被引：14

作者：

Manoharan, SS ^{[1
]}

Mohammad, Q ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem, Mat Chem Lab, Kanpur 208016, Uttar Pradesh, India

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2005年 / 202卷 / 06期

关键词：

D O I：

10.1002/pssa.200420010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We document white light emission from ZnS:Cu-PFO blend in the device structure involving indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS)/ZnS-poly(9,9-dioctylfluorene) (PFO)/Al layers, with varying ZnS:Cu dopant concentrations in the PFO matrix. We observe that with the increase in the ZnS:Cu dopant concentration in PFO from I to 10 wt%, the turn-on-voltage shifts from 7 V to 4 V. Initial brightness of the device with 1 wt% doping is 30 cd/m(2) at 7 V and 40 cd/m(2) at 9 V. For a 10-wt% ZnS:Cu-PFO blend, luminescence up to 25 cd/m(2) at 4 V is achieved. The broad spectral feature in electroluminescence is attributed to the partial energy transfer from PFO to ZnS:Cu, due to pi-pi*, pi-pi*, and CT-(pi-pi*) transitions arising out of polyfluorene-polyfluorenone chromophores. (c) 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：1124 / 1128

页数：5

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