Space-charge-limited hole current in poly(9,9-dioctylfluorene) diodes

被引：85

作者：

Nicolai, H. T. ^{[1
]}

Wetzelaer, G. A. H. ^{[1
]}

Kuik, M. ^{[1
]}

Kronemeijer, A. J. ^{[1
]}

de Boer, B. ^{[1
]}

Blom, P. W. M. ^{[1
]}

机构：

[1] Univ Groningen, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 17期

关键词：

hole mobility; ionisation; molybdenum compounds; ohmic contacts; organic light emitting diodes; polymers; space charge; time of flight spectra; LIGHT-EMITTING-DIODES; MOLYBDENUM TRIOXIDE; METAL-OXIDES; INJECTION; LAYER; POLYFLUORENE; ELECTRODES; EFFICIENCY; TRANSPORT; POLYMERS;

D O I：

10.1063/1.3391668

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Characterization of the hole transport in blue-emitting polymers as poly(9,9-dioctylfluorene) (PFO) is strongly hindered by their large ionization potential of similar to 6 eV. Using common anodes as poly(3,4-ethylenedioxythiophene)/poly(styrenesulphonic acid) leads to a strongly injection limited current. We demonstrate that molybdenum trioxide forms an Ohmic hole contact on PFO, enabling the observation of a space-charge-limited current(SCLC). This allows a direct determination of the hole mobility PFO of 1.3x10(-9) m(2)/V s at room temperature, in good agreement with previously reported mobility values determined by time-of-flight measurements.

引用

页数：3

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