Peculiarities of holes injection into organic molecular solids

被引：2

作者：

Averkiev, N. S. ^{[1
]}

Zakrevskii, V. A. ^{[1
]}

Rozhansky, I. V. ^{[1
]}

Sudar, N. T. ^{[2
]}

机构：

[1] Russian Acad Sci, AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[2] St Petersburg State Polytech Univ, St Petersburg 195251, Russia

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 23期

关键词：

charge injection; ionisation; localised states; work function; LIGHT-EMITTING-DIODES; CHARGE INJECTION; POLYETHYLENE FILMS; FIELD; CONDUCTION; POLYMER; SIMULATION; TRANSPORT; METAL;

D O I：

10.1063/1.3147858

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A microscopic mechanism of holes injection from metallic electrode into organic molecular solids (OMSs) in high electric field is proposed. A case is considered of ionization energy of the molecules exceeding work function of the metal. It is shown that the main contribution to the injection current comes from direct isoenergetic transitions (without interaction with phonons) from localized states in OMS to empty states in the metal. Strong dependence of the injection current on applied voltage originates from variation of the number of empty states available in the metal rather than by modification of the interface barrier shape.

引用

页数：3

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