Impedance spectroscopy of single- and double-layer polymer light-emitting diode

被引：104

作者：

Kim, SH ^{[1
]}

Choi, KH ^{[1
]}

Lee, HM ^{[1
]}

Hwang, DH ^{[1
]}

Do, LM ^{[1
]}

Chu, HY ^{[1
]}

Zyung, T ^{[1
]}

机构：

[1] Elect & Telecommun Res Inst, Taejon 305350, South Korea

来源：

JOURNAL OF APPLIED PHYSICS | 2000年 / 87卷 / 02期

关键词：

D O I：

10.1063/1.371956

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

ac electrical properties of the heterostructured polymer light-emitting diode consisting of poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylenevinylene] (MEH-PPV) and sodium sulfonated polystyrene (SSPS) ionomer are studied. It is found that the carrier in SSPS is not the ion but the electron, and the conduction mechanism seems to be a space-charge limited current with exponential trap distribution. Based on the results of the impedance analysis, we propose a microscopic model to explain the enhancement of the electroluminescence efficiency of the indium tin oxide/MEH-PPV/SSPS/Al structure. (C) 2000 American Institute of Physics. [S0021-8979(00)01602-9].

引用

页码：882 / 888

页数：7

共 20 条

[1] VISIBLE-LIGHT EMISSION FROM SEMICONDUCTING POLYMER DIODES [J].

BRAUN, D ;

HEEGER, AJ .

APPLIED PHYSICS LETTERS, 1991, 58 (18) :1982-1984

[2] LIGHT-EMITTING-DIODES BASED ON CONJUGATED POLYMERS [J].

BURROUGHES, JH ;

BRADLEY, DDC ;

BROWN, AR ;

MARKS, RN ;

MACKAY, K ;

FRIEND, RH ;

BURN, PL ;

HOLMES, AB .

NATURE, 1990, 347 (6293) :539-541

[3] Space-charge limited conduction with traps in poly(phenylene vinylene) light emitting diodes [J].

Campbell, AJ ;

Bradley, DDC ;

Lidzey, DG .

JOURNAL OF APPLIED PHYSICS, 1997, 82 (12) :6326-6342

[4] Capacitance measurements of junction formation and structure in polymer light-emitting electrochemical cells [J].

Campbell, IH ;

Smith, DL ;

Neef, CJ ;

Ferraris, JP .

APPLIED PHYSICS LETTERS, 1998, 72 (20) :2565-2567

[5] ELECTRICAL-IMPEDANCE MEASUREMENTS OF POLYMER LIGHT-EMITTING-DIODES [J].

CAMPBELL, IH ;

SMITH, DL ;

FERRARIS, JP .

APPLIED PHYSICS LETTERS, 1995, 66 (22) :3030-3032

[6] THE RANDOM FREE-ENERGY BARRIER MODEL FOR AC CONDUCTION IN DISORDERED SOLIDS [J].

DYRE, JC .

JOURNAL OF APPLIED PHYSICS, 1988, 64 (05) :2456-2468

[7]

GRANDY B, 1997, IONOMERS, pCH2

[8] TRANSPORT IN IONIC CONDUCTING GLASSES [J].

HUNT, A .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1991, 3 (40) :7831-7842

[9]

JONSCHER AK, 1983, DIELECTRIC RELAXATIO, P85

[10] Study of frequency dependent ε*(ω) in amorphous ferroelectrics:: Modified generalized Langevin equation analysis [J].

Kim, SH ;

Hwang, YH ;

Kim, JA ;

Yang, YS ;

Chae, BG ;

Jang, MS .

JOURNAL OF APPLIED PHYSICS, 1999, 85 (01) :347-351

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