Shallow and deep traps in conjugated polymers of high intrachain order

被引：85

作者：

Graupner, W ^{[1
]}

Leditzky, G ^{[1
]}

Leising, G ^{[1
]}

Scherf, U ^{[1
]}

机构：

[1] MAX PLANCK INST POLYMER RES,D-55128 MAINZ,GERMANY

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.54.7610

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present measurements of thermally stimulated currents and photoinduced absorption (PIA) in a planarized form of poly(para-phenylene). Due to the high intrachain order of the samples and their narrow distribution of effective conjugation lengths the density of states shows a very steep onset at the band gap energy. This is the prerequisite for detecting distinct trap levels and to determine their concentration and depth. We show that charges trapped at depths of 0.1 and 0.4 eV govern the observed charge transport and change in the absorption upon photoexcitation and in particular that the temperature dependence of the PLA intensity in the millisecond range reflects thermal effects on transport processes.

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页码：7610 / 7613

页数：4

相关论文

共 31 条

[1] CARRIER DEEP-TRAPPING MOBILITY-LIFETIME PRODUCTS IN POLY(P-PHENYLENE VINYLENE) [J].

ANTONIADIS, H ;

ABKOWITZ, MA ;

HSIEH, BR .

APPLIED PHYSICS LETTERS, 1994, 65 (16) :2030-2032

[2] OPTICAL-EXCITATIONS OF POLY-3-ALKYLTHIOPHENE FILMS AND SOLUTIONS [J].

BOTTA, C ;

LUZZATI, S ;

TUBINO, R ;

BORGHESI, A .

PHYSICAL REVIEW B, 1992, 46 (20) :13008-13016

[3] HIGHLY CONDUCTING POLYPARAPHENYLENE, POLYPYRROLE, AND POLYTHIOPHENE CHAINS - AN ABINITIO STUDY OF THE GEOMETRY AND ELECTRONIC-STRUCTURE MODIFICATIONS UPON DOPING [J].

BREDAS, JL ;

THEMANS, B ;

FRIPIAT, JG ;

ANDRE, JM ;

CHANCE, RR .

PHYSICAL REVIEW B, 1984, 29 (12) :6761-6773

[4] OPTICAL PROBES OF EXCITED-STATES IN POLY(P-PHENYLENEVINYLENE) - COMMENT [J].

CONWELL, EM ;

ROTHBERG, LJ ;

MIZES, HA .

PHYSICAL REVIEW LETTERS, 1994, 73 (23) :3179-3179

[5] THEORY OF THERMALLY STIMULATED CONDUCTIVITY IN A PREVIOUSLY PHOTOEXCITED CRYSTAL [J].

DUSSEL, GA ;

BUBE, RH .

PHYSICAL REVIEW, 1967, 155 (03) :764-&

[6] PHOTO-EXCITED AND DOPING-INDUCED ELECTRONIC STATES IN A POLY(PARA-PHENYLENE)-TYPE LADDER POLYMER [J].

GRAUPNER, W ;

MAURI, M ;

STAMPFL, J ;

LEISING, G ;

SCHERF, U ;

MULLEN, K .

SOLID STATE COMMUNICATIONS, 1994, 91 (01) :7-12

[7] EXCITED-STATES IN POLYMERS OF DIFFERENT DIMERIZATION [J].

GRAUPNER, W ;

MAURI, M ;

STAMPFL, J ;

UNTERWEGER, O ;

LEISING, G ;

SCHERF, U ;

MULLEN, K .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1994, 256 :431-438

[8] Femtosecond relaxation of photoexcitations in a poly(para-phenylene)-type ladder polymer [J].

Graupner, W ;

Leising, G ;

Lanzani, G ;

Nisoli, M ;

DeSilvestri, S ;

Scherf, U .

PHYSICAL REVIEW LETTERS, 1996, 76 (05) :847-850

[9] EXCITED-STATES IN PPP-TYPE LADDERPOLYMERS PROBED BY PHOTOINDUCED ABSORPTION [J].

GRAUPNER, W ;

EDER, S ;

MAURI, M ;

LEISING, G ;

SCHERF, U .

SYNTHETIC METALS, 1995, 69 (1-3) :419-422

[10] SOLUBLE SEGMENTED STEPLADDER POLY(P-PHENYLENES) FOR BLUE-LIGHT-EMITTING DIODES [J].

GREM, G ;

PAAR, C ;

STAMPFL, J ;

LEISING, G ;

HUBER, J ;

SCHERF, U .

CHEMISTRY OF MATERIALS, 1995, 7 (01) :2-4

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