Ultrafast field-induced decay of singlet excited-state in conjugated polymers

被引：0

作者：

Cheng, P. ^{[1
]}

Yang, J-P ^{[1
]}

机构：

[1] Hefei Univ Technol, Sch Elect Sci & Appl Phys, Hefei 230009, Anhui, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2010年 / 405卷 / 11期

关键词：

Poly(phenylenevinylene) (PPV); Ultrafast spectroscopy; Exciton; Organic light emission diode; INDUCED DISSOCIATION;

D O I：

10.1016/j.physb.2009.10.034

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

An ultrafast pump - probe spectroscopy was used to investigate the transient phenomena of the excitons induced by the electric field to gain an insight Into the effect of electric field on the organic light emission diode At high excitation density of 230 mu J/cm(2) the decay of the singlet excitons showed fast and slow components The amplitude factor and the relaxation time of the fast component are field-dependent The slow component is field-independent and its relaxation time-constant is about 890 ps We also observed the longitudinal acoustic phonons with sound velocity of 17 A/ps generated by excitation pulse (C) 2009 Elsevier B V All rights reserved

引用

页码：S384 / S386

页数：3

共 12 条

[1] FIELD-INDUCED EXCITON BREAKING IN CONJUGATED POLYMERS [J].

ARKHIPOV, VI ;

BASSLER, H ;

DEUSSEN, M ;

GOBEL, EO ;

KERSTING, R ;

KURZ, H ;

LEMMER, U ;

MAHRT, RF .

PHYSICAL REVIEW B, 1995, 52 (07) :4932-4940

[2]

Bassler H, 1997, PRIMARY PHOTOEXCITATIONS IN CONJUGATED POLYMERS, P51

[3]

GARDERMAIER C, 2008, PHYS REV LETT, V100

[4] SYNTHESIS, ELECTRICAL-CONDUCTIVITY AND ELECTROLUMINESCENCE OF POLY(P-PHENYLENE VINYLENE) PREPARED BY THE PRECURSOR ROUTE [J].

GMEINER, J ;

KARG, S ;

MEIER, M ;

RIESS, W ;

STROHRIEGL, P ;

SCHWOERER, M .

ACTA POLYMERICA, 1993, 44 (04) :201-205

[5] Exciton-exciton annihilation in poly(p-phenylenevinylene) films [J].

Kepler, RG ;

Valencia, VS ;

Jacobs, SJ ;

McNamara, JJ .

SYNTHETIC METALS, 1996, 78 (03) :227-230

[6] ULTRAFAST FIELD-INDUCED DISSOCIATION OF EXCITONS IN CONJUGATED POLYMERS [J].

KERSTING, R ;

LEMMER, U ;

DEUSSEN, M ;

BAKKER, HJ ;

MAHRT, RF ;

KURZ, H ;

ARKHIPOV, VI ;

BASSLER, H ;

GOBEL, EO .

PHYSICAL REVIEW LETTERS, 1994, 73 (10) :1440-1443

[7]

McBranch DW, 1997, PRIMARY PHOTOEXCITATIONS IN CONJUGATED POLYMERS, P587

[8] Exciton dissociation in tris(2-phenylpyridine) iridium (III) probed by electric field-assisted time-resolved photoluminescence [J].

Mezyk, J. ;

Meinardi, F. ;

Tubino, R. ;

Cocchi, M. .

APPLIED PHYSICS LETTERS, 2008, 93 (09)

[9] Ultrafast field-induced dissociation of excitons in a conjugated porphyrin polymer [J].

OKeefe, GE ;

Halls, JJM ;

Walsh, CA ;

Denton, GJ ;

Friend, RH ;

Anderson, HL .

CHEMICAL PHYSICS LETTERS, 1997, 276 (1-2) :78-83

[10]

SHKONOV MN, 1999, SYNTHETIC MET, V102, P1118

← 1 2 →