Ultrafast Dynamics of Carrier Mobility in a Conjugated Polymer Probed at Molecular and Microscopic Length Scales

被引：86

作者：

Devizis, A. ^{[1
]}

Serbenta, A. ^{[1
]}

Meerholz, K. ^{[2
]}

Hertel, D. ^{[2
]}

Gulbinas, V. ^{[1
]}

机构：

[1] Lithuania Acad Sci, Inst Phys, LT-232600 Vilnius, Lithuania

[2] Univ Cologne, Dept Chem, D-50939 Cologne, Germany

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 02期

关键词：

GENERATION;

D O I：

10.1103/PhysRevLett.103.027404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We used time-resolved electric-field-induced second-harmonic generation to probe the charge-carrier-mobility dynamics in amorphous organic materials on an ultrafast time scale. We were able to show that the mobility in poly-spiro-bifluorene-co-benzothiadiazol decreases from 0.1 cm(2)/V s at 1 ps to 10(-6) cm(2)/V s within 1 mu s. We attribute this dramatic decrease to the relaxation of the charge carriers within the density of states, clearly demonstrating the impact of disorder on the nanoscale charge transport in amorphous semiconductors.

引用

页数：4

共 24 条

[1] 2ND-ORDER POLARIZABILITIES OF NITROPYRIDINE DERIVATIVES DETERMINED WITH ELECTRIC-FIELD-INDUCED 2ND-HARMONIC GENERATION AND A SOLVATOCHROMIC METHOD - A COMPARATIVE-STUDY [J].

BOSSHARD, C ;

KNOPFLE, G ;

PRETRE, P ;

GUNTER, P .

JOURNAL OF APPLIED PHYSICS, 1992, 71 (04) :1594-1605

[2] General observation of n-type field-effect behaviour in organic semiconductors [J].

Chua, LL ;

Zaumseil, J ;

Chang, JF ;

Ou, ECW ;

Ho, PKH ;

Sirringhaus, H ;

Friend, RH .

NATURE, 2005, 434 (7030) :194-199

[3] Charge transport in organic semiconductors [J].

Coropceanu, Veaceslav ;

Cornil, Jerome ;

da Silva Filho, Demetrio A. ;

Olivier, Yoann ;

Silbey, Robert ;

Bredas, Jean-Luc .

CHEMICAL REVIEWS, 2007, 107 (04) :926-952

[4]

DEVIZIS A, IN PRESS

[5] Macroscopic coherence of a single exciton state in an organic quantum wire [J].

Dubin, F ;

Melet, R ;

Barisien, T ;

Grousson, R ;

Legrand, L ;

Schott, M ;

Voliotis, V .

NATURE PHYSICS, 2006, 2 (01) :32-35

[6]

*EPAPS, EPRLTAO103022930 EPA

[7] Nondispersive polaron transport in disordered organic solids -: art. no. 224303 [J].

Fishchuk, II ;

Kadashchuk, A ;

Bässler, H ;

Nespurek, S .

PHYSICAL REVIEW B, 2003, 67 (22)

[8] Ultrafast dynamics of interfacial electric fields in semiconductor heterostructures monitored by pump-probe second-harmonic generation [J].

Glinka, YD ;

Shahbazyan, TV ;

Perakis, IE ;

Tolk, NH ;

Liu, X ;

Sasaki, Y ;

Furdyna, JK .

APPLIED PHYSICS LETTERS, 2002, 81 (20) :3717-3719

[9] Direct observation of ultrafast field-induced charge generation in ladder-type poly(para-phenylene) [J].

Graupner, W ;

Cerullo, G ;

Lanzani, G ;

Nisoli, M ;

List, EJW ;

Leising, G ;

De Silvestri, S .

PHYSICAL REVIEW LETTERS, 1998, 81 (15) :3259-3262

[10] Dynamic Stark effect as a probe of the evolution of geminate electron-hole pairs in a conjugated polymer -: art. no. 233203 [J].

Gulbinas, V ;

Kananavicius, R ;

Valkunas, L ;

Bässler, H .

PHYSICAL REVIEW B, 2002, 66 (23) :1-4

← 1 2 3 →