Singlet Annihilation in Films of Regioregular Poly(3-hexylthiophene): Estimates for Singlet Diffusion Lengths and the Correlation between Singlet Annihilation Rates and Spectral Relaxation

被引：87

作者：

Cook, Steffan ^{[1
]}

Han Liyuan ^{[1
]}

Furube, Akihiro ^{[2
]}

Katoh, Ryuzi ^{[2
]}

机构：

[1] Natl Inst Mat Sci, Adv Photovolta Ctr, Tsukuba, Ibaraki 3050047, Japan

[2] AIST, Act State Technol Res Grp, Tsukuba, Ibaraki 3050047, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 24期

关键词：

EXCITON-EXCITON ANNIHILATION; POLYMER SOLAR-CELLS; MEH-PPV FILMS; CONJUGATED POLYMERS; INTER-CHAIN; POLYTHIOPHENE FILMS; MOBILITY; TRANSISTORS; MORPHOLOGY; EFFICIENCY;

D O I：

10.1021/jp101340b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

For a film of regioregular poly(3-hexylthiophene) (P3HT), we calculate annihilation rates and diffusion lengths for P3HT singlet states via time-resolved emission measurements. We find that the annihilation reaction has a time-dependent annihilation constant whose value decreases by over an order of magnitude between 100 and 1000 ps and observe a correlation between the decreasing annihilation rate constant and the red shift in the P3HT emission spectrum. The onset of the annihilation regime in P3HT-where annihilation is the majority decay pathway for the P3HT singlet-occurs in P3HT at singlet densities above similar to 2 x 10(17) incident photons/cm(3), and we estimate an exciton diffusion length for P3HT singlets of 27 +/- 12 nm.

引用

页码：10962 / 10968

页数：7

共 58 条

[1] The influence of the optoelectronic properties of poly(3-alkylthiophenes) on the device parameters in flexible polymer solar cells [J].

Al-Ibrahim, M ;

Roth, HK ;

Schroedner, M ;

Konkin, A ;

Zhokhavets, U ;

Gobsch, G ;

Scharff, P ;

Sensfuss, S .

ORGANIC ELECTRONICS, 2005, 6 (02) :65-77

[2] Trap limited exciton transport in conjugated polymers [J].

Athanasopoulos, Stavros ;

Hennebicq, Emmanuelle ;

Beljonne, David ;

Walker, Alison B. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (30) :11532-11538

[3] Soluble and processable regioregular poly(3-hexylthiophene) for thin film field-effect transistor applications with high mobility [J].

Bao, Z ;

Dodabalapur, A ;

Lovinger, AJ .

APPLIED PHYSICS LETTERS, 1996, 69 (26) :4108-4110

[4] The versatile thiophene: An overview of recent research on thiophene-based materials [J].

Barbarella, G ;

Melucci, M ;

Sotgiu, G .

ADVANCED MATERIALS, 2005, 17 (13) :1581-1593

[5] Hybrid solar cells from regioregular polythiophene and ZnO nanoparticles [J].

Beek, Waldo J. E. ;

Wienk, Martijn M. ;

Janssen, Rene A. J. .

ADVANCED FUNCTIONAL MATERIALS, 2006, 16 (08) :1112-1116

[6]

Beljonne D, 2001, ADV FUNCT MATER, V11, P229, DOI 10.1002/1616-3028(200106)11:3<229::AID-ADFM229>3.0.CO

[7]

2-L

[8] Orientation of regioregular poly(3-hexylthiophene) by directional solidification: A simple method to reveal the semicrystalline structure of a conjugated polymer [J].

Brinkmann, M ;

Wittmann, JC .

ADVANCED MATERIALS, 2006, 18 (07) :860-+

[9] Effect of interchain interactions on the absorption and emission of poly(3-hexylthiophene) -: art. no. 064203 [J].

Brown, PJ ;

Thomas, DS ;

Köhler, A ;

Wilson, JS ;

Kim, JS ;

Ramsdale, CM ;

Sirringhaus, H ;

Friend, RH .

PHYSICAL REVIEW B, 2003, 67 (06)

[10] Enhanced mobility of poly(3-hexylthiophene) transistors by spin-coating from high-boiling-point solvents [J].

Chang, JF ;

Sun, BQ ;

Breiby, DW ;

Nielsen, MM ;

Sölling, TI ;

Giles, M ;

McCulloch, I ;

Sirringhaus, H .

CHEMISTRY OF MATERIALS, 2004, 16 (23) :4772-4776

← 1 2 3 4 5 6 →