Influence of nanoscale phase separation on geminate versus bimolecular recombination in P3HT:fullerene blend films

被引：58

作者：

Shoaee, Safa ^{[1
]}

Eng, Mattias P. ^{[1
]}

Espildora, Eva ^{[2
]}

Luis Delgado, Juan ^{[2
,3
]}

Campo, Bert ^{[4
]}

Martin, Nazario ^{[2
,3
]}

Vanderzande, Dirk ^{[4
]}

Durrant, James R. ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England

[2] Univ Complutense, Fac Quim, Dept Quim Organ, E-28040 Madrid, Spain

[3] Fac Ciencias, IMDEA Nanociencia, E-28049 Madrid, Spain

[4] Univ Hasselt, Inst Mat Res, Div Chem, BE-3590 Diepenbeek, Belgium

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2010年 / 3卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

SOLAR-CELLS; POLYMER; MORPHOLOGY; PHOTODIODES; PERFORMANCE; GENERATION; TRANSPORT; NETWORK; PCBM;

D O I：

10.1039/c003394d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, we compare the charge recombination dynamics observed in films comprising poly(3-hexylthiophene) blended with three fullerene derivatives: PCBM and two alternative pyrazolinofullerenes. Transient absorption data indicate that replacement of PCBM with either of the pyrazolinofullerene derivatives results in a transition from bimolecular to monomolecular (geminate) recombination dynamics. We show that this transition cannot be explained by a difference in interfacial energetics. However, this transition does correlate with nanomorphology data which indicate that both pyrazolinofullerenes yield a much finer phase segregation, with correspondingly smaller domain sizes, than observed with PCBM. Our results therefore provide clear evidence of the role of nanomorphology in determining the nature of recombination dynamics in such donor/acceptor blends.

引用

页码：971 / 976

页数：6

共 40 条

[21] Scanning near-field and confocal Raman microscopic investigation of P3HT-PCBM systems for solar cell applications [J].

Klimov, E. ;

Li, W. ;

Yang, X. ;

Hoffmann, G. G. ;

Loos, J. .

MACROMOLECULES, 2006, 39 (13) :4493-4496

[22] Photoexcitation dynamics in regioregular and regiorandom polythiophene films -: art. no. 235122 [J].

Korovyanko, OJ ;

Österbacka, R ;

Jiang, XM ;

Vardeny, ZV ;

Janssen, RAJ .

PHYSICAL REVIEW B, 2001, 64 (23)

[23] Thermally stable, efficient polymer solar cells with nanoscale control of the interpenetrating network morphology [J].

Ma, WL ;

Yang, CY ;

Gong, X ;

Lee, K ;

Heeger, AJ .

ADVANCED FUNCTIONAL MATERIALS, 2005, 15 (10) :1617-1622

[24] Nanostructured organic pn junctions towards 3D photovoltaics [J].

Martens, T ;

Munters, T ;

Goris, L ;

D'Haen, J ;

Schouteden, K ;

D'Olieslaeger, M ;

Lutsen, L ;

Vanderzande, D ;

Geens, W ;

Poortmans, J ;

De Schepper, L ;

Manca, JV .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2004, 79 (01) :27-30

[25] Charge transport and photocurrent generation in poly (3-hexylthiophene): Methanofullerene bulk-heterojunction solar cells [J].

Mihailetchi, VD ;

Xie, HX ;

de Boer, B ;

Koster, LJA ;

Blom, PWM .

ADVANCED FUNCTIONAL MATERIALS, 2006, 16 (05) :699-708

[26] Compositional dependence of the performance of poly(p-phenylene vinylene):: Methanofullerene bulk-heterojunction solar cells [J].

Mihailetchi, VD ;

Koster, LJA ;

Blom, PWM ;

Melzer, C ;

de Boer, B ;

van Duren, JKJ ;

Janssen, RAJ .

ADVANCED FUNCTIONAL MATERIALS, 2005, 15 (05) :795-801

[27]

MORTEANI AC, 2004, PHYS REV LETT, V92, P24

[28] Binary organic photovoltaic blends:: A simple rationale for optimum compositions [J].

Mueller, Christian ;

Ferenczi, Toby A. M. ;

Campoy-Quiles, Mariano ;

Frost, Jarvist M. ;

Bradley, Donal D. C. ;

Smith, Paul ;

Stingelin-Stutzmann, Natalie ;

Nelson, Jenny .

ADVANCED MATERIALS, 2008, 20 (18) :3510-+

[29] Ultrafast dynamics of charge carrier photogeneration and geminate recombination in conjugated polymer: fullerene solar cells -: art. no. 195208 [J].

Müller, JG ;

Lupton, JM ;

Feldmann, J ;

Lemmer, U ;

Scharber, MC ;

Sariciftci, NS ;

Brabec, CJ ;

Scherf, U .

PHYSICAL REVIEW B, 2005, 72 (19)

[30] Diffusion-limited recombination in polymer-fullerene blends and its influence on photocurrent collection [J].

Nelson, J .

PHYSICAL REVIEW B, 2003, 67 (15)

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