On the role of intermixed phases in organic photovoltaic blends

被引：156

作者：

Westacott, Paul ^{[1
,2
]}

Tumbleston, John R. ^{[3
]}

Shoaee, Safa ^{[2
,4
]}

Fearn, Sarah ^{[1
]}

Bannock, James H. ^{[2
,4
]}

Gilchrist, James B. ^{[1
,2
]}

Heutz, Sandrine ^{[1
,2
]}

deMello, John ^{[2
,4
]}

Heeney, Martin ^{[2
,4
]}

Ade, Harald ^{[3
]}

Durrant, James ^{[2
,4
]}

McPhail, David S. ^{[1
]}

Stingelin, Natalie ^{[1
,2
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London, England

[2] Univ London Imperial Coll Sci Technol & Med, Ctr Plast Elect, London, England

[3] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA

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

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2013年 / 6卷 / 09期

基金：

英国工程与自然科学研究理事会; 欧洲研究理事会;

关键词：

HETEROJUNCTION SOLAR-CELLS; TRANSIENT ABSORPTION-SPECTROSCOPY; MOLECULAR-WEIGHT; CHARGE PHOTOGENERATION; EXCITON DISSOCIATION; THIN-FILMS; PERFORMANCE; MORPHOLOGY; MISCIBILITY; POLY(3-HEXYLTHIOPHENE);

D O I：

10.1039/c3ee41821a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Recently, an intermixed phase has been identified within organic photovoltaic (OPV) bulk heterojunction (BHJ) systems that can exist in addition to relatively phase-pure regions, highlighting the need for a refined picture of the solid-state microstructure of donor-acceptor blends and for gaining further understanding of the exact nature and role such intermixed phases play in such devices. Here we manipulate the microstructure of polymer-fullerene systems via processing means and the selection of the molecular weight of the donor polymer. This manipulation is used as a tool to vary the fraction of intermixed phase present and its effects on the structure and subsequently the opto-electronic processes. We find clear relationships between the state of mixing and amount of exciton quenching and number of polarons generated per absorbed photon. Furthermore, we observe that blend systems incorporating higher molecular weight polymer result in a greater yield of dissociated polarons, likely due to the increase of the intermixed fraction.

引用

页码：2756 / 2764

页数：9

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[1] The Importance of Fullerene Percolation in the Mixed Regions of Polymer-Fullerene Bulk Heterojunction Solar Cells [J].

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Hoke, Eric T. ;

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[4] Thieno[3,2-b]thiophene-Diketopyrrolopyrrole-Containing Polymers for High-Performance Organic Field-Effect Transistors and Organic Photovoltaic Devices [J].

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Ashraf, Rap Shahid ;

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Durrant, James R. ;

Tuladhar, Pabitra Shakya ;

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Janssen, Rene A. J. ;

Anthopoulos, Thomas ;

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[6] Morphology characterization in organic and hybrid solar cells [J].

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He, Feng ;

Wang, Wei ;

Wang, Cheng ;

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Liu, Yun ;

Wen, Jianguo ;

Miller, Dean J. ;

Chen, Jihua ;

Hong, Kunlun ;

Yu, Luping ;

Darling, Seth B. .

NANO LETTERS, 2011, 11 (09) :3707-3713

[8] Highly efficient polycarbazole-based organic photovoltaic devices [J].

Chu, Ta-Ya ;

Alem, Salima ;

Verly, Pierre G. ;

Wakim, Salem ;

Lu, Jianping ;

Tao, Ye ;

Beaupre, Serge ;

Leclerc, Mario ;

Belanger, Francis ;

Desilets, Denis ;

Rodman, Sheila ;

Waller, David ;

Gaudiana, Russell .

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[10] Determining exciton bandwidth and film microstructure in polythiophene films using linear absorption spectroscopy [J].

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