Enhancement of organic photovoltaic device performance via P3HT:PCBM solution heat treatment

被引:18
作者
Otieno, Francis [1 ,5 ]
Mutuma, Bridget K. [2 ,3 ,4 ]
Airo, Mildred [3 ,4 ]
Ranganathan, Kamalakannan [2 ,3 ,4 ]
Erasmus, Rudolph [1 ,5 ]
Coville, Neil [2 ,3 ,4 ]
Wamwangi, Daniel [1 ,5 ]
机构
[1] Univ Witwatersrand, Sch Phys, Mat Phys Res Inst, ZA-2050 Johannesburg, South Africa
[2] Univ Witwatersrand, Sch Chem, Inst Mol Sci, Private Bag 3, Johannesburg, South Africa
[3] Univ Witwatersrand, DST NRF Ctr Excellence Strong Mat, Private Bag 3, Johannesburg, South Africa
[4] Univ Witwatersrand, Inst Mol Sci, Private Bag 3, Johannesburg, South Africa
[5] Univ Witwatersrand, Mat Energy Res Grp, Private Bag 3, Johannesburg, South Africa
关键词
Organic photovoltaics; Solution heat treatment; Poly(3-hexylthiophene-2,5-diyl); Crystallinity; POLYMER SOLAR-CELLS; MORPHOLOGY EVOLUTION; SELF-ORGANIZATION; CHARGE-TRANSPORT; SOLVENT; POLY(3-HEXYLTHIOPHENE); PHOTOGENERATION; GENERATION; EFFICIENCY; NETWORK;
D O I
10.1016/j.tsf.2017.01.047
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The efficiency of bulk heterojunction organic photovoltaic cells can be-enhanced through heat treatment of the components of the blend solution. The morphology of films spun from the heat treated blend solution reveals a more favorable diffusion of [6,6]-phenyl-C61-butyric acid methyl ester into the Poly(3-hexylthiophene-2,5-diyl) matrix than observed in the separate heating of the individual solutions. Heat treatment of a Poly(3-hexylthiophene-2,5-diyl) solution showed an enhanced Raman intensity associated with structural ordering. Heating of the blend solution after pre-heating P3HT solution to form a bulk heterojunction (P3HT:PCBM) with a ratio of 1:1 leads to limited diffusion of the [6,6] -phenyl-C61-butyric acid methyl ester phase into the crystalline Poly(3-hexylthiophene-2,5-diyl) phase. This study showed that solution heat treatment of a P3HT:PCBM blend leads to structural ordering of the Poly(3-hexylthiophene-2,5-diyl) polymer which modified the optical, morphological, PL and Raman characteristics relative to highly ordered Poly(3-hexylthiophene-2,5-diyl). The high Poly(3-hexylthiophene-2,5-diyl) polymer crystallinity enhanced the red shifted optical absorption, narrowed the full width at half maximum of Raman peaks and decreased the photoluminescence intensity upon solution heat treatment. The efficiency of the Bulk heterojunction made from a solution heat treated blend has yielded maximum power conversion efficiency of 3.0% and a fill factor up to 43% under Air Mass 1.5, 100-mW/cm(2) illumination. Separate heat treatment of a Poly(3-hexylthiophene-2,5-diy1) solution before forming the blend did not improve the current-voltage properties of an organic photovoltaic device. Rather the simultaneous ordering of Poly(3-hexylthiophene-2,5-diyl) as well as the diffusion of [6,6] -phenyl-C61-butyric add methyl ester into the Poly(3-hexylthiophene-2,5-diyl) was the main contributor to the enhanced device performance. We compare the short time heating of the blend solution to a standard reference device made from long time stirring of a blend at low temperature. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:62 / 69
页数:8
相关论文
共 39 条
[1]   Carrier motion in as-spun and annealed P3HT:PCBM blends revealed by ultrafast optical electric field probing and Monte Carlo simulations [J].
Abramavicius, Vytautas ;
Vithanage, Dimali Amarasinghe ;
Devizis, Andrius ;
Infahsaeng, Yingyot ;
Bruno, Annalisa ;
Foster, Samuel ;
Keivanidis, Panagiotis E. ;
Abramavicius, Darius ;
Nelson, Jenny ;
Yartsev, Arkady ;
Sundstroem, Villy ;
Gulbinas, Vidmantas .
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2014, 16 (06) :2686-2692
[2]  
[Anonymous], INT J PHOTOGR
[3]  
[Anonymous], NAT MAT
[4]  
[Anonymous], 2010, ADV MAT, DOI DOI 10.1002/ADMA.200903122
[5]  
BAI X, 1993, MACROMOLECULES, V26, P4457
[6]   Morphology evolution via self-organization and lateral and vertical diffusion in polymer: fullerene solar cell blends [J].
Campoy-Quiles, Mariano ;
Ferenczi, Toby ;
Agostinelli, Tiziano ;
Etchegoin, Pablo G. ;
Kim, Youngkyoo ;
Anthopoulos, Thomas D. ;
Stavrinou, Paul N. ;
Bradley, Donal D. C. ;
Nelson, Jenny .
NATURE MATERIALS, 2008, 7 (02) :158-164
[7]   Morphology Evolution of Spin-Coated Films of Poly(thiophene-phenylene-thiophene) and [6,6]-Phenyl-C71-butyric Acid Methyl Ester by Solvent Effect [J].
Chan, Shu-Hua ;
Hsiao, Yu-Sheng ;
Hung, Ling-I ;
Hwang, Gue-Wuu ;
Chen, Hsin-Lung ;
Ting, Ching ;
Chen, Chih-Ping .
MACROMOLECULES, 2010, 43 (07) :3399-3405
[8]   Influence of nanomorphology on the photovoltaic action of polymer-fullerene composites [J].
Chirvase, D ;
Parisi, J ;
Hummelen, JC ;
Dyakonov, V .
NANOTECHNOLOGY, 2004, 15 (09) :1317-1323
[9]   Free Energy Control of Charge Photogeneration in Polythiophene/Fullerene Solar Cells: The Influence of Thermal Annealing on P3HT/PCBM Blends [J].
Clarke, Tracey M. ;
Ballantyne, Amy M. ;
Nelson, Jenny ;
Bradley, Donal D. C. ;
Durrant, James R. .
ADVANCED FUNCTIONAL MATERIALS, 2008, 18 (24) :4029-4035
[10]   The limits to organic photovoltaic cell efficiency [J].
Forrest, SR .
MRS BULLETIN, 2005, 30 (01) :28-32