Effect of 1,8-diiodooctane on the performance of poly(3-hexylthiophene) (P3HT):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) solar cells with glass/indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/P3HT: PCBM/Ca/Al structure was studied. The morphology and thickness of the active layer were investigated using atomic force microscopy (AFM). The UV-visible spectroscopy and X-ray diffraction (XRD) analysis were used to study the absorption behavior (of the solutions and coated layers) and crystallinity of the active layer, respectively. The results show that the existence of 1,8-diiodooctane reduced the open circuit voltage from 0.81 to 0.52 V and increased the short circuit current by about three folds; the fill factor (FF) and power conversion efficiency were increased from 36.0 to 54.1% and 0.47% to 1.54%, respectively. These changes can be attributed to the enhanced crystallinity of P3HT or the doping effect of 1,8-diiodooctane on P3HT chains. UV-visible analysis demonstrated that the addition of 1,8-diiodooctane to the solution did not change the absorption onset, whereas in the coated layers, the maximum absorption peak shifted to higher wavelengths. The XRD analyses demonstrated the enhancement of crystallinity of P3HT upon the introduction of 1,8-diiodooctane.
Issue Section:
Technical Brief
References
1.
Padinger
, F.
, Rittberger
, R. S.
, and Sariciftci
, N. S.
, 2003
, “Effects of Postproduction Treatment on Plastic Solar Cells
,” Adv. Funct. Mater.
, 13
(2
), pp. 85
–88
.10.1002/adfm.2003900112.
Shaheen
, S. E.
, Brabec
, C. J.
, Sariciftci
, N. S.
, Padinger
, F.
, Fromherz
, T.
, and Hummelen
, J. C.
, 2001
, “2.5% Efficient Organic Plastic Solar Cells
,” Appl. Phys. Lett.
, 78
(6
), pp. 841
–843
.10.1063/1.13458343.
Brabec
, C. J.
, Sariciftci
, N. S.
, and Hummelen
, J. C.
, 2001
, “Plastic Solar Cells
,” Adv. Funct. Mater.
, 11
(1
), pp. 15
–26
.10.1002/1616-3028(200102)11:1<15::AID-ADFM15>3.0.CO;2-A4.
Brabec
, C. J.
, 2004
, “Organic Photovoltaics: Technology and Market
,” Sol. Energy Mater. Sol. Cells
, 83
(2–3
), pp. 273
–292
.10.1016/j.solmat.2004.02.0305.
Yu
, G.
, Gao
, J.
, Hummelen
, J. C.
, Wudl
, F.
, and Heeger
, A. J.
, 1995
, “Polymer Photovoltaic Cells: Enhanced Efficiencies Via a Network of Internal Donor-Acceptor Heterojunctions
,” Science
, 270
(5243
), pp. 1789
–1791
.10.1126/science.270.5243.17896.
Green
, M. A.
, Emery
, K.
, Hishikawa
, Y.
, and Warta
, W.
, 2011
, “Solar Cell Efficiency Tables Version 37
,” Prog. Photovoltaics: Res. Appl.
, 19
(1
), pp. 84
–92
.10.1002/pip.10887.
Brabec
, C. J.
, Gowrisanker
, S.
, Halls
, J. J. M.
, Laird
, D.
, Jia
, S.
, and Williams
, S. P.
, 2010
, “Polymer–Fullerene Bulk-Heterojunction Solar Cells
,” Adv. Mater.
, 22
(34
), pp. 3839
–3856
.10.1002/adma.2009036978.
Li
, G.
, Shrotriya
, V.
, Huang
, J.
, Yao
, Y.
, Moriarty
, T.
, Emery
, K.
, and Yang
, Y.
, 2005
, “High-Efficiency Solution Processable Polymer Photovoltaic Cells by Self-Organization of Polymer Blends
,” Nature Mater.
, 4
(11), pp. 864
–868
.10.1038/nmat15009.
Lee
, J. K.
, Ma
, W. L.
, Brabec
, C. J.
, Yuen
, J.
, Moon
, J. S.
, Kim
, J. Y.
, Lee
, K.
, Bazan
, G. C.
, and Heeger
, A. J.
, 2008
, “Processing Additives for Improved Efficiency from Bulk Heterojunction Solar Cells
,” J. Am. Chem. Soc.
, 130
(11
), pp. 3619
–3623
.10.1021/ja710079w10.
Moul
, A. J.
, and Meerholz
, K.
, 2008
, “Controlling Morphology in Polymer-Fullerene Mixtures
,” Adv. Mater.
, 20
(2
), pp. 240
–245
.10.1002/adma.20070151911.
Hoppe
, H.
, and Sariciftci
, N. S.
, 2006
, “Morphology of Polymer/Fullerene Bulk Heterojunction Solar Cells
,” J. Mater. Chem.
, 16
(1), pp. 45
–61
.10.1039/b510618b12.
Chen
, C.-C.
, Chang
, W.-H.
, Yoshimura
, K.
, Ohya
, K.
, You
, J.
, Gao
, J.
, Hong
, Z.
, and Yang
, Y.
, 2014
, “An Efficient Triple-Junction Polymer Solar Cell Having a Power Conversion Efficiency Exceeding 11%
,” Adv. Mater.
, 26
(32
), pp. 5670
–5677
.10.1002/adma.20140207213.
You
, J.
, Dou
, L.
, Yoshimura
, K.
, Kato
, T.
, Ohya
, K.
, Moriarty
, T.
, Emery
, K.
, Chen
, C.-C.
, Gao
, J.
, Li
, G.
, and Yang
, Y.
, 2013
, “A Polymer Tandem Solar Cell With 10.6% Power Conversion Efficiency
,” Nature Commun.
, 4
, Article number: 1446.10.1038/ncomms241114.
Satapathi
, S.
, Gill
, H. S.
, Li
, L.
, Samuelson
, L.
, Kumar
, J.
, and Mosurkal
, R.
, 2014
, “Synthesis of Nanoparticles of P3HT and PCBM for Optimizing Morphology in Polymeric Solar Cells
,” Appl. Surf. Sci.
, 323
, pp. 13
–18
.10.1016/j.apsusc.2014.07.17515.
Li
, L.
, Jacobs
, D. L.
, Che
, Y.
, Huang
, H.
, Bunes
, B. R.
, Yang
, X.
, and Zang
, L.
, 2013
, “Poly(3-Hexylthiophene) Nanofiber Networks for Enhancing the Morphology Stability of Polymer Solar Cells
,” Org. Electron.
, 14
(5), pp. 1383
–1390
.10.1016/j.orgel.2013.02.03216.
Lin
, S.-H.
, Lan
, S.
, Sun
, J.-Y.
, and Lin
, C.-F.
, 2013
, “Influence of Mixed Solvent on the Morphology of the P3ht:Indene-C60 Bisadduct (Icba) Blend Film and the Performance of Inverted Polymer Solar Cells
,” Org. Electron.
, 14
(1
), pp. 26
–31
.10.1016/j.orgel.2012.10.01517.
Zheng
, Y.
, Li
, S.
, Zheng
, D.
, and Yu
, J.
, 2014
, “Effects of Different Polar Solvents for Solvent Vapor Annealing Treatment on the Performance of Polymer Solar Cells
,” Org. Electron.
, 15
(11
), pp. 2647
–2653
.10.1016/j.orgel.2014.07.02618.
Gholamkhass
, B.
, and Servati
, P.
, 2013
, “Solvent–Vapor Induced Morphology Reconstruction for Efficient Pcdtbt Based Polymer Solar Cells
,” Org. Electron.
, 14
(9
), pp. 2278
–2283
.10.1016/j.orgel.2013.05.01419.
Das
, S.
, Choi
, J.-Y.
, and Alford
, T. L.
, 2015
, “P3HT:PC61BM Based Solar Cells Employing Solution Processed Copper Iodide as the Hole Transport Layer
,” Solar Energy Mater. Solar Cells
, 133
, pp. 255
–259
.10.1016/j.solmat.2014.11.00420.
Hu
, Z.
, Zhang
, J.
, Huang
, L.
, Sun
, J.
, Zhang
, T.
, He
, H.
, Zhang
, J.
, Zhang
, H.
, and Zhu
, Y.
, 2015
, “Natural Drying Effect on Active Layer for Achieving High Performance in Polymer Solar Cells
,” Renewable Energy
, 74
, pp. 11
–17
.10.1016/j.renene.2014.07.03421.
Coates
, N. E.
, Hwang
, I. W.
, Peet
, J.
, Bazan
, G. C.
, Moses
, D.
, and Heeger
, A. J.
, 2008
, “1,8-Octanedithiol as a Processing Additive for Bulk Heterojunction Materials: Enhanced Photoconductive Response
,” Appl. Phys. Lett.
, 93
(7
), p. 072105
.10.1063/1.296940522.
Yao
, Y.
, Hou
, J.
, Xu
, Z.
, Li
, G.
, and Yang
, Y.
, 2008
, “Effects of Solvent Mixtures on the Nanoscale Phase Separation in Polymer Solar Cells
,” Adv. Funct. Mater.
, 18
(12
), pp. 1783
–1789
.10.1002/adfm.20070145923.
Chen
, H.-Y.
, Yang
, H.
, Yang
, G.
, Sista
, S.
, Zadoyan
, R.
, Li
, G.
, and Yang
, Y.
, 2009
, “Fast-Grown Interpenetrating Network in Poly(3-Hexylthiophene): Methanofullerenes Solar Cells Processed With Additive
,” J. Phys. Chem. C
, 113
(18
), pp. 7946
–7953
.10.1021/jp810798z24.
Erb
, T.
, Zhokhavets
, U.
, Gobsch
, G.
, Raleva
, S.
, Stuhn
, B.
, Schilinsky
, P.
, Waldauf
, C.
, and Brabec
, C. J.
, 2005
, “Correlation Between Structural and Optical Properties of Composite Polymer/Fullerene Films for Organic Solar Cells
,” Adv. Funct. Mater.
, 15
(7
), pp. 1193
–1196
.10.1002/adfm.20040052125.
Aasmundtveit
, K. E.
, Samuelsen
, E. J.
, Guldstein
, M.
, Steinsland
, C.
, Flornes
, O.
, Fagermo
, C.
, Seeberg
, T. M.
, Pettersson
, L. A. A.
, Inganas
, O.
, Feidenhans
, R.
, and Ferrer
, S.
, 2000
, “Structural Anisotropy of Poly(Alkylthiophene) Films
,” Macromolecules
, 33
(8
), pp. 3120
–3127
.10.1021/ma991631k26.
Prosa
, T. J.
, Winokur
, M. J.
, Moulton
, J.
, Smith
, P.
, and Heeger
, A. J.
, 1992
, “X-Ray Structural Studies of Poly(3-Alkylthiophenes): An Example of an Inverse Comb
,” Macromolecules
, 25
(17
), pp. 4364
–4372
.10.1021/ma00043a01927.
Erba
, T.
, Raleva
, S.
, Zhokhavets
, U.
, Gobsch
, G.
, Stühn
, B.
, Spode
, M.
, and Ambacher
, O.
, 2004
, “Structural and Optical Properties of Both Pure Poly(3-Octylthiophene) (P3OT) and P3OT/Fullerene Films
,” Thin Solid Films
, 450
(1
), pp. 97
–100
.10.1016/j.tsf.2003.10.045Copyright © 2015 by ASME
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