Transient absorption spectroscopy studies on polythiophene-fullerene bulk heterojunction organic blend films sensitized with a low-bandgap polymer

Macromolecular Rapid Communications

Volumn 34, Issue 13, 2013, Pages 1090-1097

  Löslein, Heiko ^a,b   Ameri, Tayebeh ^a   Matt, Gebhard J ^a   Koppe, Markus ^c   Egelhaaf, Hans J ^d,e   Troeger, Anna ^a   Sgobba, Vito ^a   Guldi, Dirk M ^a   Brabec, Christoph J ^a,f  

^a UNIVERSITY OF ERLANGEN NUREMBERG   (Germany)

^b UNIVERSITY OF ST ANDREWS   (United Kingdom)

^c JOHANNES KEPLER UNIVERSITY LINZ   (Austria)

^d Konarka Austria Forschungs und Entwicklungs GmbH   (Austria)

^e BELECTRIC OPV GmbH   (Germany)

^f BAVARIAN CENTER FOR APPLIED ENERGY RESEARCH ZAE BAYERN   (Germany)

Author keywords

conjugated polymers; organic electronics; photochemistry; solar cells; thin films

Indexed keywords

BULK HETEROJUNCTION; LIGHT-HARVESTING; LOW-BANDGAP POLYMERS; OPERATION MECHANISM; ORGANIC ELECTRONICS; ORGANIC SOLAR CELL; POLYMER-BASED SOLAR CELLS; TRANSIENT ABSORPTION SPECTROSCOPIES;

CONJUGATED POLYMERS; ENERGY GAP; FULLERENES; HETEROJUNCTIONS; PHOTOCHEMICAL REACTIONS; POLARONS; SOLAR CELLS; THIN FILMS;

POLYMER FILMS;

FULLERENE DERIVATIVE; POLYMER; POLYTHIOPHENE; THIOPHENE DERIVATIVE;

ARTICLE; CHEMISTRY; CONJUGATED POLYMERS; ELECTROCHEMICAL ANALYSIS; ORGANIC ELECTRONICS; PHOTOCHEMISTRY; POLYMERIZATION; SOLAR CELLS; SOLAR ENERGY; SPECTROSCOPY; THIN FILMS;

CONJUGATED POLYMERS; ORGANIC ELECTRONICS; PHOTOCHEMISTRY; SOLAR CELLS; THIN FILMS;

ELECTROCHEMICAL TECHNIQUES; FULLERENES; POLYMERIZATION; POLYMERS; SOLAR ENERGY; SPECTRUM ANALYSIS; THIOPHENES;

EID: 84879840677     PISSN: 10221336     EISSN: 15213927     Source Type: Journal    
DOI: 10.1002/marc.201300354     Document Type: Article

References (23)

1. M. A. Green, K. Emery, Y. Hishikawa, W. Warta, E. D. Dunlop, Prog. Photovolt. Res. Appl. 2012, 20, 12.
2. C. Soci, I. W. Hwang, D. Moses, Z. Zhu, D. Waller, R. Gaudiana, C. J. Brabec, A. J. Heeger, Adv. Funct. Mater. 2007, 17, 632.
3. R. Kroon, M. Lenes, J. C. Hummelen, P. W. M. Blom, B. D. Boer, Polym. Rev. 2008, 48, 531.
4. H. Q. Wang, M. Batentschuk, A. Osvet, L. Pinna, C. J. Brabec, Adv. Mater. 2011, 23, 2675.
5. N. Li, F. Machui, D. Waller, M. Koppe, C. J. Brabec, Sol. Energy Mater. Sol. Cells. 2011, 95, 3465.
6. M. Koppe, H. J. Egelhaaf, G. Dennler, M. C. Scharber, C. J. Brabec, P. Schilinsky, C. N. Hoth, Adv. Funct. Mater. 2010, 20, 338.
7. Y. Kim, S. Cook, S. M. Tuladhar, S. A. Choulis, J. Nelson, J. R. Durrant, D. D. C. Bradley, M. Giles, I. McCulloch, C. S. Ha, M. Ree, Nat. Mater. 2006, 5, 197.
8. T. M. Clarke, F. C. Jamieson, J. R. Durrant, J. Phys. Chem. C. 2009, 113, 20934.
9. M. P. Eng, P. R. F. Barnes, J. R. Durrant, J. Phys. Chem. Lett. 2010, 1, 3096.
10. B. Kraabel, C. H. Lee, D. McBranch, D. Moses, N. S. Sariciftci, A. J. Heeger, Chem. Phys. Lett. 1993, 213, 389.
11. C. J. Brabec, G. Zerza, G. Cerullo, S. D. Silvestri, S. Luzzati, J. C. Hummelen, N. S. Sariciftci, Chem. Phys. Lett. 2001, 340, 232.
12. S. Cook, R. Katoh, A. Furube, J. Phys. Chem. C. 2009, 113, 2547.
13. I. A. Howard, R. Mauer, M. Meister, F. Laquai, J. Am. Chem. Soc. 2010, 132, 14866.
14. C. Soci, I. W. Hwang, C. Yang, D. Moses, Z. Zhu, D. Waller, R. Gaudiana, C. J. Brabec, A. J. Heeger, Proc. SPIE 2006, 6334, 63340D-1.
15. I. W. Hwang, C. Soci, D. Moses, Z. Zhu, D. Waller, R. Gaudiana, C. J. Brabec, A. J. Heeger, Adv. Mater. 2007, 19, 2307.
16. S. Honda, T. Nogami, H. Ohkita, H. Benten, S. Ito, Appl. Mater. Interfaces 2009, 1, 804.
17. Absorption spectra and differential absorption spectra upon photoexcitation were recorded after depositing the films on quartz. Differential absorption spectra upon spectroelectrochemical oxidation were recorded after depositing the films on ITO. CE: Pt wire. Quasi reference electrode: Ag wire. Supporting electrolyte: tetrabutylammonium hexafluorophosphate 0.1 M in acetonitrile.
18. Please note that the signal ranging from 720 to 800 nm is affected by an artifact due to overlap between pump and probe wavelengths and was consequently omitted from the plots.
19. R. Österbacka, C. P. An, X. M. Jiang, Z. V. Vardeny, Science 2000, 287, 839.
20. O. J. Korovyanko, R. Österbacka, X. M. Jiang, Z. V. Vardeny, Phys. Rev. B 2001, 64, 235122.
21. -2), the P3HT:PCBM 1:1 reference sample showed the same pronounced features as upon excitation with a wavelength of 550 nm with the same intensity. The reason for such a behavior is not unambiguously identified at this stage. A likely rationale implies direct generation of CT states even though the sample was excited with energy smaller than the bandgap of P3HT. Residual contributions from the seed laser can cause erroneous excitation of P3HT. In the experiments presented in this communication, direct charge generation in P3HT in the P3HT:PCPDTBT:PCBM 0.9:0.1:1 films are excluded because P3HT:PCBM 1:1 films showed no significant features under the same experimental conditions.
22. n are the amplitudes of the transients. Nevertheless, only absorption time profiles at 565 and 650 nm were shown in Figure 2 since they directly relate to the investigated hole transfer process.
23. M. Morana, H. Azimi, G. Dennler, H. J. Egelhaaf, M. Scharber, K. Forberich, J. Hauch, R. Gaudiana, D. Waller, Z. Zhu, K. Hingerl, S. S. v. Bavel, J. Loos, C. J. Brabec, Adv. Funct. Mater. 2010, 20, 1180.