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Influence of morphological disorder on in- and out-of-plane charge transport in conjugated polymer films

  • Anton Li (a1), Ban Xuan Dong (a1) and Peter F. Green (a1)
Abstract
Abstract

Thin films of the conjugated polymer poly(3-hexylthiophene) (P3HT) of different morphological structures were fabricated using both conventional spin-casting and the matrix-assisted pulsed laser evaporation (MAPLE). Films deposited by MAPLE exhibit inhomogeneous morphologies comprised globular subfeatures with dimensions of the order of 100 nm. We show that whereas the in-plane carrier mobilities of MAPLE-deposited films (8.3 × 10−3 cm2/V/s) are comparable with those of spin-cast analogs (5.5 × 10−3 cm2/V/s), the out-of-plane mobilities are an order of magnitude lower (4.1 × 10−4 cm2/V/s versus 2.7 × 10−3 cm2/V/s). Both in- and out-of-plane carrier transport characteristics of MAPLE-deposited films indicate a broad density of states and high carrier trap concentration. Optical absorbance spectroscopy not only corroborates a high degree of energetic disorder in MAPLE-deposited films, but also suggests that the P3HT chains possess average conjugation lengths comparable with spin-cast counterparts. Our findings, rationalized in terms of the Gaussian Disorder Model, describing carrier transport in an environment characterized by both positional and energetic disorder, provide important perspectives on the extent to which disorder impacts mechanisms of charge transport in conjugated polymers.

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* Address all correspondence to Peter F. Green at pfgreen@umich.edu
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2. A.P. Caricato and A. Luches : Applications of the matrix-assisted pulsed laser evaporation method for the deposition of organic, biological and nanoparticle thin films: a review. Appl. Phys. A 105, 565582 (2011).

3. R.A. McGill , D.B. Chrisey , A. Pique , and T.E. Mlsna : Matrix-assisted pulsed-laser evaporation (MAPLE) of functionalized polymers: applications with chemical sensors. SPIE Proc. 3274, 255266 (1998).

5. D.B. Chrisey , A. Piqué , R.A. McGill , J.S. Horwitz , B.R. Ringeisen , D.M. Bubb , and P.K. Wu : Laser deposition of polymer and biomaterial films. Chem. Rev. 103, 553576 (2003).

6. Y. Guo , A. Morozov , D. Schneider , J.W. Chung , C. Zhang , M. Waldmann , N. Yao , G. Fytas , C.B. Arnold , and R.D. Priestley : Ultrastable nanostructured polymer glasses. Nat. Mater. 11, 337343 (2012).

8. A. Gutiérrez-Llorente , G. Horowitz , R. Pérez-Casero , J. Perrière , J.L. Fave , A. Yassar , and C. Sant : Growth of polyalkylthiophene films by matrix assisted pulsed laser evaporation. Org. Electron. 5, 2934 (2004).

11. W. Ge , A. Atewologun , and A.D. Stiff-Roberts : Hybrid nanocomposite thin films deposited by emulsion-based resonant infrared matrix-assisted pulsed laser evaporation for photovoltaic applications. Org. Electron. 22, 98107 (2015).

12. J.A. Greer : Design challenges for matrix assisted pulsed laser evaporation and infrared resonant laser evaporation equipment. Appl. Phys. A 105, 661671 (2011).

13. W. Ge , R.D. McCormick , G. Nyikayaramba , and A.D. Stiff-Roberts : Bulk heterojunction PCPDTBT: PC71BM organic solar cells deposited by emulsion-based, resonant infrared matrix-assisted pulsed laser evaporation. Appl. Phys. Lett. 104, 223901 (2014).

14. E. Leveugle and L.V. Zhigilei : Molecular dynamics simulation study of the ejection and transport of polymer molecules in matrix-assisted pulsed laser evaporation. J. Appl. Phys. 102, 074914 (2007).

15. K.B. Shepard , C.B. Arnold , and R.D. Priestley : Transport and stability of laser-deposited amorphous polymer Nanoglobules. ACS Macro Lett. 3, 10461050 (2014).

18. F.C. Spano : Absorption in regio-regular poly(3-hexyl)thiophene thin films: Fermi resonances, interband coupling and disorder. Chem. Phys. 325, 2235 (2006).

19. J. Clark , J.-F. Chang , F.C. Spano , R.H. Friend , and C. Silva : Determining exciton bandwidth and film microstructure in polythiophene films using linear absorption spectroscopy. Appl. Phys. Lett. 94, 163306 (2009).

20. J. Gierschner , Y.-S. Huang , B.V. Averbeke , J. Cornil , R.H. Friend , and D. Beljonne : Excitonic versus electronic couplings in molecular assemblies: the importance of non-nearest neighbor interactions. J. Chem. Phys. 130, 044105 (2009).

21. F.C. Spano and C. Silva : H- and J-aggregate behavior in polymeric semiconductors. Annu. Rev. Phys. Chem. 65, 477500 (2014).

22. F. Dinelli , M. Murgia , P. Levy , M. Cavallini , F. Biscarini , and D.M. de Leeuw : Spatially correlated charge transport in organic thin film transistors. Phys. Rev. Lett. 92, 116802 (2004).

23. A. Salleo , R.J. Kline , D.M. DeLongchamp , and M.L. Chabinyc : Microstructural characterization and charge transport in thin films of conjugated polymers. Adv. Mater. 22, 38123838 (2010).

24. R. Joseph Kline , M.D. McGehee , and M.F. Toney : Highly oriented crystals at the buried interface in polythiophene thin-film transistors. Nat. Mater. 5, 222228 (2006).

25. H. Sirringhaus : 25th anniversary article: organic field-effect transistors: the path beyond amorphous silicon. Adv. Mater. 26, 13191335 (2014).

29. P.W.M. Blom , M.J.M. de Jong , and J.J.M. Vleggaar : Electron and hole transport in poly(p-phenylene vinylene) devices. Appl. Phys. Lett. 68, 33083310 (1996).

30. T. Kirchartz : Influence of diffusion on space-charge-limited current measurements in organic semiconductors. Beilstein J. Nanotechnol. 4, 180188 (2013).

32. H. Bässler : Charge transport in disordered organic photoconductors a Monte Carlo simulation study. Phys. Status Solidi B 175, 1556 (1993).

33. A.J. Mozer and N.S. Sariciftci : Negative electric field dependence of charge carrier drift mobility in conjugated, semiconducting polymers. Chem. Phys. Lett. 389, 438442 (2004).

34. B.X. Dong , B. Huang , A. Tan , and P.F. Green : Nanoscale orientation effects on carrier transport in a low-band-gap polymer. J. Phys. Chem. C 118, 1749017498 (2014).

35. R. Noriega , J. Rivnay , K. Vandewal , F.P.V. Koch , N. Stingelin , P. Smith , M.F. Toney , and A. Salleo : A general relationship between disorder, aggregation and charge transport in conjugated polymers. Nat. Mater. 12, 10381044 (2013).

36. S.A. Mollinger , B.A. Krajina , R. Noriega , A. Salleo , and A.J. Spakowitz : Percolation, tie-molecules, and the microstructural determinants of charge transport in Semicrystalline conjugated polymers. ACS Macro Lett. 4, 708712 (2015). doi:10.1021/acsmacrolett.5b00314.

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