Time-resolved electrostatic force microscopy of polymer solar cells

Nature Materials

Volumn 5, Issue 9, 2006, Pages 735-740

  Coffey, David C ^a   Ginger, David S ^a  

^a UNIVERSITY OF WASHINGTON   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CARRIER MOBILITY; ELECTRIC CHARGE; MORPHOLOGY; OPTIMIZATION; PHOTOCHEMICAL REACTIONS; PHOTODIODES; POLYMER BLENDS; QUANTUM EFFICIENCY;

CARRIER TRANSPORT; ELECTROSTATIC FORCE MICROSCOPY; FILM MORPHOLOGY; RECOMBINATION RATES;

SOLAR CELLS;

EID: 33748262607     PISSN: 14761122     EISSN: 14764660     Source Type: Journal    
DOI: 10.1038/nmat1712     Document Type: Article

References (43)

1. Nelson, J. Solar energy-Solar cells by self-assembly? Science 293, 1059-1060 (2001).
2. Shaheen, S. E., Ginley, D. S. & Jabbour, G. E. Organic-based photovoltaics. toward lowm-cost power generation. Mater. Res. Soc. Bull. 30, 10-19 (2005).
3. Hoppe, H. & Sariciftci, N. S. Organic solar cells: An overview. Mater. Res. Soc. Bull. 19, 1924-1945 (2004).
4. Gregg, B. A. The photoconversion mechanism of excitonic solar cells. Mater. Res. Soc. Bull. 30, 20-22 (2005).
5. Halls, J. J. M. et al. Efficient photodiodes from interpenetrating polymer networks. Nature 376, 498-500 (1995).
6. Yu, G., Gao, J., Hummelen, J. C., Wudl, F. & Heeger, A. J. Polymer photovoltaic cells - enhanced efficiencies via a network of internal donor-acceptor heterojunetions. Science 270, 1789-1791 (1995).
7. Chirvase, D., Parisi, J., Hummelen, J. C. & Dyakonov, V. Influence of nanomorphology on the photovoltaic action of polymer-fullerene composites. Nanotechnology 15, 1317-1323 (2004).
8. Padinger, F., Rittberger, R. S. & Sariciftci, N. S. Effects of postproduction treatment on plastic solar cells. Adv. Funct. Mater. 13, 85-88 (2003).
9. van Duren, J. K.J. et al. Relating the morphology of poly(p-phenylene vinylene)/methanofullerene blends to solar-cell performance. Adv. Funct. Mater. 14, 425-434 (2004).
10. Kim, Y. et al A strong regioregularity effect in self-organizing conjugated polymer films and high-efficiency polythiophene: fullerene solar cells. Nature Mater. 5, 197-203 (2006).
11. Snaith, H. J., Arias, A. C., Morteani, A. C., Silva, C. & Friend, R. H. Charge generation kinetics and transport mechanisms in blended polyfluorene photovoltaic devices. Nano Lett. 2, 1353-1357 (2002).
12. Arias, A. C. et al Photovoltaic performance and morphology of polyfluorene blends: A combined microscopic and photovoltaic investigation. Macromolecules 34, 6005-6013 (2001).
13. Moons, E. Conjugated polymer blends: linking film morphology to performance of light emitting diodes and photodiodes. J. Phys. Condens. Matter 14, 12235-12260 (2002).
14. Coakley, K. M., Liu, Y. X., Goh, C. & McGehee, M. D. Ordered organic-inorganic bulk heterojunction photovoltaic cells. Mater. Res. Bull. 30, 37-40 (2005).
15. Coffey, D. C. & Ginger, D. S. Patterning phase separation in polymer films with dip-pen nanolithography. J. Am. Chem. Soc. 127, 4564-4565 (2005).
16. McNeill, C. R., Frohne, H., Holdsworth, J. L. & Dastoor, P. C. Near-field scanning photocurrent measurements of polyfluorene blend devices: Directly correlating morphology with current generation. Nano Lett. 4, 2503-2507 (2004).
17. Chappell, J. et al Correlating structure with fluorescence emission in phase-separated conjugated-polymer blends. Nature Mater. 2, 616-621 (2003).
18. McNeill, J. D. & Barbara, P. F. NSOM investigation of carrier generation, recombination, and drift in a conjugated polymer. J. Phys. Chem. B 106, 4632-4639 (2002).
19. Stevenson, R. et al Fluorescence scanning near-field optical microscopy of polyfluorene composites. J. Microsc.-Oxford 202, 433-438 (2001).
20. Cadby, A., Dean, R., Fox, A. M., Jones, R. A. L. & Lidzey, D. G. Mappingthe fluorescence decay lifetime of a conjugated polymer in a phase-separated blend using a scanningnear-fleld optical microscope. Nano Lett. 5, 2232-2237 (2005).
21. DeAro, J. A., Moses, D. & Buratto, S. K. Near-field photoconductivity of stretch-oriented poly(para-phenylene vinylene). Appl. Phys. Lett. 75, 3814-3816 (1999).
22. Riehn, R. et al. Local probing of photocurrent and photoluminescence in a phase-separated conjugated-polymer blend by means of near-field excitation. Adv. Funct. Mater. 16, 469-476 (2006).
23. McNeill, C. R. & Dastoor, P. C. Photocurrent pattern formation in polymer/methanofullerene blends imaged by near-field scanning photocurrent microscopy. J. Appl Phys. 99, 033502 (2006).
24. Chiesa, M. et al. Correlation between surface photovoltage and blend morphology in polyfluorene-based photodiodes. Nano Lett. 5, 559-563 (2005).
25. Hoppe, H. et al. Kelvin probe force microscopy study on conjugated polymer/fullerene bulk heterojunction organic solar cells. Nano Lett. 5, 269-274 (2005).
26. Russell, D. M. et al. Efficient light harvesting in a photovoltaic diode composed of a semiconductor conjugated copolymer blend. Appl. Phys. Lett. 80, 2204-2206 (2002).
27. Koster, L J. A., Smits, E. C. P., Mihailetchi, V. D. & Blom, P. W. M. Device model for the operation of polymer/fullerene bulk heterojunction solar cells. Phys. Rev. B 72, 085205 (2005).
28. Burgi, L., Richards, T. J., Friend, R. H. & Sirringhaus, H. Close look at charge carrier injection in polymer field-effect transistors. J. Appl. Phys. 94, 6129-6137 (2003).
29. Silveira, W. R. & Marohn, J. A. Microscopic view of charge injection in an organic semiconductor. Phys. Rev. Lett. 93, 116104 (2004).
30. Burgi, L., Richards, T., Chiesa, M., Friend, R. H. & Sirringhaus, H. A microscopic view of charge transport in polymer transistors. Synth. Met. 146, 297-309 (2004).
31. Palermo, V., Palma, M. & Samori, P. Electronic characterization of organic thin films by Kelvin probe force microscopy. Adv. Mater. 18, 145-164 (2006).
32. Muller, E. M. & Marohn, J. A. Microscopic evidence for spatially inhomogeneous charge trapping in pentacene. Adv. Mater. 17, 1410-1414 (2005).
33. Ramsdale, C. M. et al The origin of the open-circuit voltage in polyfluorene-based photovoltaic devices. J. Appl. Phys. 92, 4266-4270 (2002).
34. Ramsdale, C. M. et al ESEM imaging of polyfluorene blend cross-sections for organic devices. Physica E 14, 268-271 (2002).
35. Snaith, H. J., Greenham, N. C. & Friend, R. H. The origin of collected charge and open-circuit voltage in blended polyfluorene photovoltaic devices. Adv. Mater. 16, 1640-1645 (2004).
36. Arias, A C. et al. Vertically segregated polymer-blend photovoltaic thin-film structures through surface-mediated solution processing. Appl. Phys. Lett. 80, 1695-1697 (2002).
37. Tevaarwerk, E., Keppel, D. G., Rugheimer, P., Lagally, M. G. & Eriksson, M. A. Quantitative analysis of electric force microscopy: The role of sample geometry. Rev. Sci. Instrum. 76, 053707 (2005).
38. Koster, L. J. A., Mihailetchi, V. D., Ramaker, R. & Blom, P. W. M. Light intensity dependence of open-circuit voltage of polymer: fullerene solar cells. Appl. Phys. Lett. 86, 123505 (2005).
39. Morteani, A. C., Friend, R. H. & Silva, C. Exciton trapping at heterojunction s in polymer blends. J. Chem. Phys. 122, 244906 (2005).
40. Barker, J. A., Ramsdale, C. M. & Greenham, N. C. Modeling the current-voltage characteristics of bilayer polymer photovoltaic devices. Phys. Rev. B 67, 075205 (2003).
41. Tanase, C., Meijer, E. J., Blom, P. W. M. & de Leeuw, D. M. Unification of the hole transport in polymeric field-effect transistors and light-emitting diodes. Phys. Rev. Lett. 91, 216601 (2003).
42. Bucknall, D. G. Influence of interfaces on thin polymer film behaviour. Prog. Mater. Sci., 49, 713-786 (2004).
43. McNeill, C. R. et al. Nanoscale quantitative chemical mapping of conjugated polymer blends. Nano Lett. 6, 1202-1206 (2006).