Charge separation at molecular donor-acceptor interfaces: Correlation between morphology and solar cell performance

IEEE Journal on Selected Topics in Quantum Electronics

Volumn 16, Issue 6, 2010, Pages 1707-1717

  Opitz, Andreas ^a   Wagner, Julia ^a   Brütting, Wolfgang ^a   Salzmann, Ingo ^b   Koch, Norbert ^b   Manara, Jochen ^c   Pflaum, Jens ^c,d   Hinderhofer, Alexander ^e   Schreiber, Frank ^e  

^a UNIVERSITY OF AUGSBURG   (Germany)

^b HUMBOLDT UNIVERSITY   (Germany)

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

^d UNIVERSITY OF WÜRZBURG   (Germany)

^e UNIVERSITY OF TÜBINGEN   (Germany)

Author keywords

Fullerene; interface morphology; organic heterojunctions; organic photovoltaic cells; perylene derivative

Indexed keywords

AMBIPOLAR; CELL ARCHITECTURES; CHARGE SEPARATIONS; CHARGE-CARRIER TRANSPORT; DONOR AND ACCEPTOR; EXCITONIC SOLAR CELLS; INTERFACE MORPHOLOGIES; MOLECULAR DONORS; ORGANIC HETEROJUNCTIONS; ORGANIC PHOTOVOLTAIC CELLS; PERYLENE DERIVATIVES; PREPARATION CONDITIONS; SOLAR CELL PERFORMANCE;

CONDUCTIVE MATERIALS; FULLERENES; MORPHOLOGY; PHOTOELECTROCHEMICAL CELLS; PHOTOVOLTAIC CELLS; PHOTOVOLTAIC EFFECTS; SOLAR CELLS;

HETEROJUNCTIONS;

EID: 78650059914     PISSN: 1077260X     EISSN: None     Source Type: Journal    
DOI: 10.1109/JSTQE.2010.2048096     Document Type: Article

References (77)

1. C. J. Brabec, V. Dyakonov, J. Parisi, and N. S. Sariciftci, Organic Photovoltaics. Berlin, Germany: Springer-Verlag, 2003.
2. B. A. Gregg and M. C. Hanna, "Comparing organic to inorganic photovoltaic cells: Theory, experiment, and simulation, " J. Appl. Phys., vol. 93, pp. 3605-3614, 2003.
3. B. A. Gregg, "The photoconversion mechanism of excitonic solar cells, " MRS Bull., vol. 30, pp. 20-22, 2005.
4. P. I. Djurovich, E. I. Mayo, S. R. Forrest, and M. E. Thompson, "Measurement of the lowest unoccupied molecular orbital energies of molecular organic semiconductors, " Org. Electron., vol. 10, pp. 515-520, 2009.
5. C. W. Tang, "Two-layer organic photovoltaic cell, " Appl. Phys. Lett., vol. 48, pp. 183-185, 1986.
6. S. Forrest, "The limits to organic photovoltaic cell efficiency, " MRS Bull., vol. 30, pp. 28-32, 2005.
7. P. Peumans, A. Yakimov, and S. R. Forrest, "Small molecular weight organic thin-film photodetectors and solar cells, " J. Appl. Phys., vol. 93, pp. 3693-3723, 2003.
8. P. A. van Hal, R. A. J. Janssen, G. Lanzani, G. Cerullo, M. Zavelani-Rossi, and S. D. Silvestri, "Full temporal resolution of the two-step photoinduced energy-electron transfer in a fullerene-oligothiophene- fullerene triad using sub-10 fs pump-probe spectroscopy, " Chem. Phys. Lett., vol. 345, pp. 33-38, 2001.
9. P. Peumans, S. Uchida, and S. Forrest, "Efficient bulk heterojunction photovoltaic cells using small-molecular-weight organic thin films, " Nature, vol. 425, pp. 158-162, 2003.
10. S.-B. Rim and P. Peumans, "The effects of optical interference on exciton diffusion length measurements using photocurrent spectroscopy, " J. Appl. Phys., vol. 103, pp. 124515-1-124515-5, 2008.
11. R. R. Lunt, N. C. Giebink, A. A. Belak, J. B. Benziger, and S. R. Forrest, "Exciton diffusion lengths of organic semiconductor thin films measured by spectrally resolved photoluminescence quenching, " J. Appl. Phys., vol. 105, pp. 053711-1-053711-7, 2009.
12. J. J. M. Halls, C. A. Walsh, N. C. Greenham, E. A. Marseglia, R. H. Friend, S. C. Moratti, and A. B. Holmes, "Efficient photodiodes from interpenetrating polymer networks, " Nature, vol. 376, pp. 498-500, 1995.
13. G. Yu, J. Gao, J. C. Hummelen, F. Wudl, and A. J. Heeger, "Polymer photovoltaic cells: Enhanced efficiencies via a network of internal donor-acceptor heterojunctions, " Science, vol. 270, pp. 1789-1791, 1995.
14. C. Brabec, N. Sariciftci, and J. Hummelen, "Plastic solar cells, " Adv. Funct. Mater., vol. 11, pp. 15-26, 2001.
15. M. A. Green, K. Emery, Y. Hishikawa, and W. Warta, "Solar cell efficiency tables (version 33), " Prog. Photovoltaics, vol. 17, pp. 85-94, 2009.
16. B. Kippelen and J.-L. Bredas, "Organic photovoltaics, " Energy Environ. Sci., vol. 2, pp. 251-261, 2009.
17. G. Dennler, M. C. Scharber, and C. J. Brabec, "Polymer-fullerene bulkheterojunction solar cells, " Adv. Mater., vol. 21, pp. 1323-1338, 2009.
18. J. van Duren, X. Yang, J. Loos, C. Bulle-Lieuwma, A. Sieval, J. Hummelen, and R. Janssen, "Relating the morphology of poly (p-phenylene vinylene)/methanofullerene blends to solar-cell performance, " Adv. Funct. Mater., vol. 14, pp. 425-434, 2004.
19. R. A. Marsh, C. Groves, and N. C. Greenham, "A microscopic model for the behavior of nanostructured organic photovoltaic devices, " J. Appl. Phys., vol. 101, pp. 083509-1-083509-7, 2007.
20. J. Rostalski and D. Meissner, "Monochromatic versus solar efficiencies of organic solar cells, " Sol. Energy Mater. Sol. Cell., vol. 61, pp. 87-95, 2000.
21. B. Maennig, J. Drechsel, D. Gebeyehu, P. Simon, F. Kozlowski, A. Werner, F. Li, S. Grundmann, S. Sonntag, M. Koch, K. Leo, M. Pfeiffer, H. Hoppe, D. Meissner, N. Sariciftci, I. Riedel, V. Dyakonov, and J. Parisi, "Organic p-i-n solar cells, " Appl. Phys. A, Mater. Sci. Process., vol. 79, pp. 1-14, 2004.
22. J. Xue, B. Rand, S. Uchida, and S. Forrest, "A hybrid planar-mixed molecular heterojunction photovoltaic cell, " Adv. Mater., vol. 17, pp. 66-71, 2005.
23. P. Sullivan, S. Heutz, S. M. Schultes, and T. S. Jones, "Influence of code-position on the performance of CuPc-C60 heterojunction photovoltaic devices, " Appl. Phys. Lett., vol. 84, pp. 1210-1212, 2004.
24. S. Heutz, P. Sullivan, B. M. Sanderson, S. M. Schultes, and T. S. Jones, "Influence of molecular architecture and intermixing on the photovoltaic, morphological and spectroscopic properties of CuPc-C60 heterojunctions, " Sol. Energy Mater. Sol. Cell., vol. 83, pp. 229-245, 2004.
25. F. Yang, M. Shtein, and S. R. Forrest, "Morphology control and material mixing by high-temperature organic vapor-phase deposition and its application to thin-film solar cells, " J. Appl. Phys., vol. 98, pp. 014906-1-014906-10, 2005.
26. C. Mueller, T. A. M. Ferenczi, M. Campoy-Quiles, J. M. Frost, D. D. C. Bradley, P. Smith, N. Stingelin-Stutzmann, and J. Nelson, "Binary organic photovoltaic blends: A simple rationale for optimum compositions, " Adv. Mater., vol. 20, pp. 3510-3515, 2008.
27. O. V. Molodtsova and M. Knupfer, "Electronic properties of the organic semiconductor interfaces CuPc/C60 and C60/CuPc, " J. Appl. Phys., vol. 99, pp. 053704-1-053704-7, 2006.
28. S. Krause, M. B. Casu, A. Schöll, and E. Umbach, "Determination of transport levels of organic semiconductors by UPS and IPS, " New J. Phys., vol. 10, pp. 085001-1-085001-7, 2008.
29. M. L. Tang, A. D. Reichardt, P. Wei, and Z. Bao, "Correlating carrier type with frontier molecular orbital energy levels in organic thin film transistors of functionalized acene derivatives, " J. Amer. Chem. Soc., vol. 131, pp. 5264-5273, 2009.
30. N. Koch, A. C. Dürr, J. Ghijsen, R. L. Johnson, J. J. Pireaux, J. Schwartz, F. Schreiber, H. Dosch, and A. Kahn, "Optically induced electron transfer from conjugated organic molecules to charged metal clusters, " Thin Solid Films, vol. 441, pp. 145-149, 2003.
31. U. Heinemeyer, R. Scholz, L. Gisslén, M. I. Alonso, J. O. Ossó, M. Garriga, A. Hinderhofer, M. Kytka, S. Kowarik, A. Gerlach, and F. Schreiber, "Exciton-phonon coupling in diindenoperylene thin films, " Phys. Rev. B, vol. 78, pp. 085210-1-085210-10, 2008.
32. A. Hinderhofer, U. Heinemeyer, A. Gerlach, S. Kowarik, R. M. J. Jacobs, Y. Sakamoto, T. Suzuki, and F. Schreiber, "Optical properties of pentacene and perfluoropentacene thin films, " J. Chem. Phys., vol. 127, pp. 194705-1-194705-6, 2007.
33. A. Opitz, J. Wagner, M. Bronner, W. Brütting, A. Hinderhofer, and F. Schreiber, "Molecular semiconductor blends: Microstructure, charge carrier transport and application in photovoltaic cells, " Phys. Stat. Sol. (a), vol. 206, pp. 2683-2694, 2009.
34. I. Salzmann, S. Duhm, R. Opitz, R. L. Johnson, J. P. Rabe, and N. Koch, "Structural and electronic properties of pentacene-fullerene heterojunctions, " J. Appl. Phys., vol. 104, pp. 114518-1-114518-11, 2008.
35. V. Shrotriya, G. Li, Y. Yao, T. Moriarty, K. Emery, and Y. Yang, "Accurate measurement and characterization of organic solar cells, " Adv. Funct. Mater., vol. 16, pp. 2016-2023, 2006.
36. T. Stübinger and W. Brütting, "Exciton diffusion and optical interference in organic donor-acceptor photovoltaic cells, " J. Appl. Phys., vol. 90, pp. 3632-3641, 2001.
37. 60, " Phys. Rev. B, vol. 50, pp. 18 543-18 552, 1994.
38. B. P. Rand, J. G. Xue, S. Uchida, and S. R. Forrest, "Mixed donor-acceptor molecular heterojunctions for photovoltaic applications. I. Material properties, " J. Appl. Phys., vol. 98, pp. 124902-1-124902-7, 2005.
39. A. Opitz, M. Bronner, and W. Brütting, "Ambipolar charge carrier transport in mixed organic layers of phthalocyanine and fullerene, " J. Appl. Phys., vol. 101, pp. 063709-1-063709-9, 2007.
40. M. A. Loi, C. Rost-Bietsch, M. Murgia, S. Karg, W. Rieß, and M. Muccini, "Tuning optoelectronic properties of ambipolar organic light-emitting transistors using a bulk-heterojunction approach, " Adv. Funct. Mater., vol. 16, pp. 41-47, 2006.
41. M. Bronner, A. Opitz, and W. Brütting, "Ambipolar charge carrier transport in organic semiconductor blends of phthalocyanine and fullerene, " Phys. Stat. Sol. (a), vol. 205, pp. 549-563, 2008.
42. A. Opitz, M. Bronner, J. Wagner, M. Götzenbrugger, and W. Brütting, "Ambipolar organic semiconductor blends for photovoltaic cells, " Proc. SPIE, vol. 7002, pp. 70020J-1-70020J-9, 2008.
43. A. Opitz, M. Bronner, W. Brütting, M. Himmerlich, J. A. Schaefer, and S. Krischok, "Electronic properties of organic semiconductor blends: Ambipolar mixtures of phthalocyanine and fullerene, " Appl. Phys. Lett., vol. 90, pp. 212112-1-212112-3, 2007.
44. C. Uhrich, D. Wynands, S. Olthof, M. K. Riede, K. Leo, S. Sonntag, B. Maennig, and M. Pfeiffer, "Origin of open circuit voltage in planar and bulk heterojunction organic thin-film photovoltaics depending on doped transport layers, " J. Appl. Phys., vol. 104, pp. 043107-1-043107-6, 2008.
45. D. Wynands, B. Männig, M. Riede, K. Leo, E. Brier, E. Reinold, and P. Bäuerle, "Organic thin film photovoltaic cells based on planar and mixed heterojunctions between fullerene and a low bandgap oligothiophene, " J. Appl. Phys., vol. 106, pp. 054509-1-054509-5, 2009.
46. J. Nelson, J. Kirkpatrick, and P. Ravirajan, "Factors limiting the efficiency of molecular photovoltaic devices, " Phys. Rev. B, vol. 69, pp. 035337-1-035337-11, 2004.
47. 60) heterojunction solar cells: Device performance and degradation mechanisms, " Org. Electron., vol. 9, pp. 656-660, 2008.
48. A. Kumar, S. Sista, and Y. Yang, "Dipole induced anomalous S-shape I-V curves in polymer solar cells, " J. Appl. Phys., vol. 105, pp. 094512-1-094512-6, 2009.
49. M. Glatthaar, M. Riede, N. Keegan, K. Sylvester-Hvida, B. Zimmermann, M. Niggemann, A. Hinsch, and A. Gombert, "Efficiency limiting factors of organic bulk heterojunction solar cells identified by electrical impedance spectroscopy, " Sol. Ener. Mater. Sol. Cell., vol. 91, pp. 390-393, 2007.
50. 60 photovoltaic cells, " Appl. Phys. Lett., vol. 79, pp. 126-128, 2001.
51. P. Peumans, V. Bulović, and S. R. Forrest, "Efficient photon harvesting at high optical intensities in ultrathin organic double- heterostructure photovoltaic diodes, " Appl. Phys. Lett., vol. 76, pp. 2650-2652, 2000.
52. N. Li, B. E. Lassiter, R. R. Lunt, G. Wei, and S. R. Forrest, "Open circuit voltage enhancement due to reduced dark current in small molecule photovoltaic cells, " Appl. Phys. Lett., vol. 94, pp. 023307-1-023307-3, 2009.
53. H. Gommans, B. Verreet, B. P. Rand, R. Muller, J. Poortmans, P. Heremans, and J. Genoe, "On the role of bathocuproine in organic photovoltaic cells, " Adv. Funct. Mater., vol. 18, pp. 3686-3691, 2008.
54. J. Meiss, M. K. Riede, and K. Leo, "Optimizing the morphology of metal multilayer films for indium tin oxide ITO-free inverted organic solar cells, " J. Appl. Phys., vol. 105, pp. 063108-1-063108-5, 2009.
55. M. Knupfer and H. Peisert, "Electronic properties of interfaces between model organic semiconductors and metals, " Phys. Stat. Sol. (a), vol. 201, pp. 1055-1074, 2004.
56. H. Brinkmann, C. Kelting, S. Makarov, O. Tsaryova, G. Schnurpfeil, D. Wöhrle, and D. Schlettwein, "Fluorinated phthalocyanines as molecular semiconductor thin films, " Phys. Stat. Sol. (a), vol. 205, pp. 409-420, 2008.
57. A. Opitz, B. Ecker, J. Wagner, A. Hinderhofer, F. Schreiber, J. Manara, J. Pflaum, and W. Brütting, "Mixed crystalline films of co-evaporated hydrogen-and fluorine-terminated phthalocyanines and their application in photovoltaic devices, " Org. Electron., vol. 10, pp. 1259-1267, 2009.
58. I. Salzmann, S. Duhm, G. Heimel, J. P. Rabe, N. Koch, M. Oehzelt, Y. Sakamoto, and T. Suzuki, "Structural order in perfluoropentacene thin films and heterostructures with pentacene, " Langmuir, vol. 24, pp. 7294-7298, 2008.
59. J.-O. Vogel, I. Salzmann, R. Opitz, S. Duhm, B. Nickel, J. P. Rabe, and N. Koch, "Sub-nanometer control of the interlayer spacing in thin films of intercalated rodlike conjugated molecules, " J. Phys. Chem. B, vol. 111, pp. 14 097-14 101, 2007.
60. M. Kröger, S. Hamwi, J. Meyer, T. Dobbertin, T. Riedl, W. Kowalsky, and H.-H. Johannes, "Temperature-independent field-induced charge separation at doped organic/organic interfaces: Experimental modeling of electrical properties, " Phys. Rev. B, vol. 75, pp. 235321-1-235321-8, 2007.
61. A. Facchetti, "Semiconductors for organic transistors, " Mater. Today, vol. 10, pp. 28-37, 2007.
62. 60 heterojunctions, " Appl. Phys. Lett., vol. 85, pp. 5427-5429, 2004.
63. 60 small molecule based organic solar cells, " Appl. Phys. Lett., vol. 89, pp. 213506-1-213506-3, 2006.
64. A. C. Dürr, F. Schreiber, M. Münch, N. Karl, B. Krause, V. Kruppa, and H. Dosch, "High structural order in thin films of the organic semiconductor diindenoperylene, " Appl. Phys. Lett., vol. 81, pp. 2276-2278, 2002.
65. R. Resel, N. Koch, F. Meghdadi, G. Leising, W. Unzog, and K. Reichmann, "Growth and preferred crystallographic orientation of hexaphenyl thin films, " Thin Solid Films, vol. 305, pp. 232-242, 1997.
66. B. Servet, S. Ries, M. Trotel, P. Alnot, G. Horowitz, and F. Garnier, "X-ray determination of the crystal structure and orientation of vacuum evaporated sexithiophene films, " Adv. Mater., vol. 5, pp. 461-464, 1993.
67. D. Fujishima, H. Kanno, T. Kinoshita, E. Maruyama, M. Tanaka, M. Shirakawa, and K. Shibata, "Organic thin-film solar cell employing a novel electron-donor material, " Sol. Ener. Mater. Sol. Cell., vol. 93, pp. 1029-1032, 2009.
68. A. K. Tripathi and J. Pflaum, "Correlation between ambipolar transport and structural phase transition in diindenoperylene single crystals, " Appl. Phys. Lett., vol. 89, pp. 082103-1-082103-3, 2006.
69. D. Kurrle and J. Pflaum, "Exciton diffusion length in the organic semiconductor diindenoperylene, " Appl. Phys. Lett., vol. 92, pp. 133306-1-133306-3, 2008.
70. R. R. Lunt, J. B. Benziger, and S. R. Forrest, "Relationship between crystalline order and exciton diffusion length in molecular organic semiconductors, " Adv. Mater., vol. 22, pp. 1233-1236, 2010.
71. J. Wagner, M. Gruber, A. Wilke, A. Hinderhofer, A. Vollmer, A. Opitz, N. Koch, F. Schreiber, and W. Brütting, "High fill factor and open circuit voltage in organic photovoltaic cells with diindenoperylene as donor material, " submitted for publication.
72. B. P. Rand, D. P. Burk, and S. R. Forrest, "Offset energies at organic semiconductor heterojunctions and their influence on the open-circuit voltage of thin-film solar cells, " Phys. Rev. B, vol. 75, pp. 115327-1-115327-11, 2007.
73. 60 blends as model systems for photovoltaic devices, " Synthetic Met., vol. 84, pp. 971-972, 1997.
74. 60 bulk-heterojunction solar cells, " J. Vac. Sci. Technol. A, vol. 24, pp. 645-648, 2006.
75. 60 and pentacene nanocolumns, " Appl. Phys. Lett., vol. 90, pp. 193117-1-193117-3, 2007.
76. M.-S. Kim, J.-S. Kim, J. C. Cho, M. Shtein, L. J. Guo, and J. Kim, "Flexible conjugated polymer photovoltaic cells with controlled heterojunctions fabricated using nanoimprint lithography, " Appl. Phys. Lett., vol. 90, pp. 123113-1-123113-3, 2007.
77. D. Cheyns, K. Vasseur, C. Rolin, J. Genoe, J. Poortmans, and P. Heremans, "Nanoimprinted semiconducting polymer films with 50 nm features and their application to organic heterojunction solar cells, " Nanotechnology, vol. 19, pp. 424016-1-424016-6, 2008.