Does Electron Delocalization Influence Charge Separation at Donor–Acceptor Interfaces in Organic Photovoltaic Cells?
Source abstract
Abstract
We use bilayer devices with a series of three fullerene acceptors differing in order and intermolecular coupling to systematically explore the influence of electron delocalization in the acceptor phase on the dissociation efficiency of charge transfer states. Structural information from GIWAXS measurements is combined with the results of optical and electrical characterization as well as theoretical modeling. Our results indicate that an increase in CT-dissociation efficiency is directly coupled to an enhancement in electron delocalization that is particularly prominent for C 60 which forms crystalline domains. Therefore, our results substantiate the concept of delocalization of electrons taking a positive role in the charge separation process, and of acceptor crystallinity being crucial in this respect.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Molecular Junctions and Nanostructures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Soft Matter Optoelectronics, Department of Physics, University of Bayreuth, 95447 Bayreuth, Germany
Macromolecular Chemistry I, Department of Chemistry, University of Bayreuth, 95447 Bayreuth, Germany
Department of Chemistry, University of Cologne, 50939 Cologne, Germany
Herzig Group, Munich School of Engineering, Technical University Munich, 85748 Garching, Germany
Dynamics and Structure Formation − Herzig Group, Department of Physics, University of Bayreuth, 95447 Bayreuth, Germany
Funding
Elitenetzwerk Bayern · Deutsche Forschungsgemeinschaft · Bayerisches Staatsministerium f?r Wissenschaft, Forschung und Kunst · Volkswagen Foundation
References (85)
Show source-provided references
1. 10.1038/ncomms1309410.1038/ncomms13094 ↗
2. 10.1002/adma.20160028110.1002/adma.201600281 ↗
3. 10.1021/jacs.7b0267710.1021/jacs.7b02677 ↗
4. 10.1002/adma.20160424110.1002/adma.201604241 ↗
5. 10.1002/adma.20180086810.1002/adma.201800868 ↗
6. 10.1039/C4CP01872A10.1039/C4CP01872A ↗
7. 10.1039/C4CP01814A10.1039/C4CP01814A ↗
8. 10.1039/C4CP01883D10.1039/C4CP01883D ↗
9. 10.1039/C4CP01776E10.1039/C4CP01776E ↗
10. 10.1038/ncomms333410.1038/ncomms3334 ↗
11. 10.1021/acs.jpclett.7b0059510.1021/acs.jpclett.7b00595 ↗
12. 10.1021/cr900271s10.1021/cr900271s ↗
13. 10.1007/128_2011_21810.1007/128_2011_218 ↗
14. 10.1038/nmat380710.1038/nmat3807 ↗
15. 10.1038/nphoton.2009.6910.1038/nphoton.2009.69 ↗
16. 10.1103/PhysRevB.85.15520110.1103/PhysRevB.85.155201 ↗
17. 10.1002/pssr.20080211010.1002/pssr.200802110 ↗
18. 10.1021/acs.jpclett.6b0217810.1021/acs.jpclett.6b02178 ↗
19. 10.1021/jz201240310.1021/jz2012403 ↗
20. 10.1021/acs.jpcc.8b0343210.1021/acs.jpcc.8b03432 ↗
21. 10.1002/adma.20130528310.1002/adma.201305283 ↗
22. 10.1021/jp302275z10.1021/jp302275z ↗
23. 10.1021/ja076568q10.1021/ja076568q ↗
24. 10.1002/adfm.20140378410.1002/adfm.201403784 ↗
25. 10.1002/aenm.20160132510.1002/aenm.201601325 ↗
26. 10.1021/acsami.7b0219310.1021/acsami.7b02193 ↗
27. 10.1002/aenm.20160142710.1002/aenm.201601427 ↗
28. 10.1021/acsnano.6b0286510.1021/acsnano.6b02865 ↗
29. 10.1038/srep3291410.1038/srep32914 ↗
30. 10.1038/ncomms424510.1038/ncomms4245 ↗
31. 10.1021/acs.jpcb.5b0513810.1021/acs.jpcb.5b05138 ↗
32. 10.1103/PhysRevB.87.15520510.1103/PhysRevB.87.155205 ↗
33. 10.1021/cr050140x10.1021/cr050140x ↗
34. Köhler A. · 2015 · 42410.1002/9783527685172 ↗
35. 10.1021/acs.jpcc.5b1080110.1021/acs.jpcc.5b10801 ↗
36. 10.1002/aenm.20140092210.1002/aenm.201400922 ↗
37. 10.1021/acs.jpclett.8b0029210.1021/acs.jpclett.8b00292 ↗
38. 10.1002/polb.2425910.1002/polb.24259 ↗
39. 10.1002/adfm.20140115310.1002/adfm.201401153 ↗
40. 10.1021/jacs.6b0513110.1021/jacs.6b05131 ↗
41. 10.1021/ja073181e10.1021/ja073181e ↗
42. 10.1107/S160057671500443410.1107/S1600576715004434 ↗
43. 10.1002/adma.20100088310.1002/adma.201000883 ↗
44. Polyanskiy, M. N. Refractive Index Database. https://refractiveindex.info (accessed Aug 16, 2017).
45. 10.1016/j.apsusc.2015.05.02710.1016/j.apsusc.2015.05.027 ↗
46. 10.1021/ma502122710.1021/ma5021227 ↗
47. 10.1016/j.orgel.2012.01.03610.1016/j.orgel.2012.01.036 ↗
48. 10.1016/j.synthmet.2005.02.00110.1016/j.synthmet.2005.02.001 ↗
49. Tress W. · 2014 · 47410.1007/978-3-319-10097-5 ↗
50. 10.1016/j.orgel.2014.08.01310.1016/j.orgel.2014.08.013 ↗
51. 10.1016/j.orgel.2010.07.02310.1016/j.orgel.2010.07.023 ↗
52. 10.1063/1.362693810.1063/1.3626938 ↗
53. 10.1021/jp910005g10.1021/jp910005g ↗
54. 10.1557/JMR.1996.039910.1557/JMR.1996.0399 ↗
55. 10.1016/j.carbon.2004.11.00710.1016/j.carbon.2004.11.007 ↗
56. 10.1002/adfm.20040052110.1002/adfm.200400521 ↗
57. 10.1063/1.331587210.1063/1.3315872 ↗
58. 10.1021/jz400227c10.1021/jz400227c ↗
59. 10.1021/jp104916710.1021/jp1049167 ↗
60. 10.1021/acs.jpcc.6b0847110.1021/acs.jpcc.6b08471 ↗
61. 10.1103/PhysRevB.58.768910.1103/PhysRevB.58.7689 ↗
62. 10.1002/adfm.20160490610.1002/adfm.201604906 ↗
63. Tress W. · 2014 · 47410.1007/978-3-319-10097-5 ↗
64. 10.1038/ncomms808310.1038/ncomms8083 ↗
65. 10.1063/1.355376410.1063/1.3553764 ↗
66. Tress W. · 2014 · 47410.1007/978-3-319-10097-5 ↗
67. 10.1016/0301-0104(81)85055-010.1016/0301-0104(81)85055-0 ↗
68. 10.1103/PhysRevB.60.865010.1103/PhysRevB.60.8650 ↗
69. 10.1002/admi.20150042210.1002/admi.201500422 ↗
70. 10.1039/C4CP01251H10.1039/C4CP01251H ↗
71. 10.1103/PhysRevB.82.07520710.1103/PhysRevB.82.075207 ↗
72. 10.1021/ar900099h10.1021/ar900099h ↗
73. 10.1063/1.214207210.1063/1.2142072 ↗
74. 10.1021/acs.jpcc.7b0228810.1021/acs.jpcc.7b02288 ↗
75. Mihailetchi, V. D. Device Physics of Organic Bulk Heterojunction Solar Cells. Ph.D. Thesis, University of Gronigen, Gronigen, The Netherlands, 2005.
76. 10.1021/ja801259810.1021/ja8012598 ↗
77. 10.1002/adma.20100101010.1002/adma.201001010 ↗
78. 10.1021/ja301757y10.1021/ja301757y ↗
79. 10.1021/jp205731f10.1021/jp205731f ↗
80. 10.1002/aenm.20120067310.1002/aenm.201200673 ↗
81. 10.1063/1.174954110.1063/1.1749541 ↗
82. 10.1103/PhysRev.54.55410.1103/PhysRev.54.554 ↗
83. 10.1063/1.44724310.1063/1.447243 ↗
84. 10.1038/nmat506310.1038/nmat5063 ↗
85. 10.1021/acs.accounts.5b0019910.1021/acs.accounts.5b00199 ↗