Enhancing the Photoluminescence Emission of Conjugated MEH-PPV by Light Processing
Source abstract
Abstract
We show here that treatment of thin films of conjugated polymers by illumination with light leads to an increase of the intensity of their photoluminescence by up to 42%. The corresponding enhancement of absorbance was much less pronounced. We explain this significant enhancement of photoluminescence by a planarization of the conjugated polymer chains induced by photoexcitations even below the glass transition temperature, possibly due to an increased conjugation length. Interestingly, the photoluminescence remains at the enhanced level for more than 71 h after treatment of the films by illumination with light, likely due to the fact that below the glass transition temperature no restoring force could return the conjugated chains into their initial conformational state.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Organic Light-Emitting Diodes Research · Conducting polymers and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Freiburg Institute for Advanced Studies, Albertstraße 19, Freiburg 79104, Germany
Department of Materials, Imperial College London, Exhibition Road, London, SW7 2AZ, United Kingdom
Nanobiophotonics and Laser Microspectroscopy Center, Faculty of Physics and Interdisciplinary Research Institute in Bio-Nano-Sciences, Babes-Bolyai University, Treboniu Laurian Street 42, Cluj Napoca 400271, Romania
Institute of Physics, University of Freiburg, Hermann-Herder Straße 3, Freiburg 79104, Germany
Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan
References (37)
Show source-provided references
1. Mikhnenko O. V. · Energy Environ. Sci. · 2012 · 5 · 696010.1039/c2ee03466b ↗
2. Köhler A. · Nature · 1998 · 392 · 90310.1038/31901 ↗
3. Hwang I. · Chem. Mater. · 2011 · 23 · 61010.1021/cm102360x ↗
4. Collini E. · Science · 2009 · 323 · 36910.1126/science.1164016 ↗
5. Bolinger J. C. · Science · 2011 · 331 · 56510.1126/science.1199140 ↗
6. Clarke T. M. · Org. Electron. · 2012 · 13 · 263910.1016/j.orgel.2012.07.037 ↗
7. Como E. D. · J. Am. Chem. Soc. · 2011 · 133 · 369010.1021/ja109342t ↗
8. Dubin F. · Nat. Phys. · 2006 · 2 · 3210.1038/nphys196 ↗
9. Darling S. B. · J. Phys. Chem. B · 2008 · 112 · 889110.1021/jp8017919 ↗
10. Bounos G. · J. Am. Chem. Soc. · 2011 · 133 · 1015510.1021/ja2006687 ↗
11. Johns J. E. · J. Am. Chem. Soc. · 2010 · 132 · 1572010.1021/ja1066866 ↗
12. Choi S. H. · Science · 2008 · 320 · 148210.1126/science.1156538 ↗
13. Müller C. · Macromolecules · 2011 · 44 · 122110.1021/ma102529f ↗
14. Paquin F. · Phys. Rev. Lett. · 2011 · 106 · 19740110.1103/PhysRevLett.106.197401 ↗
15. Nguyen T.-Q. · Science · 2000 · 288 · 65210.1126/science.288.5466.652 ↗
16. Scholes G. D. · Nat. Mater. · 2006 · 5 · 68310.1038/nmat1710 ↗
17. Aryanpour K. · Phys. Rev. B · 2011 · 83 · 15512410.1103/PhysRevB.83.155124 ↗
18. Nan G. · Phys. Chem. Chem. Phys. · 2011 · 13 · 973610.1039/c1cp00001b ↗
19. Kocherzhenko A. A. · Phys. Chem. Chem. Phys. · 2011 · 13 · 209610.1039/C0CP01432J ↗
20. Khan A. L. T. · Phys. Rev. B · 2004 · 69 · 08520110.1103/PhysRevB.69.085201 ↗
21. Botiz I. · 2011 · 242 · 11710.1007/12_2010_67 ↗
22. Jahanshahi K. · Macromolecules · 2013 · 46 · 147010.1021/ma3024602 ↗
23. Verploegen E. · Adv. Funct. Mater. · 2010 · 20 · 351910.1002/adfm.201000975 ↗
24. Vogelsang J. · Nat. Mater. · 2011 · 10 · 94210.1038/nmat3127 ↗
25. Verduzco R. · Macromolecules · 2011 · 44 · 53010.1021/ma102728z ↗
26. Botiz I. · Macromolecules · 2009 · 42 · 821110.1021/ma901420h ↗
27. Heun S. · J. Phys.: Condens. Matter · 1993 · 5 · 247
28. Hagler T. W. · Phys. Rev. B · 1991 · 44 · 865210.1103/PhysRevB.44.8652 ↗
29. Burroughes J. H. · Nature · 1990 · 347 · 53910.1038/347539a0 ↗
30. Botiz I. · Macromolecules · 2013 · 46 · 235210.1021/ma400120z ↗
31. Kumar J. · Appl. Phys. Lett. · 1998 · 72 · 209610.1063/1.121287 ↗
32. Karageorgiev P. · Nat. Mater. · 2005 · 4 · 69910.1038/nmat1459 ↗
33. Tretiak S. · Phys. Rev. Lett. · 2002 · 89 · 09740210.1103/PhysRevLett.89.097402 ↗
34. Hernandez V. · Phys. Rev. B · 1994 · 50 · 981510.1103/PhysRevB.50.9815 ↗
35. Strickler S. J. · J. Chem. Phys. · 1962 · 37 · 81410.1063/1.1733166 ↗
36. Birks J. B. · Proc. R. Soc. London, Ser. A · 1963 · 275 · 13510.1098/rspa.1963.0159 ↗
37. Chowdhury M. · Phys. Rev. Lett. · 2012 · 109 · 13610210.1103/PhysRevLett.109.136102 ↗