Publication Type |
Journal Article |
School or College |
College of Science |
Department |
Physics |
Creator |
Vardeny, Zeev Valentine |
Other Author |
Aryanpour, K.; Sheng, C.-X.; Olejnik, E.; Pandit, B.; Psiachos, D.; Mazumdar, S. |
Title |
Evidence for excimer photoexcitations in an ordered ?-conjugated polymer film |
Date |
2011 |
Description |
We report pressure-dependent transient picosecond and continuous-wave photomodulation studies of disordered and ordered films of 2-methoxy-5-(2-ethylhexyloxy) poly(para-phenylenevinylene). Photoinduced absorption (PA) bands in the disordered film exhibit very weak pressure dependence and are assigned to intrachain excitons and polarons. In contrast, the ordered film exhibits two additional transient PA bands in the midinfrared that blueshift dramatically with pressure. Based on high-order configuration interaction calculations, we ascribe the PA bands in the ordered film to excimers. Our work brings insight to the exciton binding energy in ordered films versus disordered films and solutions. The reduced exciton binding energy in ordered films is due to energy states appearing below the continuum band threshold of the single strand. |
Type |
Text |
Publisher |
American Physical Society |
Volume |
83 |
Issue |
15 |
First Page |
155124 |
Last Page |
155121 |
DOI |
10.1103/PhysRevB.83.155124 |
Language |
eng |
Bibliographic Citation |
Aryanpour, K., Sheng, C.-X., Olejnik, E., Pandit, B., Psiachos, D., Mazumdar, S., & Vardeny, Z. V. (2011). Evidence for excimer photoexcitations in an ordered ?-conjugated polymer film. Physical Review B - Condensed Matter and Materials Physics, 83(15), 155124-1-155124-5. |
Rights Management |
© American Physical Society, http://dx.doi.org/10.1103/PhysRevB.83.155124. |
Format Medium |
application/pdf |
Format Extent |
362,850 bytes |
Identifier |
ir-main,17072 |
ARK |
ark:/87278/s6417f5c |
Setname |
ir_uspace |
ID |
702579 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6417f5c |