Publication Type |
Journal Article |
School or College |
College of Science |
Department |
Physics |
Creator |
Vardeny, Zeev Valentine |
Other Author |
Yang, C.; Liu, C. |
Title |
Optical studies of spin coherence in organic semiconductors |
Date |
2005 |
Description |
Spin coherence in organic oligomer and polymer semiconductors is a crucial property in determining the performance of organic spin devices. Using the techniques of photo-induced absorption (PA) detected magnetic resonance (PADMR) and photoluminescence (PL) detected magnetic resonance (PLDMR), we have studied the influence of temperature, conjugation length, excitation energy, magnetic nano-particles mixing, and in-chain heavy metal atoms on the spin coherence in organic semiconductors. From the PADMR measurements in addition, we could infer the formation ratio of singlet/triplet excitons from electron-hole pairs in these materials, and found that the formation of singlet excitons is preferred in polymers. We also found that spin randomization induced by magnetic nanoparticles or heavy atoms lead to faster polaron recombination dynamics and lack of optically detected magnetic resonance signal. |
Type |
Text |
Publisher |
American Institute of Physics (AIP) |
Volume |
772 |
First Page |
1407 |
Last Page |
1408 |
DOI |
10.1063/1.1994641 |
citatation_issn |
0094243X |
Subject |
Spin coherence; Organic spin devices |
Subject LCSH |
Organic semiconductors -- Optical properties |
Language |
eng |
Conference Title |
PHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors - ICPS-27; 26-30 July 2004; Flagstaff, Arizona (USA) |
Bibliographic Citation |
Yang, C., Liu, C., & Vardeny, Z. V. (2005). Optical studies of spin coherence in organic semiconductors. AIP Conference Proceedings, 772, 1407-8. |
Rights Management |
(c)American Institute of Physics. The following article appeared in Yang, C., Liu, C., & Vardeny, Z. V., AIP Conference Proceedings, 772, 2005 and may be found at http://dx.doi.org/10.1063/1.1994641 |
Format Medium |
application/pdf |
Format Extent |
173,466 bytes |
Identifier |
ir-main,10065 |
ARK |
ark:/87278/s64t72rc |
Setname |
ir_uspace |
ID |
705099 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s64t72rc |