Adachi, Takuji and Vogelsang, Jan and Lupton, John M. (2014) Unraveling the Electronic Heterogeneity of Charge Traps in Conjugated Polymers by Single-Molecule Spectroscopy. JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 5 (3). pp. 573-577. ISSN 1948-7185,
Full text not available from this repository. (Request a copy)Abstract
Charge trapping is taken for granted in modeling the characteristics of organic semiconductor devices, but very few techniques actually exist to spectroscopically pinpoint trap states. For example, trap levels are often assumed to be discrete in energy. Using the well-known keto defect in polyfluorene as a model, we demonstrate how single. molecule spectroscopy can directly track the formation of charge and exciton traps in conjugated polymers in real time, providing crucial information on the energetic distribution of trap sites relative to the polymer optical gap. Charge traps with universal spectral fingerprints scatter by almost 1 eV in depth, implying that substantial heterogeneity must be taken into account when modeling devices.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CHAIN DEFECT EMISSION; GREEN EMISSION; KETO DEFECT; ORIGIN; STATES; ELECTROLUMINESCENCE; SEMICONDUCTORS; RECOMBINATION; POLYFLUORENES; DEGRADATION; |
| Subjects: | 500 Science > 530 Physics 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group John Lupton |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Nov 2019 10:13 |
| Last Modified: | 27 Nov 2019 10:13 |
| URI: | https://pred.uni-regensburg.de/id/eprint/10682 |
Actions (login required)
 |
View Item |
