Booker, E. P., Bayliss, S. L. , Jen, A., Rao, A. and Greenham, N. C. (2019) Magnetic field modulation of recombination processes in organic photovoltaics. IEEE Journal of Photovoltaics, 9(2), pp. 460-463. (doi: 10.1109/JPHOTOV.2018.2889574)
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Abstract
Polymer-Fullerene photovoltaics have potential in small-scale power production, but low open-circuit voltages limit their efficiency. Understanding the processes affecting the charge recombination rate is key to increasing device efficiency through optimizing open-circuit voltage. Most of the polymer-fullerene systems have an intramolecular triplet exciton state lower in energy than the interfacial charge-transfer state, and its formation can provide a terminal recombination pathway that may limit device performance. We used magnetic fields to modulate intersystem crossing in a prototypical system and monitored the effect on the open-circuit voltage to infer changes in the steady-state carrier density and hence in the net recombination rate constant. We analyzed these effects using density matrix modeling and quantified the various recombination rate constants for a working device.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Bayliss, Dr Sam |
| Authors: | Booker, E. P., Bayliss, S. L., Jen, A., Rao, A., and Greenham, N. C. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | IEEE Journal of Photovoltaics |
| Publisher: | IEEE |
| ISSN: | 2156-3381 |
| ISSN (Online): | 2156-3403 |
| Published Online: | 18 January 2019 |
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