American Physical Society Sites|APS|Journals|PhysicsCentral|Physics

Session A16: Focus Session: Spin-Dependent Physics in Organic Compounds

8:00 AM–10:48 AM, Monday, March 18, 2013
Room: 318

Sponsoring Units: GMAG DMP
Chair: Christoph Boehme, University of Utah

Abstract ID: BAPS.2013.MAR.A16.2

Abstract: A16.00002 : Recent Advance in Organic Spintronics and Magnetic Field Effect*

8:36 AM–9:12 AM

Preview Abstract      Abstract  

Author:

Z. Valy Vardeny
(University of Utah)

In this talk several important advances in the field of Organic Spintronics and magnetic field effect (MFE) of organic films and optoelectronic devices that have occurred during the past two years from the Utah group will be surveyed and discussed. (i) Organic Spintronics: We demonstrated spin organic light emitting diode (spin-OLED) using two FM injecting electrodes, where the electroluminescence depends on the mutual orientation of the electrode magnetization directions [1]. This development has opened up research studies into organic spin-valves (OSV) in the space-charge limited current regime. (ii) Magnetic field effect: We demonstrated that the photoinduced absorption spectrum in organic \textit{films} (where current is not involved) show pronounced MFE [2]. This unravels the underlying mechanism of the MFE in organic devices, to be more in agreement with the field of MFE in Biochemistry. (iii) Spin effects in organic optoelectronic devices: We demonstrated that certain spin 1/2 radical additives to donor-acceptor blends substantially enhance the power conversion efficiency of organic photovoltaic (OPV) solar cells [3]. This effect shows that studies of spin response and MFE in OPV devices are promising.\\[4pt] In collaboration with T. Nguyen, E. Ehrenfreund, B. Gautam, Y. Zhang and T. Basel.\\[4pt] [1] Nguyen \textit{et al}., \textit{Science} 337, 204 (2012);\\[0pt] [2] Gautam \textit{et al}. PRB 85, 205207 (2012);\\[0pt] [3] Zhang \textit{et al}. \textit{Nature Commun}. 3, 1043 (2012).

*Supported by the DOE grant 04ER46109 [1]; NSF Grant {\#} DMR-1104495 and MSF-MRSEC program DMR-1121252 [2,3].

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2013.MAR.A16.2