Hyperfine interaction in spin response of organic devices

Tho D. Nguyen; Golda Hukic-Markosian; Fujian Wang; Leonard Wojcik; Xiao-Guang Li; Eitan Ehrenfreund; Z. Valy Vardeny

doi:10.1117/12.860057

24 August 2010 Hyperfine interaction in spin response of organic devices

Tho D. Nguyen, Golda Hukic-Markosian, Fujian Wang, Leonard Wojcik, Xiao-Guang Li, Eitan Ehrenfreund, Z. Valy Vardeny

Proceedings Volume 7760, Spintronics III; 77601A (2010) https://doi.org/10.1117/12.860057
Event: SPIE NanoScience + Engineering, 2010, San Diego, California, United States

Abstract

Recent advances in spin response of organic semiconductors include long polaron spin coherence time measured by optically detected magnetic resonance (ODMR); substantive room-temperature magneto-electroluminescence and magneto-conductance obtained in organic light emitting diodes (OLED); and spin-polarized carrier injection from ferromagnetic electrodes in organic spin valves (OSV). Although the hyperfine interaction (HFI) has been foreseen to play an important role in organic spin response, clear experimental evidence has been lacking. Using the chemical versatility advantage of the organics, we studied and compared spin responses in films, OLED and OSV devices based on π-conjugated polymers made of protonated, H-, and deuterated, D-hydrogen having a weaker HFI strength. We demonstrate that the HFI plays a crucial role in all three spin responses. OLEDs and films based on the D-polymers show substantial narrower magneto-electroluminescence, magneto-conductivity and ODMR responses; whereas due to the longer spin diffusion, OSV devices based on D-polymers show substantially larger magnetoresistance that reaches ~330% at small bias voltage and low temperatures.

Citation Download Citation

Tho D. Nguyen, Golda Hukic-Markosian, Fujian Wang, Leonard Wojcik, Xiao-Guang Li, Eitan Ehrenfreund, and Z. Valy Vardeny "Hyperfine interaction in spin response of organic devices", Proc. SPIE 7760, Spintronics III, 77601A (24 August 2010); https://doi.org/10.1117/12.860057

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Polymers

Magnetism

Electrodes

Organic light emitting diodes

Polarons

Data modeling

Fermium

Show All Keywords

Keywords/Phrases

Search In:

Publication Years