Successful fabrication and characterization of V[TCNE]$_x$-based hybrid spin-LED*

V(TCNE)$_x$ (x$\sim$2) is a fully spin polarized organic-based magnet with an ordering temperature above room temperature (T$_c$ $>$ 350 K). Chemical vapor deposited (CVD) magnetic V[TCNE]$_x$ films also exhibit semiconductor-like charge transport behavior with a room temperature conductivity of 10$^{-2}$ S/cm and activation energy of $\sim$ 0.5 eV. Electronic transport through V[TCNE]$_x$ leads to spin-polarization of free carriers due to splitting of the $\pi^{\ast}$ band in [TCNE]$^-$ into two subbands (occupied: $\pi^{\ast}$ and unoccupied: $\pi^{\ast} +$ U$_c$ ) with opposite spin polarization, driven by on-site Coulomb repulsion. We have successfully constructed a hybrid III-V/V[TCNE]$_x$ spin light emitting diode (spin-LED) device and investigated its electrical and magnetic properties. We observed strong temperature dependence of the turn on voltage and positive magnetoresistance, indicating charge flow through the V[TCNE]$_x$ layer ($\sim$ 400 nm). Detailed electrical characterization of the hybrid device and fabrication techniques will be presented and implications for the optical detection of electrical spin injection in hybrid organic/inorganic devices will be discussed.