Photoluminescence and Electroluminescence from Polymer-Like Organic Thin Films Deposited by Plasma-Enhanced Chemical Vapor Deposition Using Para-Xylene as Precursor

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Abstract
Photoluminescence (PL) and electroluminescence (EL) were observed from the polymer-like organic thin films (POTFs) deposited by plasma-enhanced chemical vapor deposition (PECVD) using p-xylene as the precursor. Absorption and PL spectra suggested that the film includes visible-light-luminescing species. The PL spectrum had a peak around 460 nm. Current-voltage (I-V) and luminescence-voltage (L-V) were measured from the aluminum/POTF/indium-tin-oxide light-emitting diode (LED). L-V curve follows the I-V curve showing a turn-on voltage of ∼ 2.5 V. The EL spectrum from the LED was similar to the PL spectrum.