Experimental and theoretical investigation of MEH-ppv based Schottky diodes
MEH-PPV (poly[2-methoxy-5-(2?-ethyl-hexyloxy)-1,4-phenylene vinylene]) based Schottky diodes have been fabricated and investigated through the analyses of current densityvoltage and capacitancevoltage characteristics. Temperature-dependent hole mobility of MEH-PPV is extracted by the space-charge limited conduction (SCLC) model from 300 to 400 K, and the use of the SCLC model is examined in high electric field. The highest measured hole mobility is 0.013 cm2/Vs at 353 K. The thickness of MEH-PPV in the structures consisting of ITO/MEH-PPV/Al, largely affects the performance of the diodes, and the thinner film displays better device performance. According to capacitancevoltage relations, the effective carrier density and Schottky barrier height of MEH-PPV have been determined to be 2.241017 cm?3 and 0.64 eV, respectively.
meh-ppv mobility sclc polymer schottky diodes