Polypyrrole doped with CdS quantum dots as a photosensitive near infrared photodetector
Paper ID : 1249-ICNS
Naader Alizadeh, Mahsa Amiri *
Department of Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, Iran
photoconductive films based on conducting polypyrrole (PPy) and polypyrrole doped with different concentrations of CdS quantum dots (PPy/CdS QDs) used as photoactive material in near-infrared (NIR) photodetector. The photoconductive films were fabricated by electrospray coating. The prepared organic photodetectors produced a photocurrent of 62.6 µA and showed good photosensitivity (313.3) in 850 nm. When the PPy doped with CdS QDs during the chemical polymerization, the performance of the photodetector had a significant improvement as it generated higher photocurrent. The results showed that the PPy doped with 22 ppm of CdS QDs had photosensitivity of about 1800. This evaluation was attributed to the generation of the charge carriers in PPy film and also the increased mobility of generated charge carriers in the PPy/CdS QDs when illuminated with NIR. So, the presented high sensitive and low-cost organic photodetector based on PPy/CdS QDs makes it suitable for NIR photodetection and organic electronic devices.
Polypyrrole, Organic photodetcor, Near infrared, Photoconductivity
Status : Abstract Accepted (Poster Presentation)