Photodetector Biased on ZnO Nanoparticles/Poly-TPD Organic Material

In the present study, a photodetector was prepared by depositing PEDO TPSS and TPD polymer on porous silicon (PSi) substrates using spin coating technique. The response time of the manufactured PSi/PEDOTPSS/TPD detector (by illuminating the sample with a ۲۵۰ W/cm۲ tungsten lamp) was ۸.۸۳s and measured in the second scale. The detection, specific detectivity, and responsivity of the both detectors were found as ۳.۳۹۵x۱۰۹W-۱, ۱.۹۶۷x۱۰۹ W-۱ Hz۱/۲ cm and ۵.۱۸۸x۱۰-۳ A/W, respectively. The incorporation of ZnO nanoparticles with a TPD polymer improved the detection, specific detectivity, optical response, and detector response time to ۷۴.۶۲x۱۰۹ W-۱, ۴۳.۲۵x۱۰۹ W-۱ Hz ۱/۲ cm ,۱۸۹۳.۱۶x۱۰-۳ A/W, and ۱.۰۶۰۶۶ s, respectively. The Hall Effect measurements revealed that the n-type nanoparticles have the carrier concentration around -۳.۹۰×۱۰۱۷ cm-۳.