Document Details Document Type : Article In Journal  Document Title : Graphene controlled organic photodetectors Graphene controlled organic photodetectors   Subject : physics  Document Language : English  Abstract : Drop casting deposition technique was used to fabricate graphene oxide doped methylene blue (GO doped MB) photodiode, Al/p-Si/GO doped MB/Au. The effects of illumination on the current voltage (I-V) characteristics of the Al/p-Si/GO doped MB/Au Schottky diode for optical sensing applications were explored. The reverse current of the diode in the reverse bias increases with the increasing illumination intensities. The obtained trends for both ideality factor and barrier height are in agreement, suggesting that they are both affected by GO doping. The photosensitivity of the photodiodes was investigated. The highest photosensitivity was observed for the diode having 0.03 GO:MB ratio with I-photo/I-dark ratio of 8.67 x 10(3) at 100 mW/cm(2) under 10 V. The rectification ratio was of the order of 10(4). In addition, the capacitance voltage (C-V) and conductance voltage (G-V) measurements of the diode were studied in the frequency range of 10 kHz-1 MHz. The measured values of the capacitance decrease with the increasing frequency. The decrease in capacitance was explained on the basis of interface states. The photoelectrical properties of Al/p-Si/GO doped MB/Au devices indicate that the prepared diodes can be used both as a photodiode and a photocapacitor in optoelectronic device applications  ISSN : 0379-6779  Journal Name : SYNTHETIC METALS  Volume : 217  Issue Number : 1  Publishing Year : 1437 AH 2016 AD  Article Type : Article  Added Date : Thursday, August 10, 2017  Researchers Researcher Name (Arabic) Researcher Name (English) Researcher Type Dr Grade Email A Mekki Mekki, A Investigator Doctorate   A Dere Dere, A Researcher Doctorate   k Mensah-Darkwa Mensah-Darkwa, k Researcher Doctorate   A.A Al-Ghamdi, Al-Ghamdi, A.A Researcher Doctorate   R.K Gupta, Gupta,, R.K Researcher Doctorate   W. A. Farouk Farouk, W. A Researcher Doctorate   k Harrabi Harrabi, k Researcher Doctorate   Farid El-Tantawy El-Tantawy, Farid Researcher Doctorate   F Yakuphanoglu Yakuphanoglu, F Researcher Doctorate fyhanoglu@firat.edu.tr Files File Name Type Description  42567.pdf pdf   Back To Researches Page