Document Details Document Type : Article In Journal  Document Title : Organic Semiconductor: Graphene-Oxide/p-Si Photodiodes Organic Semiconductor: Graphene-Oxide/p-Si Photodiodes   Subject : physics  Document Language : English  Abstract : The device parameters of Al/p-Si/PCBM:GO/Au diodes were investigated using direct current voltage (I-V), photocurrent and impedance spectroscopy. The ideality factor of the diode was found to depend significantly on GO content. The calculated barrier heights had low variance over the range of illumination intensities per doping level. Under dark conditions the barrier height averaged 0.767 with a variance of less than 40 parts per million and the ideality factors averaged 10.2 +/- 0.4, both parameters taken across all the varying GO contents. The high ideality factors (>9) of the heterostructure organic/inorganic diodes are explained in terms of the low carrier mobilities of the organic interlayer. Capacitance voltage measurements indicate that the capacitance decreases with increasing frequency, suggesting a continuous distribution of interface states over the surveyed 100 kHz to 1.0 MHz frequency range. The photocurrent results indicate that the photocurrent increases with illumination intensity. The Al/p-Si/PCBM:GO/Au diode exhibits a similar photosensitivity with an illumination coefficient of approximately 1.23 +/- 0.001 over a wider range of PCBM:GO weight ratios and reverse bias. This suggests that the device photoconductivity is reasonably predictable and particularly suited for photoconductive sensing  ISSN : 1555-130X  Journal Name : JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS  Volume : 11  Issue Number : 2  Publishing Year : 1437 AH 2016 AD  Article Type : Article  Added Date : Sunday, August 13, 2017  Researchers Researcher Name (Arabic) Researcher Name (English) Researcher Type Dr Grade Email A Mekki Mekki, A Investigator Doctorate   r.o Ocaya Ocaya, r.o Researcher Doctorate   A Dere Dere, A Researcher Doctorate   A.A Al-Ghamdi, Al-Ghamdi, A.A Researcher Doctorate   K. A Harrabi Harrabi, K. A Researcher Doctorate   F Yakuphanoglu Yakuphanoglu, F Researcher Doctorate fyhan@hotmail.com Files File Name Type Description  42595.pdf pdf   Back To Researches Page