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Ahmed Emad

Bio: Ahmed Emad is an academic researcher from Nile University. The author has contributed to research in topics: Indium tin oxide & Insertion loss. The author has co-authored 3 publications.

Papers
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Journal ArticleDOI
TL;DR: In this article, a dual-loaded-on-ridge structure is proposed for fiber-to-the-home (FTTH) uplink transmission at 1330 nm wavelength.

1 citations

Proceedings ArticleDOI
01 Aug 2020
TL;DR: In this article, a study was conducted on the behavior of acceptors concentration, Shockley-Read-Hall (SRH) recombination, I-V, and P-V characteristics on a 1D Si P-N junction.
Abstract: Organic Materials have been recently used as an alternative for semiconductors in the fabrication of solar cells. The proposed organic materials as an active material are PCPDTBT(Poly[2,1,3-benzothiadiazole-4,7-diyl[4,4-bis(2ethyl-hexyl)-4H-cyclopenta[2,1-b:3,4 b']dithiophene2,6diyl]]), P3HT (Poly(3-hexylthiophene 2,5-diyl)) and PC61BM ([6,6]-Phenyl-C61-butyric acid methyl ester) because of their non-linear optical properties, easy fabrication techniques and low cost. Transparent Conducting Oxides (TCOs) are used in photovoltaics and optical devices for its low electrical resistance. In addition, TCOs do not have many losses for propagated light. The metric for the comparative study between materials is the insertion losses for a 500 nm wavelength source along with these materials. The material that has better performance should have a low insertion loss. In this paper, a study was conducted on the behavior of acceptors concentration, Shockley-Read-Hall (SRH) recombination, I-V, and P-V characteristics on a 1D Si P-N junction. The numerical solutions for insertion losses and 1D Si P-N junction are carried out by LUMERICAL and COMSOL software, respectively. At a depth of 100 nm, PC61BM has a better performance over PCPDTBT and P3HT with Insertion losses (IL) of 3.07 dB and 2.76 dB for TE and TM mode, respectively. For TCOs materials. The behavior of insertion losses on Indium Tin Oxide (ITO), Gallium doped Zinc Oxide (GZO), and Aluminum doped Zinc Oxide (AZO) is traced. At a depth of 100 nm, the insertion losses are minimized by AZO and ITO with a magnitude of 1.91 dB and 1.87 dB for TE mode, respectively, while 1.45 dB for TM mode.
Proceedings ArticleDOI
24 Oct 2020
TL;DR: A combination of P3HT: PCBM with parallel vertical LiF cylinders formulate the active material structure and the LiF is considered a suitable material for the vertical cylinders in the proposed structure.
Abstract: In this paper, we introduce active material for an organic solar cell with a modified composition. A combination of P3HT: PCBM with parallel vertical LiF cylinders formulate the active material structure. The collection efficiency in the active material reaches 92.2%. The operating wavelength where the maximum collection efficiency occurs is adjusted and matched with the wavelength where the maximum irradiance of the solar spectrum occurs. The absorption per unit volume of the new structure is 80.4 µm−3 while the blank structure is 75.07 µm−3. The net absorption magnitude for the required structure is 32.09. The LiF is considered a suitable material for the vertical cylinders in the proposed structure. At a depth of 95 nm and operating wavelength 500 nm, for TE mode, LiF has the highest insertion losses with 0.7 dB. However, ITO and ZnO possess 0.35 dB and 0.49 dB, respectively. For TM mode, LiF has the lowest insertion losses at the same depth with 0.7 dB, while ZnO possesses 0.49 dB. However, ITO performs the highest insertion losses at the same depth with 0.77 dB.

Cited by
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Journal ArticleDOI
TL;DR: In this paper , a composite of chitosan and polyvinyl alcohol (PVA) was combined effectively to create a synergetic property of both polymers, and the compatibility of NPs with the blend polymer were enhanced due to the coupling agent.

1 citations