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Sökning: WFRF:(Ganjian M.)

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1.
  • Ebrahimi, P., et al. (författare)
  • Systematic Optimization of Boron Diffusion for Solar Cell Emitters
  • 2017
  • Ingår i: Journal of Electronic Materials. - : Springer. - 0361-5235 .- 1543-186X. ; 46:7, s. 4236-4241
  • Tidskriftsartikel (refereegranskat)abstract
    • To achieve p-n junctions for n-type solar cells, we have studied BBr3 diffusion in an open tube furnace, varying parameters of the BBr3 diffusion process such as temperature, gas flows, and duration of individual process steps, i.e., predeposition and drive-in. Then, output parameters such as carrier lifetime, sheet resistance, and diffusion profile were measured and statistically analyzed to optimize the emitter characteristics. Statistical analysis (factorial design) was finally employed to systematically explore the effects of the set of input variables on the outputs. The effect of the interactions between inputs was also evaluated for each output, quantified using a two-level factorial method. Temperature and BBr3 flow were found to have the most significant effect on different outputs such as carrier lifetime, junction depth, sheet resistance, and final surface concentration.
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2.
  • Norouzi, M., et al. (författare)
  • Thermoelectric energy harvesting using array of vertically aligned Al-doped ZnO nanorods
  • 2016
  • Ingår i: Thin Solid Films. - : Elsevier. - 0040-6090 .- 1879-2731. ; 619, s. 41-47
  • Tidskriftsartikel (refereegranskat)abstract
    • Renewable energy harvesting is an innovative research area which has attracted a great deal of efforts to find a substitute for fossil sources. This work presents processing and characterization of thermoelectric device (one leg of the nanogenerator) made of aluminum-doped zinc oxide (ZnO) nanorods on the glass substrate. The effect of aluminum-doping on the Seebeck coefficient as an important figure-of-merit for thermoelectric performance has been extensively studied. The electrical characterization was performed to examine the quality of the nanorods' contacts. For 1% Al-doped ZnO nanorods on the silicon substrate, open circuit voltage of 0.28 mV and S.C. current of 3.5 mu A were obtained. In these measurements, a constant temperature difference of 1 K between the top and bottom side of the nanorods was implemented. The Seebeck coefficient was found to be increased proportionally with the doping concentration.
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  • Resultat 1-2 av 2
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tidskriftsartikel (2)
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refereegranskat (2)
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Kolahdouz, M. (2)
Ebrahimi, P (2)
Ganjian, M. (2)
Radamson, Henry H. (1)
Radamson, Henry (1)
Iraj, M. (1)
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Aghababa, H. (1)
Asl-Soleimani, E. (1)
Norouzi, M (1)
Soleimanzadeh, R. (1)
Narimani, K. (1)
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Kungliga Tekniska Högskolan (2)
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