Essays about: "doping evaluation"

Found 3 essays containing the words doping evaluation.

1. 1. Reprocessing and Characterization of Polybenzimidazole for High-Temperature Polymer Electrolyte Membrane Fuel Cells

   University essay from Lunds universitet/Centrum för analys och syntes

   Author : Douglas Björkengren; [2023]
   Keywords : polymer electrolyte membrane fuel cells; PEMFC; HTPEMFC; polymer technology; polymer characterization; reprocessing; recycling; polybenzimidazole; PBI; Technology and Engineering;

   Abstract : A reprocessing method of poly(2,2’-(m-phenylene)-5,5’-bibenzimidazole) (PBI) membranes recovered from the production line of High-Temperature Polymer Electrolyte Membrane Fuel Cells (HT-PEMFC) at Blue World Technologies (BWT) has been developed in order to reduce material loss in the production. Redissolution of scrap PBI membranes in poly(phosphoric acid) (PPA) and phosphoric acid (PA) was successful and the subsequent washing procedure produced PBI that could be redissolved in N,N-dimethyl acetamide (DMAc) and suitable for solution casting of new membranes. READ MORE

3. 2. Device development for doping evaluation in nanowires using capacitance-voltage measurements

   University essay from Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

   Author : Emil Nylander; [2016]
   Keywords : Technology and Engineering;

   Abstract : This thesis aims to show the prospect of capacitance measurements over nanowire arrays as an evaluation method of the p-doping level in weakly p-doped p-n nanowires. The premise of the method is that there will be a high yield of statistical data regarding the doping level of the nanowires. READ MORE

4. 3. Evaluation of charge carrier concentration in particle assisted, Sn doped GaAs nanowires

   University essay from Halvledarmaterial; Tekniska högskolan

   Author : Mårtensson Niklas; [2013]
   Keywords : Nanowires; GaAs; Hall Effect; Resistivity; Doping; Carrier Concentration; Processing; Characterization; LED;

   Abstract : The doping concentration and resistivity of tin doped Gallium arsenide nanowires (GaAs NWs) have been investigated using Hall effect-, 4-probe-, transmission line-, and field effect measurements. Single nanowires were contacted using electron beam lithography followed by thermal evaporation of Au/Ti (900/100 Å). READ MORE