Essays about: "Charge injection"

Showing result 1 - 5 of 19 essays containing the words Charge injection.

1. 1. Investigation of charge injection at electrode-dielectric interface relevant for HVDC cables : Simulation of charge injection and transport dynamics in electrical insulation for HVDC cables

   University essay from Uppsala universitet/Tillämpad mekanik

   Author : Mohammed Mosa; [2023]
   Keywords : BCT model; charge injection; space charge density; electric field distribution; Fowler-Nordheim; Richardson-Schottky;

   Abstract : A bipolar charge transport (BCT) model is used to simulate charge injection and transportdynamics inside insulation material which are used in a high voltage direct current (HVDC)cable. Gaining knowledge about space charge density and electric field distribution in theinsulation material enables minimising charge injection at the metal-insulator interface andavoiding unnecessary energy loss. READ MORE

3. 2. Coacervates as a subcutaneous drug delivery system

   University essay from Uppsala universitet/Institutionen för läkemedelskemi

   Author : Dania Elkhalifa; [2022]
   Keywords : ;

   Abstract : Subcutaneous administration of biological drugs has become highly attractive as it offers the possibility for patient self-administration. Coacervates as a subcutaneous drug delivery system provide a way to decrease injection volumes thereby reducing the risk of injection site pain. READ MORE

4. 3. Silicon surface passivation via ultra-thin SiO2, TiO2, and Al2O3 layers

   University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Author : Anton Ek; [2019]
   Keywords : surface passivation; ALD; silicon; solar cell; SiO2; Al2O3; TiO2; stacks; characterization; optimization; RSM; temperature;

   Abstract : Energy traps at the silicon surface originating from discontinuities in the lattice is detrimental to the performance of solar cells. Acting as recombination centers, they offer a location where the charge carriers may easily return to their original energy band after excitation. READ MORE

5. 4. Heavy-Duty Spark-Ignited Single Cylinder Engine Fueling System

   University essay from KTH/Maskinkonstruktion (Inst.)

   Author : Rohan Sharad Kittur; [2018]
   Keywords : Fueling system; heavy-duty; spark-ignited; single cylinder engine; aftermarket engine control unit; fuel-air mixture safety; bränslesystem; tunga fordon; tändstiftsantändning; encylinder motor; eftermarknadsmotorstyrenhet; bränsle-luft blandningssäkerhet;

   Abstract : Forskning inom motorutveckling bedrivs för att möta kommande emissionskrav och samtidigt minska bränsleförbrukningen. Kommande förbud mot dieseldrivna fordon planeras i flera städer runt om i världen. Alternativa bränsle som exempelvis naturgas ses som en lovande ersättning även för tunga fordon. READ MORE

6. 5. Surface energy modification of metal oxide to enhance electron injection in light-emitting devices : charge balance in hybrid OLEDs and OLETs

   University essay from Högskolan i Gävle/Avdelningen för elektronik, matematik och naturvetenskap

   Author : Sergio Apicella Fernandez; [2017]
   Keywords : organic; inorganic; semiconductors; OLEDs; OLETs; TFT; stack; thin-film; deposition; spin-coating; thermal; evaporation; process; reactive; sputtering; luminescence; EQE; PEIE; metal-oxide; ZnO; ZnO:N; MoO3; F8BT; Alq3; NPB;

   Abstract : Organic semiconductors (OSCs) present an electron mobility lower by several orders of magnitude than the hole mobility, giving rise to an electron-hole charge imbalance in organic devices such as organic light-emitting diodes (OLEDs) and organic light-emitting transistors (OLETs). In this thesis project, I tried to achieve an efficient electron transport and injection properties in opto-electronic devices, using inorganic n-type metal oxides (MOs) instead of organic n-type materials and a polyethyleneimine ethoxylated (PEIE) thin layer as electron transport (ETLs) and injection layers (EILs), respectively. READ MORE