Advanced search

Showing result 1 - 5 of 17 essays matching the above criteria.

1. 1. Investigating self-discharge in a graphite dual-ion cell using in-situ Raman spectroscopy.

   University essay from Uppsala universitet/Strukturkemi

   Author : Ismail Yussuf Hassan; [2023]
   Keywords : graphite; dual-ion battery; parasitic reaction; cathode-electrolyte interface; anion intercalation; concentrated electrolyte; self-discharge; Raman spectroscopy;

   Abstract : Anion intercalation in the graphite positive electrode of a dual-ion battery requires high potential (> 4.3 V vs Li+/Li), which aggravates parasitic reactions involving electrolyte decomposition and Al corrosion, manifesting in poor coulombic efficiency, cycle life, and quick self-discharge. READ MORE

3. 2. Properties of III-V/Si heterojunction fabricated by HVPE

   University essay from KTH/Tillämpad fysik

   Author : Prakhar Bhargava; [2020]
   Keywords : ;

   Abstract : Silicon is a promising material and is used for a wide range of applications in the electronics industry because of the high quality surface passivation given by the native oxide layer SiO2e. However, Si is not an ideal candidate for optoelectronic applications due to its indirect bandgap of 1. READ MORE

4. 3. Influence of microstructure on surface characteristics in cold-deformed stainless steel tubes

   University essay from Lunds universitet/Materialteknik

   Author : Fredrik Ottenklev; [2019]
   Keywords : Cold deformation; surface roughness; strain; microstructure; austenitic stainless steel; grain rotation; Technology and Engineering;

   Abstract : Cold deformation of metals is known to induce roughness on their free surface. In some of the processing equipment of Tetra Pak processing systems, tubes of austenitic stainless steel 316L are used. During the production of this processing equipment, such tubes are occasionally cold-deformed. READ MORE

5. 4. 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

6. 5. Processing of Sub-micrometer Features for Rear Contact Passivation Layer of Ultrathin Film Solar Cells Using Optical Lithography

   University essay from

   Author : Evelina Roxner; Ronja Olsmats Baumeister; [2019]
   Keywords : nanofabrication; optical lithography; photo lithography; line contacts; microfabrication; rear contact passivation; passivation layer; sub-micrometer features; thin film; ultra-thin film; solar cells; CIGS; aluminiumoxide;

   Abstract : Thin film copper, indium, gallium, selenide (CIGS) solar cells are promising in the field of photovoltaic technology. To reduce material and fabrication cost, as well as increasing electrical properties of the cell, research is ongoing towards ultra-thin film solar cells (absorption layer thickness less than 500 nm). READ MORE