Essays about: "energy defect"

Showing result 11 - 15 of 29 essays containing the words energy defect.

  1. 11. Evaluation tool for solving local power and capacity deficit

    University essay from KTH/Energiteknik

    Author : Lovisa Nycander; [2020]
    Keywords : Capacity defect; power deficit; power grid; future electricity grid; battery; PV grid reinforcement; technical characteristics; investment cost; Kapacitetsbrist; effektbrist; elnät; framtida elnät; batteri; PV; förstärkning av elnät; tekniska parametrar; investeringskostnader;

    Abstract : Sweden has a goal of becoming carbon neutral by 2045. To reach this goal electrification of different sectors are one of the most important pathways for becoming fossil free. The power grid in Sweden has historically been seen as stable and with unlimited transmission capacity. READ MORE

  3. 12. A comparative study of ZnO i-layer deposited with ALD and PVD for CIGS solar cells

    University essay from Uppsala universitet/Fasta tillståndets elektronik

    Author : Joel Johansson Byberg; [2019]
    Keywords : CIGS; ZnO; ZnMgO; solar cells; thin film; zinc oxide; window layer; ALD; PVD;

    Abstract : Two identified setbacks for CIGS based devices in order to obtain higher efficiency are parasitic absorption in the window layer structure and losses in open-circuit voltage due to bad interfaces. This study investigated how the performance of the solar cell is affected by depositing intrinsic ZnO (i-ZnO) and ZnMgO with atomic layer deposition (ALD) instead of the conventional sputtering. READ MORE

  4. 13. 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. 14. Aerial Thermography Inspections in Large-Scale PV Plants

    University essay from Högskolan Dalarna/Energiteknik

    Author : Salvador Selva Marti; [2018]
    Keywords : Infrared thermography inspection; large-scale PV plants; drone; unmanned aerial vehicles; Quintas Energy; operation and maintenance; monitoring operations;

    Abstract : In order to successfully compete against the use of fossil fuels to generate electricity, one of the challenges in the photovoltaic (PV) business currently in focus is on the asset management of large PV plants, in which developing control techniques to prognosticate and evaluate the future energy performance will be essential. Infrared thermography inspections can give meaningful support to assess the quality and performance of PV modules. READ MORE

  6. 15. Characterization of combinatorial Cu2ZnSnS4 thin films

    University essay from Uppsala universitet/Fasta tillståndets elektronik

    Author : Joakim Adolfsson; [2018]
    Keywords : Photovoltaics; Kesterite; Material science; Raman; Photoluminescence;

    Abstract : The kesterite Cu2ZnSnS4 (CZTS) is considered as a possible absorber layer in future photovoltaic (PV) applications. The abundance of its constituent elements along with the material being non-toxic and having a direct band gap of around 1.5 eV make it an attractive material for solar cell applications. So far, cells with an efficiency of 12. READ MORE