Ara es mostren els items 1-18 de 18

    • Design and implementation of an organic semi-transparent photovoltaic device 

      Puig Ribas, Jordi (Universitat Politècnica de Catalunya, 2016-06)
      Treball Final de Grau
      Accés obert
      Organic polymeric solar cells require thin absorber layers due to intrinsic low exciton diffusion distances, thus showing low absorption of light. They are also characterized by having a low absorption peak, whose position ...
    • Double resonant character in an optical cavity for high performance and stable polymer solar cells 

      Liu, Quan (Universitat Politècnica de Catalunya, 2018-03-23)
      Tesi
      Accés obert
      Realitzat a/amb:   Karlsruher Institut für Technologie
      Solution-processed thin film solar cells emerged as very promising photovoltaic technologies suitable for a low cost roll-to-roll upscale production. Such thin film character also ensures lightweight and flexibility for ...
    • Fluorescence quantum yield and the open circuit voltage in perovskite solar cells 

      Kramarenko, Mariia (Universitat Politècnica de Catalunya, 2023-03-24)
      Tesi
      Accés obert
      (English) To mitigate the energy and climate crisis we are already facing and address the increasing energy consumption, it is essential to foster energy transition strategies. The energy transition success largely depends ...
    • Fluorescence quantum yield role on the Perovskite solar cell efficiency 

      Kramarenko, Mariia (Universitat Politècnica de Catalunya, 2016-09-09)
      Projecte Final de Màster Oficial
      Accés restringit per acord de confidencialitat
    • Frequency doubling in SBN crystal affected by poling and thermal treatment 

      Yao, Can (Universitat Politècnica de Catalunya, 2009-09-09)
      Projecte Final de Màster Oficial
      Accés obert
      The random anti-parallel micro-ferroelectric domains in SBN (Strontium-Barium Niobate, Sr0.61Ba0.39Nb2O3, ) crystal can be used for efficient nonlinear optical processes at different frequencies. The ferroelectric domains ...
    • Influence of SnO2 layer and thickness of BiVO4 photoanodes for photoelectrochemical water splitting 

      Gerónimo Gómez, Laura (Universitat Politècnica de Catalunya, 2022-09-06)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   Institut de Ciències Fotòniques (ICFO)
      Bismuth vanadate has attracted much attention as one of the most promising materials for photoelectrochemical (PEC) water splitting. This Master Thesis is aimed at understanding BiVO4 films growth to use it as photoanodes. ...
    • Interacció Paramètrica no Lineal en Materials amb Nano-Estructuració Ordenada 

      Maymó Camós, Marc (Universitat Politècnica de Catalunya, 2007-11-29)
      Tesi
      Accés obert
      Les interaccions no lineals de segon ordre són, probablement, uns dels processos de l'òptica no lineal més utilitzats i rellevants en quant a les seves aplicacions. Aquestes interaccions només són eficients en materials ...
    • Light absorption and ergodicity in systems that transform light into other forms of energy 

      Ferreira, Catarina Gonçalves (Universitat Politècnica de Catalunya, 2023-09-27)
      Tesi
      Accés obert
      (English) To mitigate the present environmental crisis, caused by the excessive use of fossil fuels and associated release of carbon dioxide into the atmosphere, it is necessary to significantly reduce worldwide energy ...
    • Light enhancements in nano-structured solar cells 

      Pastorelli, Francesco (Universitat Politècnica de Catalunya, 2013-12-09)
      Tesi
      Accés obert
      In this century some of our main issues are energy shortage and pollution. This work will briefly describe these problems, proposing a plan of action combining energy saving and different sustainable energy sources. Within ...
    • Light generation and manipulation from nonlinear randomly distributed domains in SBN 

      Yao, Can (Universitat Politècnica de Catalunya, 2014-06-25)
      Tesi
      Accés obert
      Disordered media with refractive index variations can be found in the atmosphere, the ocean, and in many materials or biological tissues. Several technologies that make use of such random media, as image formation, satellite ...
    • Light harvesting and energy efficiency in perovskite solar cells and their applications 

      Martínez-Denegrí Sánchez, Guillermo (Universitat Politècnica de Catalunya, 2021-09-29)
      Tesi
      Accés obert
      The environmental issues associated with the use of conventional fuels necessitates the utilisation of renewable energy sources, as well as the implementation of energy efficient designs, in order to decrease electricity ...
    • Light harvesting in fiber array organic solar cells 

      Mariano Juste, Marina (Universitat Politècnica de Catalunya, 2014-10-31)
      Tesi
      Accés obert
      Considering that the most abundant renewable energy source is the Sun, photovoltaic technology possesses one of the highest potentials to provide environmental benign and sustainable energy worldwide. Currently, most of ...
    • Multi-junction thin film solar cells for an optimal light harvesting 

      Mantilla Pérez, Paola (Universitat Politècnica de Catalunya, 2017-04-24)
      Tesi
      Accés obert
      Thin film photovoltaics encompass a group of technologies able to harvest light within a few microns thickness. The reduced thickness allows a low cost of manufacture while making the films flexible and adaptable to ...
    • Nonlinear optical properties of organo-metallic films 

      Mariano Juste, Marina (Universitat Politècnica de Catalunya, 2009-07-09)
      Projecte Final de Màster Oficial
      Accés obert
      Joining organic molecules and metallic nanoparticles into coupled heterostruc- tures allows tuning their optical properties and o®ers novel possibilities for manipulating their emission patterns. This Master Thesis is ...
    • Photon control in nano-structured organic photovoltaic materials 

      Betancur Lopera, Rafael (Universitat Politècnica de Catalunya, 2013-07-10)
      Tesi
      Accés obert
      Organic photovoltaic (OPV) technology has emerged as a potential cost-effective solution to produce electrical energy. The foreseen low manufacturing costs combined with features as semi-transparency or mechanical flexibility ...
    • Second Harmonic Generation in Photonic Crystals 

      Trull Silvestre, José Francisco (Universitat Politècnica de Catalunya, 1999-12-21)
      Tesi
      Accés obert
      Photonic crystals emerged at the end of the last decade as a new frame to control the interaction between radiation and matter. The potential advances that such structures could report in photonics technology has lead to ...
    • Ultrafast singlet fission dynamics in polymer-based thin-films measured by femtosecond transient absorption spectroscopy 

      Caravaca Crespo, Eva (Universitat Politècnica de Catalunya, 2022-08-26)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   Institut de Ciències Fotòniques (ICFO) / Universitat de Barcelona / Universitat Autònoma de Barcelona
      Singlet fission is a photophysical process which converts an excited singlet state into two independent triplet states. This has attracted significant attention for photovoltaic devices due to the fact that more than one ...
    • Whispering gallery microresonator for second harmonic light generation 

      Domínguez Juárez, Jorge Luís (Universitat Politècnica de Catalunya, 2014-07-22)
      Tesi
      Accés obert
      In recent years, it has been proposed that circular microresonators may become an important element in the core of many photonic devices. The high Q-factors seen in fused silica micro-spheres and micro-toroids for light ...