Browsing by Author "López Rodríguez, Gema"
Now showing items 1-20 of 51
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A CubeSAT payload for in-situ monitoring of pentacene degradation due to atomic oxygen etching in LEO
(2016-09-01)
Article
Open AccessThis paper reports and discusses the design and ground tests of a CubeSat payload which allows to measure, in-situ and in real time, the degradation of a polymer of electronic interest due to atomic oxygen etching in LEO. ... -
A miniaturized two axis sun sensor for attitude control of nano-satellites
(2010-10-10)
Article
Open AccessThis paper describes the design, fabrication, characterization, and satellite integration of a miniaturized two axis sun sensor which has been used in the attitude control system of the Spanish nano-satellite NANOSAT-1B. ... -
Accelerating hydrogen sensing with Pd-Mos capacitors using active controls of trapped charge
(Elsevier, 2024-11)
Article
Open AccessHydrogen monitoring with reliable, fast and cheap sensors is crucial to fully exploit the potential of this gas as an energy vector. One of the most appealing technologies for hydrogen sensing is based on MOS capacitors ... -
An IBC solar cell for the UPC CubeSat-1 mission
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Conference report
Restricted access - publisher's policyIn this work the fabrication and electrical characterization of interdigitated back contact IBC solar cells is shown. These solar cells have been specifically designed for a CubeSat based satellite under developement at ... -
Application of quasi-steady-state photoconductance technique to lifetime measurements on crystalline germanium substrates
(2020-07-01)
Article
Open AccessSimilar to other high quality crystalline absorbers, an accurate knowledge of surface passivation of crystalline germanium (c-Ge) substrates is crucial for a straightforward improvement of photovoltaic device performance. ... -
Base contacts and selective emitters processed by laser doping technique for p-type IBC c-Si solar cells
(2015-08-28)
Article
Open AccessAbstract In this work, we describe a novel fabrication process of p-type interdigitated back contact (IBC) silicon solar developed by means of laser doping and laser firing techniques. We use dielectric layers both as ... -
Black ultra-thin crystalline silicon wafers reach the 4n2 absorption limit–application to IBC solar cells
(2023-09-27)
Article
Open AccessCutting costs by progressively decreasing substrate thickness is a common theme in the crystalline silicon photovoltaic industry for the last decades, since drastically thinner wafers would significantly reduce the ... -
Boron diffused emitters passivated with Al2O3 films
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Conference report
Restricted access - publisher's policyIn this work we study the fabrication and characterization of boron diffused emitters using FZ c-Si(n) substrates. Emitter surface was passivated with Al2O3(25 nm thick) layers deposited by thermal atomic layer deposition ... -
c-Si solar cells based on laser-processed dielectric films
(2014-09)
Article
Restricted access - publisher's policyThis paper shows an innovative and low temperature fabrication technology for crystalline silicon (c-Si) solar cells where the highly-doped regions are punctually defined through laser processed dielectric films. ... -
Células fotovoltaicas con un rendimiento del 20.5%
(Grupo Acorde Comunicación (GAC), 2011-03-01)
Article
Restricted access - publisher's policyUn grupo de investigadores de la Universitat Politècnica de Catalunya (UPC) han desarrollado un proceso de fabricación que permite obtener rendimientos de conversión fotovoltaicos del 20,5%. Esto supone una mejora sustancial ... -
Charge trapping control in MOS capacitors
(Institute of Electrical and Electronics Engineers (IEEE), 2016-12-26)
Article
Open AccessThis paper presents an active control of C-V characteristic for MOS capacitors based on Sliding Mode control and sigma-delta-modulation. The capacitance of the device at a certain voltage is measured periodically and ... -
“Cold” process for IBC c-Si solar cells fabrication
(Elsevier, 2016)
Conference lecture
Open Access -
Crystalline silicon solar cells beyond 20% efficiency
(IEEE Press. Institute of Electrical and Electronics Engineers, 2011)
Conference report
Open Access—This paper describes a fabrication process to obtain high efficiency c-Si cells (> 20%) based on the Laser Fired Contact Passivated Emitter Rear Cell (LFC-PERC) concept. Photovoltaic efficiencies beyond 20% have ... -
DopLa solar cells with texturized front surface
(Elsevier, 2016)
Conference report
Open AccessIn this work, we report on improving efficiency of DopLa cells fabricated on p-type substrates. This type of solar cells has all the highly-doped regions based on laser doping from dielectric films resulting in a very ... -
Effect of the thickness of amorphous silicon carbide interlayer on the passivation of c-Ge surface by aluminium oxide films
(Elsevier, 2022-07)
Article
Open AccessSurface passivation is of paramount importance in photovoltaic devices based on high-quality crystalline absorbers such as crystalline germanium (c-Ge). In this work, we report on the surface passivation of p-type c-Ge by ... -
Electron selective contacts based on Al2O3/TiO2/ZnO stacks for crystalline silicon solar cells
(2018)
Conference lecture
Restricted access - publisher's policyIn the last years, our research group has focused on the development of Interdigitated Back Contacted (IBC) solar cells based on transition metal oxides. In particular, a very thin Al2O3/TiO2 stack deposited by ALD has ... -
Emitter formation using laser doping technique on n- and p-type c-Si substrates
(2015-05-01)
Article
Open AccessIn this work laser doping technique is used to create highly-doped regions defined in a point-like structure to form n+/p and p+/n junctions applying a pulsed Nd-YAG 1064 nm laser in the n ... -
Epitaxially grown crystalline silicon as electron selective contact layer for crystalline germanium TPV cells
(2023)
Conference lecture
Restricted access - publisher's policyCrystalline germanium has been proposed as a cost-effective absorber for the fabrication of thermophotovoltaic (TPV) cells which require, among other technologies, the development of electron-selective contacts. In this ... -
Exercicis Expressió Gràfica GETI ETSEIB 2023 24
(Universitat Politècnica de Catalunya, 2024)
Problem statement, exercise
Open Access -
Fully low temperature interdigitated back-contacted c-Si(n) solar cells based on laser-doping from dielectric stacks
(2017-09-01)
Article
Open AccessThis work shows a novel fabrication process of interdigitated back-contacted c-Si(n) solar cells based on laser-doped point contacts. In this approach, all the highly-doped regions have been entirely fabricated through UV ...
