Browsing by Author "López Rodríguez, Gema"
Now showing items 1-20 of 50
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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. ... -
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 ... -
Germanium photovoltaic cells with MoO x hole-selective contacts
(2019-03-15)
Article
Open AccessVery thin, thermally evaporated MoOx (x¿<¿3) layer has been used as transparent hole-selective contact on an n-type Germanium substrate to effectively demonstrate PV conversion capability. The fabricated MoOx/Ge heterojunction ...
