Browsing by Author "Puigdollers i González, Joaquim"
Now showing items 1-20 of 151
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A compact tetrathiafulvalene-benzothiadiazole dyad and its highly symmetrical charge-transfer salt: Ordered donor p-stacks closely bound to their acceptors
(2014-06-02)
Article
Restricted access - publisher's policyA compact and planar donor-acceptor molecule 1 comprising tetrathiafulvalene (TTF) and benzothiadiazole (BTD) units has been synthesised and experimentally characterised by structural, optical, and electrochemical methods. ... -
A critical analysis on the role of back surface passivation for a-Si/c-Si heterojunction solar cells
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Conference lecture
Restricted access - publisher's policyBack surface passivation is a well-known method to reduce carrier recombination and hence improves the efficiency of crystalline silicon solar cells. In this manuscript, we critically analyze the role of this process for ... -
A rapid, low-cost, and scalable technique for printing state-of-the-art organic field-effcet transistors
(2016-06-13)
Article
Open AccessIn the last few years exciting advances have been achieved in developing printing techniques for organic semiconductors, and impressive mobility values have been reported for the resulting organic field-effect transistors ... -
A self-branched lamination of hierarchical patronite nanoarchitectures on carbon fiber cloth as novel electrode for ionic liquid electrolyte-based high energy density supercapacitors
(2019-11-14)
Article
Open AccessThe developments of rationally designed binder-free metal chalcogenides decorated flexible electrodes are of paramount importance for advanced energy storage devices. Herein, binder-free patronite (VS4) flower-like ... -
Air stable organic semiconductors based on diindolo[3,2-a:3',2'-c]carbazole
(2018-11-01)
Article
Open AccessThe extension of the p-conjugated 10,15-dihydro-5H-diindolo[3,2-a:3',2'-c]carbazole (triindole) system via the introduction of donor moieties of different nature (phenyl, naphthyl, methylthiophenyl and benzo[b]thienyl) at ... -
Analysis of bias stress on thin-film transistors obtained by Hot-Wire Chemical Vapour Deposition
(2001-02)
Article
Open AccessThe stability under gate bias stress of unpassivated thin film transistors was studied by measuring the transfer and output characteristics at different temperatures. The active layer of these devices consisted of in ... -
Analysis of GaAs-Ti thin films deposited by sputtering onto c-Si and GaAs
(IEEE Press. Institute of Electrical and Electronics Engineers, 2009-02-11)
Conference lecture
Open AccessSome sputtering processes of GaAs and Ti onto glass, c-Si and c-GaAs substrates have been carried out in order to obtain thin films as candidates to be intermediate band photovoltaic materials. This work presents first ... -
Analysis of temperature dependent current-voltage and capacitance-voltage characteristics of an Au/V2O5/ n -Si Schottky diode
(2017-08-01)
Article
Open AccessElectronic properties of Au/V2O5/n-Si Schottky device have been investigated by temperature dependent current-voltage (I-V) and capacitance-voltage (C-V) measurements ranging from 300 K to 150 K. Ideality factor (n) and ... -
Analysis of the dynamic short-circuit resistance in organic bulk-heterojunction solar cells: relation to the charge carrier collection efficiency
(2013-06)
Article
Restricted access - publisher's policyThis work studies the charge carrier collection efficiency in organic bulk-heterojunction solar cells based on polymer:fullerene blends. An equivalent circuit with a specific recombination term is proposed to describe the ... -
Atomic layer deposition of vanadium oxide films for crystalline silicon solar cells
(Royal Society of Chemistry (RSC), 2022)
Article
Open AccessTransition metal oxides (TMOs) are promising materials to develop selective contacts on high-efficiency crystalline silicon solar cells. Nevertheless, the standard deposition technique used for TMOs is thermal evaporation, ... -
Back junction n-type silicon heterojunction solar cells with V2O5 hole-selective contact
(Elsevier, 2016)
Conference lecture
Open Access -
Bifacial heterojunction silicon solar cells by Hot-Wire CVD with open circuit voltage exceeding 600 mV
(2006-07)
Article
Restricted access - publisher's policyDouble-sided (bifacial) heterojunction silicon solar cells have been fabricated by Hot-Wire CVD on both p- and n-type crystalline silicon substrates. In these devices, doped microcrystalline silicon layers are combined ... -
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 ... -
Challenges and improvement pathways to develop quasi-1D (Sb1-xBix)2Se3-based materials for optically tuneable photovoltaic applications. Towards chalcogenide narrow-bandgap devices
(2023-03-01)
Article
Open AccessQuasi-1D chalcogenides have shown great promises in the development of emerging photovoltaic technologies. However, most quasi-1D semiconductors other than Sb2Se3 and Sb2S3 have been seldom investigated for energy generation ... -
Characterization and application of a-SiCx:H films for the passivation of the c-Si surface
(2002-01)
Article
Restricted access - publisher's policyIn this work we investigate the effects of typical thermal treatments on c-Si surface passivation by intrinsic a-SiCx:H films. First, a forming gas anneal (FGA), (400 °C, 30 min in H2/N2) is applied resulting in an improvement ... -
Characterization and modeling of organic thin-film transistors based pi-conjugated small molecule tetraphenyldibenzoperiflanthene: effects of channel length
(2016-07-01)
Article
Open AccessP-type organic thin film transistors (OTFTs) with different channel lengths have been fabricated and characterized by thermal evaporation using the small tetraphenyldibenzoperiflanthene (DBP) as an active material on Si/SiO2 ... -
Characterization of bifacial heterojunction Silicon solar cells obtained by Hot-Wire CVD
(2006-07)
Article
Restricted access - publisher's policyIn this work, we study bifacial heterojunction silicon solar cells fabricated by hot-wire CVD on both p- and n-type crystalline silicon substrates. In these devices, hydrogenated microcrystalline silicon doped layers are ... -
Characterization of transition metal Oxide/Silicon heterojunctions for solar cell applications
(2015-10-09)
Article
Open AccessDuring the last decade, transition metal oxides have been actively investigated as hole- and electron-selective materials in organic electronics due to their low-cost processing. In this study, four transition metal oxides ... -
Comparison between the density-of-states of picene transistors measured in air and under vacuum
(2012-01)
Article
Restricted access - publisher's policyPicene has recently attracted much attention as the active layer in organic thin-film transistors because of its good performance in air. In this work, we have fabricated picene thin-film transistors that exhibit field-effect ... -
Comparison of simulation models for Perovskite solar cells
(WIP Renewable Energies, 2016)
Conference report
Restricted access - publisher's policyIn this work, a comparison of two models for the simulation of the electrical behavior of perovskite solar cells is presented. The two models considered are the well-known one diode model and an analytical model recently ...
