Browsing by Author "Saucedo Silva, Edgardo Ademar"
Now showing items 1-20 of 32
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A new approach for alkali incorporation in Cu2ZnSnS4 solar cells
(2022-10-01)
Article
Open AccessThe addition of alkali elements has become mandatory for boosting solar cell performance in chalcogenide thin films based on kesterites (Cu2ZnSnS4, CZTS). A novel doping process is presented here, that consists in 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, ... -
Bromine etching of kesterite thin films: perspectives in depth defect profiling and device performance improvement
(Institute of Electrical and Electronics Engineers (IEEE), 2021)
Conference report
Restricted access - publisher's policyUsing a controlled bromine etching on kesterite absorbers, two major results are obtained. We establish the first defect depth profiling and secondary phases depth profiling of a state of the art Cu2ZnSnSe4 (CZTSe) film ... -
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 ... -
Combinatorial and machine learning approaches for the analysis of Cu2ZnGeSe4: influence of the off-stoichiometry on defect formation and solar cell performance
(Royal Society of Chemistry (RSC), 2021-04-28)
Article
Open AccessSolar cells based on quaternary kesterite compounds like Cu2ZnGeSe4 are complex systems where the variation of one parameter can result in changes in the whole system, and, as consequence, in the global performance of the ... -
Defect depth-profiling in kesterite absorber by means of chemical etching and surface analysis
(2021-02-28)
Article
Open AccessA method to probe the depth morphology, defect profile and possible secondary phases in a thin film semiconductor is presented, taking a standard Kesterite film as an example. Using a top-down approach based on a previously ... -
Does Sb2Se3 admit nonstoichiometric conditions? How modifying the overall se content affects the structural, optical, and optoelectronic properties of Sb2Se3 thin films
(2022-03-09)
Article
Open AccessSb2Se3 is a quasi-one-dimensional (1D) semiconductor, which has shown great promise in photovoltaics. However, its performance is currently limited by a high Voc deficit. Therefore, it is necessary to explore new strategies ... -
Effect of post annealing thermal heating on Cu2ZnSnS4 solar cells processed by sputtering technique
(2022-05-01)
Article
Open AccessIn this work, a detailed study of the effect of thermal treatment (hot plate) on a Mo/CZTS/CdS/i-ZnO/ITO solar cell was carried out, which promotes the diffusion of the Cd contained in the window layer of CdS towards the ... -
Expanding the perspective of polymeric selective contacts in photovoltaic devices using branched polyethylenimine
(American Chemical Society (ACS), 2022-09-05)
Article
Open AccessThis work studies the use of polymeric layers of polyethylenimine (PEI) as an interface modification of electron-selective contacts. A clearly enhanced electrical transport with lower contact resistance and significant ... -
Feasibility of a full chalcopyrite tandem solar cell: a quantitative numerical approach
(Wiley, 2021-07-08)
Article
Open AccessThe potential of tandem solar cells combining two chalcopyrite absorbers is evaluated using numerical modeling based on an exhaustive set of experimental parameters, offering a high degree of confidence in the numerical ... -
High efficiency Cu2ZnSnS4 solar cells over FTO substrates and their CZTS/CdS interface passivation via thermal evaporation of Al2O3
(Royal Society of Chemistry (RSC), 2021-04-28)
Article
Open AccessThe fabrication of soda lime glass/fluorine-doped tin oxide (SLG/FTO) transparent substrates represents an important advance in the fabrication of tandem solar cells. In addition, possible passivation using Al2O3, which ... -
Hole Transport Layer based on atomic layer deposited V2Ox films: paving the road to semi-transparent CZTSe solar cells
(2021-09-15)
Article
Restricted access - publisher's policyThis work explores the use of very thin transparent vanadium oxide films deposited by atomic layer deposition (ALD) technique as hole transport layer for CZTSe solar cells as alternative of opaque molybdenum based contacts. ... -
Influence of amorphous silicon carbide intermediate layer in the back-contact structure of Cu2ZnSnSe4 solar cells
(2016-08-01)
Article
Open AccessCu2 ZnSn(S1-ySey )4 (CZTS) thin-film solar cells have been qualified as potential competitors of the more established CIGS ones. One of the more important handicaps of CZTS solar cells is the open-circuit voltage deficit. ... -
Insights into interface and bulk defects in a high efficiency kesterite-based device
(2021-01-01)
Article
Open AccessThis work provides a detailed analysis of a high efficiency Cu2ZnSnSe4 device using a combination of advanced electron microscopy and spectroscopy techniques. In particular, a full picture of the different defects present ... -
Insights on the limiting factors of Cu2ZnGeSe4 based solar cells
(2021-08-01)
Article
Restricted access - publisher's policyGermanium-based wide band gap kesterite semiconductor Cu2ZnGe(S,Se)4 (CZGeSSe) is considered a very promising absorber compound as top cell in tandem devices. Autonomy to tailor the band gap from ~1.47 eV (Cu2ZnGeSe4-CZGeSe) ... -
Insights on the thermal stability of the Sb2Se3 quasi-1D photovoltaic technology
(Wiley, 2021-10-13)
Article
Open AccessThis work explores the thermal stability of antimony-based photovoltaic (PV) technologies investigating the effect of low-temperature (50—350¿°C) postdeposition annealings (PDAs) on bare Sb2Se3 absorbers and complete ... -
Interdigitated back-contacted crystalline silicon solar cells fully manufactured with atomic layer deposited selective contacts
(2022-04-02)
Article
Open AccessThe interdigitated back-contacted (IBC) solar cell concept has been extensively studied for single-junction cells and more recently as a good choice for three-terminal tandem devices. In this work, carrier-selective contacts ... -
Investigation on limiting factors affecting Cu2ZnGeSe4 efficiency: Effect of annealing conditions and surface treatment
(2020-10-01)
Article
Open AccessThis work aims to unveil the optimal annealing conditions and surface treatments of CZGeSe absorbers, synthesized using vacuum-based deposition technique, with an eye to optimizing the main parameters allowing better control ... -
Kinetics and phase analysis of kesterite compounds: Influence of chalcogen availability in the reaction pathway
(2022-08-01)
Article
Restricted access - publisher's policyPhysical vapor deposition methodologies have gained a lot of interest in the synthesis of kesterites, including sequential processes based on sputtering of metals followed by reactive annealing. Bearing this in mind, ... -
Life cycle assessment of different chalcogenide thin-film solar cells
(2022-05-01)
Article
Open AccessThin-film photovoltaics (PV) cells offer several benefits over conventional first-generation PV technologies, including lighter weight, flexibility, and lower power generation cost. Among the competing thin-film technologies, ...
