Gianluca Timò
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View article: Step-Graded III–V Metamorphic Buffers on Ge for High-Efficiency Photovoltaics: Investigation of Strain Relaxation and Morphology Evolution
Step-Graded III–V Metamorphic Buffers on Ge for High-Efficiency Photovoltaics: Investigation of Strain Relaxation and Morphology Evolution Open
This work is motivated by the need to enhance efficiency and radiation resistance and reduce weight in high-performance photovoltaic devices, with applications spanning both terrestrial and space environments. Metamorphic buffers are key e…
View article: All MOVPE Grown Quadruple Junction InGaP/InGaAs/Ge/Ge Solar Cell
All MOVPE Grown Quadruple Junction InGaP/InGaAs/Ge/Ge Solar Cell Open
Most commercially available InGaP/InGaAs/Ge triple-junction solar cells suffer from current mismatch due to the excess current generated by the Ge sub-cell. Combining epitaxial germanium with III–V materials would enable the realization of…
View article: Experimental platform for PV generator characterization and MPPT algorithm simulation in vehicle integrated photovoltaic applications under real operating conditions
Experimental platform for PV generator characterization and MPPT algorithm simulation in vehicle integrated photovoltaic applications under real operating conditions Open
View article: Analysis and optimization of a Time Resolved Photoluminescence instrument
Analysis and optimization of a Time Resolved Photoluminescence instrument Open
This work describes the analysis and optimization of a Time Resolved Photoluminescence instrument to improve its optical performances. Simulation of the light behaviour inside the sample material have been done to maximize light extraction…
View article: Online monitoring of the spectral characteristic of a flashed solar simulator for performance assessment of multijunction solar cells
Online monitoring of the spectral characteristic of a flashed solar simulator for performance assessment of multijunction solar cells Open
This work presents the implementation of high-speed spectral measurements for online monitoring of the spectral characteristics of a flasher solar simulator necessary to apply the mismatch spectral correction between the standard ASTM G173…
View article: Development of an electronic interface for diagnostics of photovoltaic strings
Development of an electronic interface for diagnostics of photovoltaic strings Open
Photovoltaic (PV) systems can generate less energy than expected owing to inefficiency of the inverter, deterioration of the PV modules or conditions of partial shading and soiling. The monitoring and diagnosis techniques of PV systems are…
View article: Capabilities of Grazing Incidence X-ray Diffraction in the Investigation of Amorphous Mixed Oxides with Variable Composition
Capabilities of Grazing Incidence X-ray Diffraction in the Investigation of Amorphous Mixed Oxides with Variable Composition Open
X-ray Diffraction has been fully exploited as a probe to investigate crystalline materials. However, very little research has been carried out to unveil its potentialities towards amorphous materials. In this work, we demonstrated the capa…
View article: A new CPV/PV hybrid module with a self-powered, integrated, 3D meso solar tracker based on shape memory alloys
A new CPV/PV hybrid module with a self-powered, integrated, 3D meso solar tracker based on shape memory alloys Open
A new CPV/PV hybrid module (PVSMART2), with a self-powered, integrated 3D meso solar tracking system based on shape memory alloy actuators (SMA), is proposed. The use of SMAs allows simplifying the solar tracker technology, drastically red…
View article: CPV standardization 2021 – Maintenance and stability
CPV standardization 2021 – Maintenance and stability Open
The rapid and substantial decline of the cell-cost, CPV, relied on cell-saving and became less valuable. Many players and systems got off the stage as a result. Also, less and fewer new proposals in the CPV standardization. We decided to c…
View article: Design of a novel compact prismatic concentrator with improved angular acceptance
Design of a novel compact prismatic concentrator with improved angular acceptance Open
In order to increase the conversion efficiency of photovoltaic concentrators, as well as to reduce the solar tracking cost, a new prismatic concentrator is proposed. The concentrator optics operates both in transmission and in reflection, …
View article: Study of the Cross-Influence between III-V and IV Elements Deposited in the Same MOVPE Growth Chamber
Study of the Cross-Influence between III-V and IV Elements Deposited in the Same MOVPE Growth Chamber Open
We have deposited Ge, SiGe, SiGeSn, AlAs, GaAs, InGaP and InGaAs based structures in the same metalorganic vapor phase epitaxy (MOVPE) growth chamber, in order to study the effect of the cross influence between groups IV and III-V elements…
View article: Results on MOVPE SiGeSn deposition for the monolithic integration of III-V and IV elements in multi-junction solar cells
Results on MOVPE SiGeSn deposition for the monolithic integration of III-V and IV elements in multi-junction solar cells Open
View article: A new theoretical approach for the performance simulation of multijunction solar cells
A new theoretical approach for the performance simulation of multijunction solar cells Open
A new theoretical approach is proposed for the performance simulation of multijunction (MJ) solar cells, starting from the weakness and strength of the Hovel model and of the transfer matrix method for describing the propagation of electro…
View article: New Maximum Power Point Tracking MPPT Algorithm Based on Research of a Target Voltage Range and Its Implementation in a Commercial Inverter for Photovoltaic Systems
New Maximum Power Point Tracking MPPT Algorithm Based on Research of a Target Voltage Range and Its Implementation in a Commercial Inverter for Photovoltaic Systems Open
The performance of PV systems, especially in urban environment, are effected by the partial shading of the PV modules, which can be due to the presence of obstacles like, chimneys, antennas, adjacent buildings, trees or due to non-uniform …
View article: New Results on SiGeSn MOVPE Grown for Multi-Junction Solar Cells
New Results on SiGeSn MOVPE Grown for Multi-Junction Solar Cells Open
New results concerning SiGeSn deposited by MOVPE in the same growth chamber utilized for III-V deposition are reported. The ternary material has been grown on 4 and 6 inch germanium wafers, tin precipitation free, at relatively high growth…
View article: Accurate and low cost sun pointing detector unit for concentrator photovoltaic applications
Accurate and low cost sun pointing detector unit for concentrator photovoltaic applications Open
A new accurate and low cost Position Sensitive Detector (PSD) unit has been developed. The PSD unit can be used both for a precise sun tracking and for an accurate outdoor characterization of the CPV modules. Besides the excellent accuracy…
View article: Anti-soiling coatings for solar cell cover glass: Climate and surface properties influence
Anti-soiling coatings for solar cell cover glass: Climate and surface properties influence Open
View article: MOVPE SiGeSn development for the next generation four junction solar cells
MOVPE SiGeSn development for the next generation four junction solar cells Open
The Multijunction (MJ) monolithic approach is very attractive for a competitive concentrating photovoltaic (CPV) technology; it has been successfully applied for InGaP/GaInAs/Ge triple-junction structures but it is more difficult to be exp…
View article: Innovative test facility for a comparative outdoor CPV modules characterization
Innovative test facility for a comparative outdoor CPV modules characterization Open
The paper describes an innovative Test Facility for the outdoor photovoltaic concentrator module (CPV) characterization which allows simultaneous module I-V curve measurements while ensuring a very precise alignment of each CPV module. Fur…
View article: Optical modelling based on angle and temperature dependent EQE measurements on III-V multi-junction solar cells
Optical modelling based on angle and temperature dependent EQE measurements on III-V multi-junction solar cells Open
International audience
View article: CPVMatch - Concentrating photovoltaic modules using advanced technologies and cells for highest efficiencies
CPVMatch - Concentrating photovoltaic modules using advanced technologies and cells for highest efficiencies Open
This paper presents the project Concentrating Photovoltaic modules using advanced technologies and cells for highest efficiencies (CPVMatch), which has received funding from the European Union’s Horizon 2020 research and innovation program…
View article: Low Growth Temperature MOCVD InGaP for Multi-junction Solar Cells
Low Growth Temperature MOCVD InGaP for Multi-junction Solar Cells Open
In view of the realization of high efficiency four-junction solar cells, InGaP layers, lattice matched to InGaAs, and (001) 6° off Ge substrate are grown by low pressure MOCVD at growth temperatures as low as 500 °C. The grown samples are …
View article: Superhydrophilic self-cleaning surfaces based on TiO2 and TiO2/SiO2 composite films for photovoltaic module cover glass
Superhydrophilic self-cleaning surfaces based on TiO2 and TiO2/SiO2 composite films for photovoltaic module cover glass Open
Self-cleaning surfaces have excelled in recent years in energy and environmental fields. In particular, in solar energy area, these surfaces are used to avoid soiling accumulation on photovoltaic (PV) modules. So far TiO 2 has been widely …