Helder Scapin Anizelli
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Research Subjects
Helder Scapin Anizelli has a total of 25 co-authors. Here are the top co-authors by number of shared publications:
José Leonil Duarte
Univ Estadual Londrina, Ctr Ciencias Exatas, Dept Fis, BR-86051990 Londrina, PR, Brazil
3 shared publications- Ricardo Vignoto Fernandes
Universidade Estadual de Londrina
3 shared publications - Edson Laureto
Universidade Estadual de Londrina
2 shared publications Jeff Kettle
2 shared publications- Tudur Wyn David
School of Computer Science and Electronic Engineering, Bangor University, Dean Street, Bangor, Gwynedd, Wales LL57 1UT, U.K.
2 shared publications Vasil Stoichkov
2 shared publications
Latest Publications
- 1 November 2020
- Published by AIP Publishing in Journal of Renewable and Sustainable Energy
- Vol. 12 (6) , 063502
Outdoor performance of organic photovoltaics at two different locations: A comparison of degradation and the effect of condensation
Tests on organic photovoltaics (OPV) mini modules, fabricated through a R2R process, in air and without hazardous solvents have been conducted in order to compare their outdoor performance, in Belo Horizonte, Brazil, and Bangor, North Wales, and assess the impact of the latitude and climate of the installation on the power generation and modules' lifetime. The test showed different profiles of degradation for each region and formulation, with a surprisingly faster degradation in Bangor. One of the possible sources of the increased degradation is the greater levels of condensation observed in Bangor. To verify the impact of condensation on the module stability, indoor tests have been conducted to relate the dew point depression to module degradation times. The results show that condensation is a significant stress factor in OPV and should be considered more prominently in reliability studies.
- 1 November 2020
- Published by AIP Publishing in Journal of Renewable and Sustainable Energy
- Vol. 12 (6) , 063502
Outdoor performance of organic photovoltaics at two different locations: A comparison of degradation and the effect of condensation
Tests on organic photovoltaics (OPV) mini modules, fabricated through a R2R process, in air and without hazardous solvents have been conducted in order to compare their outdoor performance, in Belo Horizonte, Brazil, and Bangor, North Wales, and assess the impact of the latitude and climate of the installation on the power generation and modules' lifetime. The test showed different profiles of degradation for each region and formulation, with a surprisingly faster degradation in Bangor. One of the possible sources of the increased degradation is the greater levels of condensation observed in Bangor. To verify the impact of condensation on the module stability, indoor tests have been conducted to relate the dew point depression to module degradation times. The results show that condensation is a significant stress factor in OPV and should be considered more prominently in reliability studies.
- 16 September 2019
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Photovoltaics
- Vol. 9 (6) , 1768-1773
Using Large Datasets of Organic Photovoltaic Performance Data to Elucidate Trends in Reliability Between 2009 and 2019
The application of data analytical approaches to understand long-term stability trends of organic photovoltaics (OPVs) is presented. Nearly 1900 OPV data points have been catalogued, and multivariate analysis has been applied in order to identify patterns, produce models that quantitatively compare different internal and external stress factors, and subsequently enable predictions of OPV stability to be achieved. Analysis of the weights associated with the acquired predictive model shows that for light stability (ISOS-L) testing, the most significant factor for increasing the time taken to reach 80% of the initial performance (T $_{80}$ ) is the substrate and top electrode selection, and the best light stability is achieved with a small molecule active layer. The weights for damp-heat (ISOS-D) testing shows that the type of encapsulation is the primary factor affecting the degradation to T $_{80}$ . The use of data analytics and potentially machine learning can provide researchers in this area new insights into degradation patterns and emerging trends.- 16 September 2019
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Photovoltaics
- Vol. 9 (6) , 1768-1773
Using Large Datasets of Organic Photovoltaic Performance Data to Elucidate Trends in Reliability Between 2009 and 2019
The application of data analytical approaches to understand long-term stability trends of organic photovoltaics (OPVs) is presented. Nearly 1900 OPV data points have been catalogued, and multivariate analysis has been applied in order to identify patterns, produce models that quantitatively compare different internal and external stress factors, and subsequently enable predictions of OPV stability to be achieved. Analysis of the weights associated with the acquired predictive model shows that for light stability (ISOS-L) testing, the most significant factor for increasing the time taken to reach 80% of the initial performance (T $_{80}$ ) is the substrate and top electrode selection, and the best light stability is achieved with a small molecule active layer. The weights for damp-heat (ISOS-D) testing shows that the type of encapsulation is the primary factor affecting the degradation to T $_{80}$ . The use of data analytics and potentially machine learning can provide researchers in this area new insights into degradation patterns and emerging trends.- 1 July 2018
- Published by Elsevier in Journal of Luminescence
- Vol. 199, 348-351
Effect of pressure on the remixing process in CH3NH3Pb(I1-xBrx)3 perovskite thin films
- 1 July 2018
- Published by Elsevier in Journal of Luminescence
- Vol. 199, 348-351
Effect of pressure on the remixing process in CH3NH3Pb(I1-xBrx)3 perovskite thin films
- 1 October 2017
- Published by Elsevier in Organic Electronics
- Vol. 49, 129-134
Application of luminescence downshifting materials for enhanced stability of CH3NH3PbI3(1-x)Cl3x perovskite photovoltaic devices
- 1 October 2017
- Published by Elsevier in Organic Electronics
- Vol. 49, 129-134
Application of luminescence downshifting materials for enhanced stability of CH3NH3PbI3(1-x)Cl3x perovskite photovoltaic devices
- 30 November 2016
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 50 (2) , 025103
Development of multidye UV filters for OPVs using luminescent materials
Luminescence down-shifting (LDS) is used in several photovoltaic technologies aiming to improve the photon conversion efficiency (PCE) of the devices through the increase of the light harvesting in the regions of the electromagnetic spectrum where the EQE of the solar cells is poor. The aim of this work was to produce films of mixtures (blends) of two luminescent materials, dispersed in a poly-methyl methacrylate (PMMA) matrix, hoping to improve their properties both as LDS layer and as UV filter when applied on the clear, external surface of P3HT:PC 61 BM photovoltaic devices. The best results led to an increment of 7.4% in the PCE of the devices, and a six fold enhancement in their half-life ( T 50% ). This study indicates that multidye LDS layers with optimized optical properties can lead to an effective improvement in the performance and operational stability of OPVs.
- 30 November 2016
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 50 (2) , 025103
Development of multidye UV filters for OPVs using luminescent materials
Luminescence down-shifting (LDS) is used in several photovoltaic technologies aiming to improve the photon conversion efficiency (PCE) of the devices through the increase of the light harvesting in the regions of the electromagnetic spectrum where the EQE of the solar cells is poor. The aim of this work was to produce films of mixtures (blends) of two luminescent materials, dispersed in a poly-methyl methacrylate (PMMA) matrix, hoping to improve their properties both as LDS layer and as UV filter when applied on the clear, external surface of P3HT:PC 61 BM photovoltaic devices. The best results led to an increment of 7.4% in the PCE of the devices, and a six fold enhancement in their half-life ( T 50% ). This study indicates that multidye LDS layers with optimized optical properties can lead to an effective improvement in the performance and operational stability of OPVs.