10 documents found, page 1 of 1
Dielectric UV filters for protection of fire-resistant glass based on intumesce...
Silva, Ricardo Magno Lopes; Hashim, Hurraira; Roy, Deepto; Oliveira Fernandes, Carolina; Oliveira, Kevin; Leitão Pinheiro, Xavier AlexandreABSTRACT: Structures such as OLEDs, perovskite solar cells, intumescent glasses, and other components in modern devices and buildings contain materials suscep-tible to degradation when exposed to UV radiation, requiring protection to with-stand outdoor environmental conditions. In this work, multilayer coating config-ured as a Bragg Reflector on glass is employed as spectral filtering to protect the intumescent...
Over 100 mV VOC improvement for rear passivated ACIGS ultra‐thin solar cells
Oliveira, Antonio; Rocha Curado, Marco; Teixeira, J. P.; Tomé, Daniela; Çaha, Ihsan; Oliveira, Kevin; Lopes, Tomás; Monteiro, Margarida; Violas, AndréA decentralized energy system requires photovoltaic solutions to meet new aesthetic paradigms, such as lightness, flexibility, and new form factors. Notwithstanding, the materials shortage in the Green Transition is a concern gaining momentum due to their foreseen continuous demand. A fruitful strategy to shrink the absorber thickness, meeting aesthetic and shortage materials consumption targets, arises from in...
SiOx Patterned Based Substrates Implemented in Cu(In,Ga)Se2 Ultrathin Solar Cel...
Oliveira, Kevin; Teixeira, Jennifer P.; Chen, Wei-Chao; Lontchi Jioleo, Jackson; Oliveira, Antonio J. N.; Caha, Ihsan; Francis, Leonard DeepakInterface recombination in sub-µm optoelectronics has a major detrimental impact on devices’ performance, showing the need for tailored passivation strategies to reach a technological boost. In this work, SiOx passivation based substrates were developed and integrated into ultrathin Cu(In,Ga)Se2 (CIGS) solar cells. This study aims to understand the impact of a passivation strategy, which uses several SiOx layer...
Cu(In,Ga)Se2 based ultrathin solar cells: the pathway from lab rigid to large s...
Lopes, Tomás; Teixeira, Jennifer; Curado, Marco; Ferreira, Bernado; Oliveira, Antonio; Cunha, José; Monteiro, Margarida; Violas, André; Barbosa, JoãoFor the first time, the incorporation of interface passivation structures in ultrathin Cu(In,Ga)Se2 (CIGS) based solar cells is shown in a flexible lightweight stainless-steel substrate. The fabrication was based on an industry scalable lithography technique - nanoimprint lithography (NIL) - for a 15x15 cm2 dielectric layer patterning, needed to reduce optoelectronic losses at the rear interface. The nanopatter...
Autism spectrum as an etiologic systemic disorder: a protocol for an umbrella r...
Lopes, Lara Teixeira; Rodrigues, Jorge Magalhães; Baccarin, Celeste; Oliveira, Kevin; Abreu, Manuela; Ribeiro, Victor; Anastácio, ZéliaAutism spectrum disorder (ASD) is the most common neurodevelopmental disorder with a huge prevalence increasing every year (1/44 children). Still diagnosed as a mental disorder, the last 10 years of research found possible causes, risks, genetics, environmental triggers, epigenetics, metabolic, immunological, and neurophysiological unbalances as relevant aetiology. Umbrella methodology is the highest level of s...
Optoelectronic simulations for novel light management concepts in Cu(In,Ga)Se2 ...
Oliveira, António J. N.; Barbosa, João R. S.; Violas, André; Teixeira, Jennifer P.; Oliveira, Kevin; Lopes, Tomás; Cunha, José M. V.; Curado, Marco A.One of the trends making its way through the Photovoltaics (PV) industry, is the search for new application possibilities. Cu(In,Ga)Se2 (CIGS) thin film solar cells stand out due to their class leading power conversion efficiency of 23.35 %, flexibility, and low cost. The use of sub-μm ultrathin CIGS solar cells has been gaining prevalence, due to the reduction in material consumption and the manufacturing time...
High‐performance and industrially viable nanostructured siOx layers for interfa...
Cunha, José M. V.; Oliveira, Kevin; Lontchi, Jackson; Lopes, Tomás S.; Curado, Marco A.; Barbosa, João R. S.; Vinhais, Carlos; Chen, Wei-ChaoHerein, it is demonstrated, by using industrial techniques, that a passivation layer with nanocontacts based on silicon oxide (SiOx) leads to significant improvements in the optoelectronical performance of ultrathin Cu(In,Ga)Se2 (CIGS) solar cells. Two approaches are applied for contact patterning of the passivation layer: point contacts and line contacts. For two CIGS growth conditions, 550 and 500 °C, the SiO...
Perovskite metal–oxide–semiconductor structures for interface characterization
Cunha, José M. V.; Barreiros, M. Alexandra; Curado, Marco A.; Lopes, Tomás S.; Oliveira, Kevin; Oliveira, António J. N.; Barbosa, João R. S.Perovskite solar cells (PSCs) are one of the most promising photovoltaic technologies. Amongst several challenges, developing and optimizing efficient electron transport layers (ETLs) that can be up-scaled still remains a massive task. Admittance measurements on Metal-Oxide-Semiconductor (MOS) devices allow to better understand the optoelectronic properties of the interface between perovskite and the charge car...
Encapsulation of Nanostructures in a Dielectric Matrix Providing Optical Enhanc...
Oliveira, Antonio; de Wild, Jessica; Oliveira, Kevin; Valença, Beatriz A.; Guerreiro, Joana Rafaela; Abalde-Cela, Sara; Lopes, TomásThe incorporation of nanostructures in optoelectronic devices for enhancing their optical performance is widely studied. However, several problems related to the processing complexity and the low performance of the nanostructures have hindered such actions in real-life devices. Herein, a novel way of introducing gold nanoparticles in a solar cell structure is proposed in which the nanostructures are encapsulate...
Encapsulation of nanostructures in a dielectric matrix providing optical enhanc...
Oliveira, António J. N.; de Wild, Jessica; Oliveira, Kevin; Valença, Beatriz A.; Teixeira, Jennifer P.; Guerreiro, Joana R. L.; Abalde-Cela, SaraThe incorporation of nanostructures in optoelectronic devices for enhancing their optical performance has been widely studied. However, several problems related with the processing complexity and the low performance of the nanostructures have hindered such actions in reallife devices. In this work, we propose a novel way of introducing gold nanoparticles in a solar cell structure in which the nanostructures are...