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Impact of composition and morphology on the optical properties of Si-NC/P3HT th...
Rodrigues, F. D.; Cunha, Mara; Hilliou, L.; Rino, L.; Correia, M. R.; Busani, T.; Bernardo, Gabriel; Wiggers, H.; Filonovich, Sergey; Pereira, R. N.Blends of Si nanocrystals (Si-NCs) and organic semiconductors are promising materials for new optical and electronic devices processed from solutions. Here, we study how the optical properties of composite films containing Si-NCs and the organic semiconductor poly(3-hexylthiophene) (P3HT) are influenced by the composition and morphology resulting from different solution-processing parameters and different solve...
Recent progress in the understanding and manipulation of morphology in polymer ...
Bernardo, Gabriel; Bucknall, David G.Provisional chapter ; Fullerene-based organic photovoltaic devices (OPVs) have attracted increasing interest as a low-cost, lightweight, flexible and easy to process alternative to the silicon-based solar cells. Currently the most efficient fullerene-based OPV devices, although improving dramatically in the last few years, are still a long way from a technologically useful efficiency. The performance of curren...
Solid state processing of conjugated polymer-fullerene blends
Bernardo, Gabriel; Shofner, Meisha; Bucknall, David G.If the future global future energy needs are to be met, renewable energies must be exploited. The possibility of cheap, but efficient organic or polymer based photovoltaic (OPV) devices are among the competing technologies, which are actively being studied. To date the most efficient OPV devices are based on conjugated polymer-fullerene bulk heterojunctions (BHJ). The choice of polymer and fullerene is a balanc...
Phase-morphology and molecular structure correlations in model fullerene-polyme...
Bernardo, Gabriel; Bucknall, David G.; Shofner, Meisha; Sumpter, Bobby; Karim, Alamgir; Nabankur, Deb; Raghavan, Dharmaraj; Sides, Scott; Huq, AbulOrganic or polymer based photovoltaic devices promise solar technologies that are inexpensive enough to be widely exploited and therefore provide a significant fraction of the future energy needs. There are many promising polymer-fullerene mixtures that are promising materials candidates for achieving high performance device, but their exploitation requires an improved understanding of their structure-property ...
Thermodynamic effects in morphological evolution of polymer-fullerene nanocompo...
Bernardo, Gabriel; Sumpter, Bobby; Bucknall, David G.Polymer based photovoltaic devices promise solar technologies that are inexpensive enough to be widely exploited and therefore provide a significant fraction of the future energy needs. There are many promising polymer-fullerene mixtures that are promising materials candidates for achieving high performance devices, but their exploitation requires and improved understanding of their structure-property relations...
Associação da variabilidade da precipitação pluvial em Santa Maria com a Oscila...
Streck,Nereu Augusto; Buriol,Galileo Adeli; Heldwein,Arno Bernardo; Gabriel,Luana Fernandes; Paula,Gizelli Moiano deO objetivo deste trabalho foi verificar a associação da variabilidade interdecadal da chuva em Santa Maria, RS, com a Oscilação Decadal do Pacífico. Parte da variabilidade interanual da precipitação pluvial é explicada pelo fenômeno El Niño Oscilação Sul (ENOS), que acontece no Oceano Pacífico. Na segunda metade da década de 1990, foi relatada outra oscilação na temperatura do Oceano Pacífico, de duração maior ...
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