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Estratégias fotónicas para fotovoltaico : novos avanços para além da ótica
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Abstract(s)
RESUMO: Estruturas fotónicas com tamanhos comparáveis aos comprimentos de onda da luz solar são as soluções preferenciais para melhorar a eficiência de dispositivos fotovoltaicos através de aprisionamento de luz. As micro-estruturas fotónicas aqui desenvolvidas operam no regime de ótica de ondas, pelo que foram construídos modelos eletromagnéticos que permitiram encontrar os parâmetros ótimos para aplicação no contacto frontal de diferentes tipos de tecnologias, nomeadamente em células de filme fino baseadas em silício ou perovskite. Desta forma, foram obtidas diferentes arquiteturas fotónicas de células, demonstrando melhoras de até 50% na eficiência relativamente a células de referência planas. Os resultados mostram que as vantagens da aplicação de estruturas fotónicas não estão só limitadas a ganhos óticos de melhora da absorção, mas também possibilitam outros benefícios importantes tais como: ganhos elétricos devido à melhora dos contactos transparentes, e melhor desempenho em condições ambientais devido a um encapsulamento avançado dos dispositivos que confere até propriedades de auto-limpeza dos mesmos.
ABSTRACT: Photonic structures with dimensions comparable to the sunlight wavelengths are now regarded as the preferential solutions to enhance the efficiency of photovoltaic devices via light trapping. The photonic microstructures operate in the regime of wave-optics, so electromagnetic models were constructed that were capable of determining the optimal parameters for application in the front contact of different photovoltaic technologies, namely in thin film solar cells based in silicon or perovskite materials. In this way, distinct photonic cell architectures were obtained, showing efficiency improvements up to 50% with respect to planar reference solar cells. The results demonstrate that the advantages in the application of the photonic structures are not just limited to optical gains related with light absorption enhancement, but also enable other important benefits such as: electrical gains due to the improvement of the front contact conductance, and better environmental/outdoor performance due to an advanced micro-structured encapsulation that even allows self-cleaning properties.
ABSTRACT: Photonic structures with dimensions comparable to the sunlight wavelengths are now regarded as the preferential solutions to enhance the efficiency of photovoltaic devices via light trapping. The photonic microstructures operate in the regime of wave-optics, so electromagnetic models were constructed that were capable of determining the optimal parameters for application in the front contact of different photovoltaic technologies, namely in thin film solar cells based in silicon or perovskite materials. In this way, distinct photonic cell architectures were obtained, showing efficiency improvements up to 50% with respect to planar reference solar cells. The results demonstrate that the advantages in the application of the photonic structures are not just limited to optical gains related with light absorption enhancement, but also enable other important benefits such as: electrical gains due to the improvement of the front contact conductance, and better environmental/outdoor performance due to an advanced micro-structured encapsulation that even allows self-cleaning properties.
Description
CIES2020 - XVII Congresso Ibérico e XIII Congresso Ibero-americano de Energia Solar
Keywords
Solar energy Thin-film photovoltaic Photonics Solar cells
Citation
Mendes, M.J... [et.al.] - Estratégias fotónicas para fotovoltaico : novos avanços para além da ótica. In: CIES2020: As Energias Renováveis na Transição Energética: Livro de Comunicações do XVII Congresso Ibérico e XIII Congresso Ibero-americano de Energia Solar. Helder Gonçalves, Manuel Romero (Ed.). Lisboa, Portugal: LNEG, 3-5 Novembro, 2020, p. 193-200
Publisher
LNEG - Laboratório Nacional de Energia e Geologia