resumo
The mismatch between the AM1.5G spectrum and the photovoltaic (PV) cells absorption is one of the most limiting factors for PV performance. To overcome this constraint through the enhancement of solar energy harvesting, luminescent downshifting (LDS) layers are very promising to shape the incident sunlight and, thus, we report here the use of Tb3+ and Eu3+-doped organic-inorganic hybrid materials as LDS layers on Si PV cells. Electrical measurements on the PV cell, done before and after the deposition of the LDS layers, confirm the positive effect of the coatings on the cell's performance in the UV spectral region. The maximum delivered power and the maximum absolute external quantum efficiency increased 14% and 27%, respectively. Moreover, a solar powered car race was organized in which the small vehicle containing the coated PV cells presented a relative increase of 9% in the velocity, when compared to that with the uncoated one.
palavras-chave
ORGANICALLY MODIFIED SILICATES; SALICYLIC-ACID; TERBIUM COMPLEXES; CELL EFFICIENCY; PERFORMANCE; CONCENTRATORS; FLUORESCENCE; IMPROVEMENT; COATINGS; EUROPIUM
categoria
Optics
autores
Correia, SFH; Bastos, ARN; Fu, LS; Carlos, LD; Andre, PS; Ferreira, RAS
nossos autores
Luís Carlos
Professor Catedrático
Maria Rute de Amorim e Sá Ferreira André
Professor Catedrático
Sandra Filipa Henriques Correia
InvestigadorProjectos
CICECO - Aveiro Institute of Materials (UID/CTM/50011/2019)
SusPhotoSolutions - Soluções Fotovoltaicas Sustentáveis (SUSPHOTOSOLUTIONS)
Díodos emissores de luz (LEDs) branca, inovadores, sintonizáveis e sustentáveis (WINLEDs)
agradecimentos
This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, (UID/CTM/50011/2019), Instituto de Telecomunicacoes (UID/EEA/50008/2019), Solar-Flex (CENTRO-01-0145-FEDER-030186), and SusPhotoSolutions (CENTRO-01-0145-FEDER-000005) financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership through European Regional Development Fund (ERDF) in the frame of Operational Competitiveness and Internationalization Programme (POCI). L.S.F. and A. R. N. B. thank WINLEDs (POCI-01-0145-FEDER-030351) and NanoHeatControl (POCI-01-0145-FEDER-031469), respectively. Joaquim Almeida from Escola Secundaria de Oliveira do Bairro, Portugal is acknowledged for providing the photo finish images.