A photonic-plasmonic structure for enhancing light absorption in thin film solar cells
2011; American Institute of Physics; Volume: 99; Issue: 13 Linguagem: Inglês
10.1063/1.3641469
ISSN1520-8842
AutoresJoydeep Bhattacharya, Nayan Chakravarty, Sambit Pattnaik, W. Dennis Slafer, R. Biswas, Vikram L. Dalal,
Tópico(s)Nanowire Synthesis and Applications
ResumoWe describe a photonic-plasmonic nanostructure, for significantly enhancing the absorption of long-wavelength photons in thin-film silicon solar cells, with the promise of exceeding the classical 4n2 limit for enhancement. We compare identical solar cells deposited on the photonic-plasmonic structure, randomly textured back reflectors and silver-coated flat reflectors. The state-of-the-art back reflectors, using annealed Ag or etched ZnO, had high diffuse and total reflectance. For nano-crystalline Si absorbers with comparable thickness, the highest absorption and photo-current of 21.5 mA/cm2 was obtained for photonic-plasmonic back-reflectors. The periodic photonic plasmonic structures scatter and reradiate light more effectively than a randomly roughened surface.
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