The Use of Amorphous Silicon in Fabricating a Photovoltaic-Thermal ...

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Temperature Coefficient • a-Si:H PV temperature coefficient: • short-term: -0.1%/ºC [Emery et al, 1996] • if kept at high temperature: +0.5%/ºC [Luque et al, 2003] • a-Si:H PV module case study: • module kept at 60ºC during daylight hours generated 20% more energy than module kept at 35ºC [Hof et al, 1996] • Attributed to slow, low-temperature anneal of SWE [Luque et al, 2003] • Alleviates thermal-electrical tradeoff University of Toronto
Improved Thermal Efficiency Increased Incident Radiation: • Direct deposition onto STC increases incident radiation onto STC Lower Emissivity: • Using low emissivity PV cells will reduce significance of highly emissive laminate • PV emissivity: • c-Si: 40% [Platz et al, 1997] • a-Si:H: 30% [Affolter et al, 2000] • Commercial low-E coatings used in STC:
Page 1 and 2: The Use of Amorphous Silicon in Fab
Page 3 and 4: Thermal Generation in PV • Conver
Page 5 and 6: Current Status in PV/T • Practica
Page 7 and 8: a-Si:H PV/T • Lower cost • Impr
Page 9: Staebler-Wronski Effect • a-Si:H
Page 13 and 14: Lower Cell Emissivity • Replace p
Page 15 and 16: Summary • PV/T utilizes intrinsic
Page 17 and 18: References Affolter, P., Ruoss, D.,
Page 19 and 20: References Ogden, T.R., Rathsam, A.
Page 21: Thank you for your attention! Any Q

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