Development of 40 μm thin flexible silicon heterojunction solar cells
| Autor: | Pradeep Balaji, Stuart Bowden, Andre Augusto, William J. Dauksher |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Silicon business.industry Open-circuit voltage chemistry.chemical_element Heterojunction 02 engineering and technology Carrier lifetime 021001 nanoscience & nanotechnology 01 natural sciences Indium tin oxide chemistry Sputtering 0103 physical sciences Optoelectronics Wafer Power semiconductor device 0210 nano-technology business |
| Zdroj: | 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC). |
| Popis: | Large-scale production of flexible solar cells is paving the way to portable, low cost power devices. Whereas energy conversion of commercial devices is in the range of 5-15 %, our goal is to manufacture low cost, flexible solar cells with efficiencies over 20%. In this paper we present our latest development on flexible silicon heterojunction solar cells using 40 $\mu$m thin silicon wafers. Currently, sputtering induces surface damage which leads to an open circuit voltage drop of 15-20 mV when compared to implied open circuit voltages. The degradation of minority carrier lifetime after sputtering can be mitigated, from a maximum of 38% down to 17%, through a 70% reduction in the DC plasma power, thereby increasing the reliability of the process. We experimentally demonstrate average minority carrier lifetimes over 1300 $\mu$s and ${\mathrm {iV}}_{{\mathrm {OC}}}$ over 760 mV for 40 $\mu$m thin wafers. |
| Databáze: | OpenAIRE |
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