Abstract
In order to reduce the costs of thin-film silicon solar cell production, a manufacturing concept in which amorphous silicon (a-Si) solar cells are produced in a roll-to-roll manner on a temporary metal substrate (temporary-superstrate process) has been introduced in the Helianthos Project. Later in the process the device is transferred to a permanent plastic substrate on which cells are monolithically series connected, resulting in PV modules. In the Helianthos pilot line, modules with efficiencies above 7% are obtained on 1-foot-wide foil. On 30times30 cm/sup 2/ modules, initial efficiencies of 5.7% have been reached, while 60 cm/sup 2/ modules cut from the 35 cm wide foil have reached stabilized efficiencies of 5.8%. Lab modules with the deposition of a-Si in a batch process on roll-to-roll deposited SnO/sub 2/, have reached stabilized efficiencies of 6.7%. In order to increase efficiency, amorphous/microcrystalline (a-Si/muc-Si) tandem solar cells have been implemented in the temporary-superstrate process to fabricate flexible, lightweight tandem modules with monolithic series integration. A first module with an aperture area efficiency of 8.6% has been presented earlier. At present, an initial aperture area efficiency of 9.4% has been reached on a 60 cm/sup 2/ module
Original language | English |
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Title of host publication | Conference record of the 2006 IEEE 4th World Conference on Photovoltaic Energy Conversion. Waikoloa, HI, USA. IEEE Electron Devices Soc. 7-12 May 2006 |
Place of Publication | Piscataway, NJ, USA |
Publisher | Institute of Electrical and Electronics Engineers |
Pages | 1716-1719 |
ISBN (Print) | 1-424-40016-3 |
DOIs | |
Publication status | Published - 2006 |
Event | conference; WCPEC : IEEE World Conference on Photovoltaic Energy Conversion ; 4 (Waikoloa, Hawaii) : 2006.05.07-12 - Duration: 1 Jan 2006 → … |
Conference
Conference | conference; WCPEC : IEEE World Conference on Photovoltaic Energy Conversion ; 4 (Waikoloa, Hawaii) : 2006.05.07-12 |
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Period | 1/01/06 → … |
Other | WCPEC : IEEE World Conference on Photovoltaic Energy Conversion ; 4 (Waikoloa, Hawaii) : 2006.05.07-12 |