Title :
Improvement of polymorphous/crystalline heterojunction solar cells using low temperature screen-printed pastes
Author :
Veschetti, Y. ; Muller, J.C. ; Damon-Lacoste, J. ; Cabarrocas, P. Roca i ; Gudovskikh, A.S. ; Kleider, J.P. ; Ribeyron, P.J. ; Rolland, E.
Author_Institution :
PHASE-CNRS, Strasbourg, France
Abstract :
An alternative way to conventional solar cell process is to develop a low temperature process using hydrogenated amorphous silicon (a-Si:H) thin film deposited by PECVD on bulk crystalline silicon. The French national project "SiNERGIES" aims to improve polymorphous/crystalline heterojunction (a-Si:H/pm-Si:H/c-Si) on p-type crystalline silicon (c-Si) to achieve large area solar cells for industrial application. We present the advancement of the project, focusing on low temperature screen-printed pastes (LT-SP) as well as the analysis of the pm-Si:H/c-Si interface quality. Up to now, solar cells of 25 cm2 area using CZ (Si) substrate achieved efficiency close to 13.5% with a maximum fill factor of 70% with LT-SP from Dupont MCM. A simulation study gives insight into the possible improvements.
Keywords :
amorphous semiconductors; elemental semiconductors; hydrogen; plasma CVD; semiconductor growth; semiconductor heterojunctions; silicon; solar cells; thick films; PECVD; Si:H; SiNERGIES; fill factor; hydrogenated amorphous silicon thin film; low temperature screen-printed pastes; polymorphous-crystalline heterojunction solar cells; Amorphous silicon; Annealing; Capacitance; Crystallization; Heterojunctions; Photovoltaic cells; Semiconductor thin films; Sputtering; Substrates; Temperature;
Conference_Titel :
Photovoltaic Specialists Conference, 2005. Conference Record of the Thirty-first IEEE
Print_ISBN :
0-7803-8707-4
DOI :
10.1109/PVSC.2005.1488335
