Low surface recombination in silicon-heterojunction solar cells with rear laser-fired contacts from aluminum foils
Visualitza/Obre
10.1109/JPHOTOV.2015.2411055
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/28117
Tipus de documentArticle
Data publicació2015-05-01
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
In this study, an approach to create laser-fired contacts from aluminum foils is studied on p-type silicon-heterojunction solar cells. This alternative approach consists of the use of aluminum foils instead of evaporated layers as a metal source and rear electrode for the laser-firing process. A q-switched infrared laser (1064 nm) was employed to create the local point contacts. Quasi-steady-state photoconductance measurements evidenced a limited degradation in the surface passivation quality during the laser-firing process. Heterojunction solar cells fabricated with these rear contacts reached a best conversion efficiency of 18% with a remarkable open-circuit voltage of 690 mV. These values were very close to those of reference devices fabricated with evaporated aluminum layers. This result suggests a similar effect on the rear surface passivation by both contact strategies. However, external quantum efficiency curves revealed a better response from devices with a rear aluminum foil in the near infrared. Optical measurements indicate that this effect can be related to a higher internal reflection at the back surface. Consequently, laser-fired contacts from aluminum foils appear to be a fast and convenient solution for the rear contact of high-efficiency silicon solar cells.
CitacióColina, M.A. [et al.]. Low surface recombination in silicon-heterojunction solar cells with rear laser-fired contacts from aluminum foils. "IEEE Journal of Photovoltaics", 01 Maig 2015, vol. 5, núm. 3, p. 805-811.
ISSN2156-3381
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
final draft JPV-2014-06-0143-R.R4.pdf | accepted manuscript | 697,1Kb | Visualitza/Obre |