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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Cesar, I. Manshanden, P. Janssen, G. Granneman, E. Siarheyeva, O. Weeber, A.W. |
| Copyright Year | 2013 |
| Description | Author affiliation: Levitech BV, Almere, Netherlands (Granneman, E.; Siarheyeva, O.) || ECN Solar Energy, Petten, Netherlands (Cesar, I.; Manshanden, P.; Janssen, G.; Weeber, A.W.) |
| Abstract | The p-type bi-facial cell concept, p-PASHA (Passivated on all sides H-pattern), is developed at ECN and employs an uncapped $Al_{2}O_{3}$ passivation layer on the rear through which a screen printed H-pattern of aluminium contacts is fired. Here we report a net gain in cell efficiency of 0.2% absolute for the p-PASHA cell vs. industrial reference with the addition of a clean and an ALD step. Even higher gains up to 0.5% abs. are expected after optimization of the cell design and process. Apart from the efficiency gain, the bi-facial cell concept allows for 50-80% reduction in Al paste consumption, the use of thinner wafers, and consists of less processing steps compared to prevalent PERC concepts. The $Al_{2}O_{3}$ dielectric layer is deposited in the Levitrack, an industrial-type system for high-throughput Atomic Layer Deposition (ALD) developed by Levitech. The efficiency gain is obtained on multi-crystalline wafers, at a rear metal fraction of 40%. Localized IQE mapping, cross-sectional SEM investigation, resistance measurements and 2D simulation relate the efficiency improvement compared to our conventional process to better eutectic and BSF formation at the Al contact edges. |
| Sponsorship | IEEE Electron Devices Soc. |
| Starting Page | 1212 |
| Ending Page | 1217 |
| File Size | 1434669 |
| Page Count | 6 |
| File Format | |
| DOI | 10.1109/PVSC.2013.6744358 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-06-16 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Aluminum oxide Dielectrics Passivation Photovoltaic cells Firing Metallization eutectic Bi-facial p-type Al |
| Content Type | Text |
| Resource Type | Article |
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