Laser contact openings for local poly-Si-metal contacts enabling 26.1%-efficient POLO-IBC solar cells
By F. Haase, C. Hollemann, S. Schäfer, A. Merkle, M. Rienäcker, J. Krügener, R. Brendel, Robby Peibst. Solar Energy Materials and Solar Cells, 2018
540 citations recorded by the source corpus.
Abstract We demonstrate damage-free laser contact openings in silicon oxide layers on polycrystalline silicon on oxide (POLO) passivating contacts. A pulsed UV-laser evaporates the upper part of the polycrystalline silicon layer, lifting off the silicon oxide layer on top. On n -type POLO (and p -type POLO, respectively) samples a saturation current density of 2 fA cm −2 (6 fA cm −2 ) and an implied open-circuit voltage of 733 mV (727 mV) are achieved with a laser contact opening area fraction of 12.3% (8.7%). The application of this ablation process in an interdigitated back contact solar cell leads to an independently confirmed power conversion efficiency of 26.1%. The excellent contact quality of the laser contact openings is proven by the low series resistance of 0.1 Ω cm 2 on the solar cell with a contact area of only 3%.
Subfields: Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/c2b92edecf0d002446f8cd432b19b48e0288fdc3
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Electrical and Electronic Engineering
Citations in the corpus
- Mass production of industrial tunnel oxide passivated contacts (i‐TOPCon) silicon solar cells with average efficiency over 23% and modules over 345 W (2019, background): “1% efficiency was reported with thin SiOx/doped poly‐Si passivation by ISFH.(27) The success of development of TOPCon cell in the laboratory attracted the attention and interest of the PV industry.”