Volume 14, 2023
Special Issue on ‘EU PVSEC 2023: State of the Art and Developments in Photovoltaics’, edited by Robert Kenny and João Serra
|Number of page(s)||8|
|Section||High Efficiency Materials and Devices - New concepts|
|Published online||17 October 2023|
Impact of organic particles from wafer handling equipment on silicon heterojunction pseudo-efficiency
Fraunhofer Institute for Solar Energy Systems (F-ISE), Freiburg, Germany
* e-mail: email@example.com
Received in final form: 8 August 2023
Accepted: 13 September 2023
Published online: 17 October 2023
Within this paper a systematic analysis of particle transfer onto SHJ Solar cell precursors by handling with suction cups and the impact on the pseudo efficiency is presented. The study establishes a correlation between particle area coverage and a resulting loss of pseudo solar cell parameters. The analysis was carried out on one hand by means of SEM measurements at the contact points between suction cup and wafer to quantify particle transfer and on the other hand by means of suns photoluminescence imaging measurements to evaluate the resulting losses. It is shown that the choice of contact material and the wafer temperature have a significant influence on the transferred particle number, their size and the resulting particle area coverage. A local electrical defect was observed at these particle-rich spots, which also affected a larger area around this insufficiently passivated region. This had a significant negative effect on the pseudo efficiency, which is more pronounced for increasing particle area coverage. If the particle density is increased by 0.1% within an area of 800 mm2, the pseudo efficiency in this area decreases by almost 1.2%Relative. The correlation found can be used to predict an efficiency loss using standard photoluminescence images.
Key words: SHJ / handling / passivation defects / particles
© A. Fischer et al., Published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.