Perimeter recombination in 25%-efficient IBC solar cells with passivating POLO contacts for both polarities

verfasst von

Felix Haase, Sören Schäfer, Christina Klamt, Fabian Kiefer, Jan Krügener, Rolf Brendel, Robby Peibst

Abstract

We introduce a method for the quantification of perimeter recombination in solar cells based on infrared lifetime measurements. We apply this method at a 25.0%-efficient interdigitated back contact (IBC) silicon solar cell with passivating contacts. The implied pseudo-efficiency determined by infrared lifetime mapping is 26.2% at an intermediate process step. The 1.2%abs loss is attributed to a process-related reduction in surface passivation quality, recombination in the perimeter area, and series resistance. The 2×2 cm²-sized cell is processed on a 100mmwafer. We determine the implied pseudo-efficiency with illuminated and with shaded perimeter area during infrared lifetime mapping. The difference between both implied pseudo-efficiencies yields the efficiency loss by perimeter recombination, which is determined to be 0.4%abs for a wafer resistivity of 1.3 ω cm and even 0.9%abs for a wafer resistivity of 80 ω cm.

Organisationseinheit(en)

Laboratorium für Nano- und Quantenengineering
Institut für Materialien und Bauelemente der Elektronik
Institut für Festkörperphysik

Externe Organisation(en)

Institut für Solarenergieforschung GmbH (ISFH)

Typ

Artikel

Journal

IEEE journal of photovoltaics

Band

8

Seiten

23-29

Anzahl der Seiten

7

ISSN

2156-3381

Publikationsdatum

01.2018

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektronische, optische und magnetische Materialien, Physik der kondensierten Materie, Elektrotechnik und Elektronik

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie

Elektronische Version(en)

https://doi.org/10.1109/jphotov.2017.2762592 (Zugang: Geschlossen)