Impact of light-induced recombination centres on the current - voltage characteristic of Czochralski silicon solar cells

verfasst von

Jan Schmidt, Andrs Cuevas, Stefan Rein, Stefan W. Glunz

Abstract

We have investigated the effect of the light-induced deep-level recombination centre specific to boron-doped, oxygen-contaminated Czochralski (Cz) silicon on the current-voltage characteristic of Cz silicon solar cells by means of numerical simulation and experiment. The device simulation predicts the occurrence of a shoulder in the current-voltage curve after activating the characteristic recombination centre. The physical reason for the non-ideal diode behaviour, characterised by a local ideality factor greater unity, is the strongly injection-level-dependent bulk lifetime produced by the deep-level centre. The increased ideality factor causes a degradation in fill factor with the magnitude of degradation depending on the doping concentration of the Cz silicon base. In order to verify the theoretical predictions experimentally, we have performed measurements on high-efficiency Cz silicon solar cells. Current-voltage curves recorded before and after light degradation clearly show the theoretically predicted change in shape and the reduction in fill factor. An excellent quantitative agreement between calculation and experiment is obtained for the subtracted current-voltage curves measured after and before illumination.

Externe Organisation(en)

Universität Stuttgart
Fraunhofer-Institut für Solare Energiesysteme (ISE)
Australian National University

Typ

Artikel

Journal

Progress in Photovoltaics: Research and Applications

Band

9

Seiten

249-255

Anzahl der Seiten

7

ISSN

1062-7995

Publikationsdatum

18.07.2001

Publikationsstatus

Elektronisch veröffentlicht (E-Pub)

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektronische, optische und magnetische Materialien, Erneuerbare Energien, Nachhaltigkeit und Umwelt, Physik der kondensierten Materie, Elektrotechnik und Elektronik

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie

Elektronische Version(en)

https://doi.org/10.1002/pip.373 (Zugang: Geschlossen)