Breakdown of the efficiency gap to 29% based on experimental input data and modeling

verfasst von

Rolf Brendel, Thorsten Dullweber, Robby Peibst, Christopher Kranz, Agnes Merkle, Daniel Walter

Abstract

We demonstrate a procedure for quantifying efficiency gains that treats resistive, recombinative, and optical losses on an equal footing. For this, we apply our conductive boundary model as implemented in the Quokka cell simulator. The generation profile is calculated with a novel analytical light-trapping model. This model parameterizes the measured reflection spectra and is capable of turning the experimental case gradually into an ideal Lambertian scheme. Simulated and measured short-circuit current densities agree for our 21.2%-efficient screen-printed passivated emitter and rear cell and for our 23.4%-efficient ion-implanted laser-processed interdigitated back-contacted cell. For the loss analysis of these two cells, we set all experimentally accessible control parameters (e.g., saturation current densities, sheet resistances, and carrier lifetimes) one at a time to ideal values. The efficiency gap to the ultimate limit of 29% is thereby fully explained in terms of both individual improvements and their respective synergistic effects. This approach allows comparing loss structures of different types of solar cells, for example, passivated emitter and rear cell and interdigitated back-contacted cells.

Organisationseinheit(en)

Institut für Festkörperphysik

Externe Organisation(en)

Institut für Solarenergieforschung GmbH (ISFH)
Australian National University

Typ

Artikel

Journal

Progress in Photovoltaics: Research and Applications

Band

24

Seiten

1475-1486

Anzahl der Seiten

12

ISSN

1062-7995

Publikationsdatum

14.11.2016

Publikationsstatus

Veröffentlicht

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.2696 (Zugang: Geschlossen)