EU PVSEC Programme Online
EU PVSEC 2020, 7 - 11 September 2020
Presentation: 3AO.7.2 Silicon-Based Monolithic Triple-Junction Solar Cells with Conversion Efficiency >34%
Type: Oral
Date: Monday, 7th September 2020
13:30 - 15:00
Author(s): R. Müller, P. Schygulla, D. Lackner, O. Höhn, H. Hauser, A. Richter, A. Fell, B. Bläsi, F. Predan, J. Benick, M. Hermle, F. Dimroth, S.W. Glunz
Presenter / Speaker: R. Müller, Fraunhofer ISE, Freiburg, Germany
Event: Conference Conference
Session: 3AO.7 High Efficiency Tandem Solar Cells
Type(s) of Access:  Conference Registration
Topic: 3. 5 Tandems
Keywords: III-V Semiconductor, Multijunction Solar Cell, Tandem, High Efficiency, Silicon
Summary / Abstract: Triple-junction solar cells with top cells made from III-V compound semiconductors on a silicon bottom cell show conversion efficiencies beyond the theoretical limit of single-junction devices, so this is one of the promising technologies for terrestrial photovoltaics. In this work, a III-V//Si tandem device with 34.5% efficiency is presented and further developments are discussed. A detailed investigation of the silicon bottom cell revealed, that with optimum wafer resistivity (~1 Ω cm) and low-temperature passivation of the cell perimeter, the perimeter losses can be reduced to ~0.2%abs. This corresponds to an efficiency gain of up to 0.8%abs for the current devices.