Germanium-on-Nothing is proposed as a lift-off method to fabricate thin and lower-cost
germanium templates for multijunction solar cells. This contribution presents how such foils …

New massive markets for space multijunction solar cells are being discussed globally. For
such an explosive increase in demand to materialize, a more sustainable and affordable Ge …

Germanium is listed as a critical raw material, and for environmental and economic
sustainability reasons, strategies for lower consumption must be implemented. A promising …

Germanium, a critical raw material, is used as a template for III-V epitaxial growth and as a
bottom cell in multi-junction solar cells. To reduce the amount of germanium used, a …

Specific power is an important metric for solar arrays in the aerospace market. For High
Altitude Pseudo Satellites (HAPS), solar cells specific powers above 1500 W/kg are …

The fundamental efficiency limit for state of the art triple-junction photovoltaic devices is
being approached. By allowing integration of non-lattice-matched materials in monolithic …

We report on the molecular beam epitaxy (MBE) growth and device characteristics of Ge
solar cells. Integrating a Ge bottom cell beneath a lattice-matched triple junction stack grown …

Solar cells manufactured on top of Ge substrates suffer from inherent drawbacks that hinder
or limit their potential. The most deleterious ones are heavy weight, high bulk recombination …

We demonstrate Ge junctions grown by molecular beam epitaxy (MBE) for lattice-matched,
four-junction solar cells. Integrating a Ge bottom cell beneath a 1.9 eV InGaP/1.4 eV Ga (In) …

Multijunction solar cells with four junctions are expected to be the next-generation
technology for both space and concentrator photovoltaic applications. Most commercial …