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Type: 
Conference
Description: 
Photovoltaic solar cells (SCs) based on dense arrays of III-V nanowires are believed to possess huge potentials for further improvement of their solar power conversion efficiency. A strategy to achieve this goal requires the exploitation of light wave-guiding mechanism and novel physical concepts. The former mechanism is demonstrated for GaAs- AlGaAs core-shell NWs: large enhancement (up to 200´ that of homogeneous – only core – nanowires) of the GaAs near band-edge absorption have been experimentally estimated and ascribed to a wave-guiding of incident light by the surrounding AlGaAs shell. Optimization of such absorption enhancement requires careful design and control of the AlGaAs shell thickness during nanowire self-assembly. Adoption of an intermediate-band gap semiconductor (IBGS) as the SC active material allows to combine the multiband absorption functionality of IBGS with advantages …
Publisher: 
SPIE
Publication date: 
2 Oct 2024
Authors: 

Paola Prete, Nico Lovergine

Biblio References: 
Volume: 13114 Pages: 18-22
Origin: 
Low-Dimensional Materials and Devices 2024