@article{Hrachowina2022, 
author = {Lukas Hrachowina and Enrique Barrigón and Magnus T. Borgström},
title = {Development and characterization of photovoltaic tandem-junction nanowires using electron-beam-induced current measurements},
year = {2022},
journal = {Nano Research},
volume = {15},
number = {9},
pages = {8510-8515},
keywords = {III–V nanowire, nanowire solar cell, tandem-junction, Esaki tunnel diode, electron-beam induced current (EBIC)},
url = {https://www.sciopen.com/article/10.1007/s12274-022-4469-1},
doi = {10.1007/s12274-022-4469-1},
abstract = {Nanowires have many interesting properties that are of advantage for solar cells, such as the epitaxial combination of lattice-mismatched materials without plastic deformation. This could be utilized for the synthesis of axial tandem-junction nanowire solar cells with high efficiency at low material cost. Electron-beam-induced current measurements have been used to optimize the performance of single-junction nanowire solar cells. Here, we use electron-beam-induced current measurements to break the barrier to photovoltaic tandem-junction nanowires. In particular, we identify and subsequently prevent the occurrence of a parasitic junction when combining an InP n–i–p junction with a tunnel diode. Furthermore, we demonstrate how to use optical and electrical biases to individually measure the electron-beam-induced current of both sub-cells of photovoltaic tandem-junction nanowires. We show that with an applied voltage in forward direction, all junctions can be analyzed simultaneously. The development of this characterization technique enables further optimization of tandem-junction nanowire solar cells.}
}