@conference{10902/29277,
year = {2017},
month = {9},
url = {https://hdl.handle.net/10902/29277},
abstract = {Tunnel junctions are essential components of multijunction solar cells. These highly doped p/n junctions provide the electrical interconnect between the subcells that constitute a multijunction solar cell device. The conductivity and the peak tunneling current of tunnel diodes are known to be severely affected by thermal load. This is a general phenomenon observed in tunnel junctions despite the materials used, the dopants employed or the growth technique applied. Despite this generality, the explanations for this thermal degradation tend to be quite material/dopant specific. On the contrary, in this work we apply the amphoteric native defect model to explain this issue. In this context, the degradation can be explained as a consequence of the net loss of free carrier concentration produced by the creation of native compensating defects in the highly doped layers of the tunnel junction. Experiments carried out on n++ GaAs agree well with the model.},
organization = {This work was supported by the Spanish Ministerio de Economía y Competitividad through projects with code
TEC2015-66722-R and projects TEC2014-54260-C3-1-P and by the Comunidad de Madrid through the project
MADRID-PV (S2013/MAE-2780). I. García (RYC-2014-15621) and D. Pastor (RYC-2014-16936) acknowledge
the financial support from the Spanish Programa Estatal de Promoción del Talento y su Empleabilidad through a
Ramón y Cajal grant. Part of this work was performed at the EMAT, National Center for Electron
Microscopy/Molecular Foundry and was supported by the Director, Office of Science, Office of Basic Energy
Sciences, Materials Sciences and Engineering Division, of the U.S. Department of Energy under Contract No. DEAC02-05CH11231. W. Walukiewicz acknowledges funding support from the Singapore National Research
Foundation (NRF) through the Singapore Berkeley Research Initiative for Sustainable Energy (SinBeRISE)
Programme.},
publisher = {American Institute of Physics},
publisher = {AIP Conference Proceedings, 2017, 1881(1), 040005},
publisher = {13th International Conference on Concentrator Photovoltaic Systems (CPV-13), Ottawa, Canada, 2017},
title = {On the thermal degradation of tunnel diodes in multijunction solar cells},
author = {Rey-Stolle Prado, Ignacio and García Vara, Iván and Barrigón Montañés, Enrique and Olea Ariza, Javier and Pastor Pastor, David and Ochoa Gómez, Mario and Barrutia Poncela, Laura and Algora del Valle, Carlos and Walukiewicz, Wladek},
}