Abstract
A tunnel junction has been developed with an application to multijunction solar cells grown on GaSb and analyzed using a combination of electrical device measurements and modeling. The device employs an InAs quantum well embedded in a GaSb p/n junction, exploiting the high tunnel probability at the broken-gap interface between p-type GaSb and n-type InAs and having a minimal impact on the transparency of the device. The concept is extended to wider bandgap heterointerfaces using Al0.2Ga0.8Sb, achieving a differential resistance of 4.08×10−4 Ω cm2.
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