GaAs/AlGaAs potential well barrier diodes: Novel diode for detector and mixer applications. Issue 10 (19th July 2017)

• Record Type: Journal Article
• Authors: Akura, Mise; Dunn, Geoffrey; Sexton, James; Missous, Mohamed
• Is Part Of: Physica status solidi. Volume 214:Issue 10(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-07-19
• Subjects: asymmetry -- drift‐diffusion model -- ideality factor -- potential barrier -- zero‐bias detection; Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.201700290
• Languages: English
• ISSNs: 1862-6300

Abstract

Abstract : Heterostructure potential well barrier (PWB) diodes in GaAs/AlGaAs system operating in a similar way to Planar Doped Barrier (PDB) diodes, though exploiting a potential well to trap charge, rather than a fixed doping spike have recently been realized and reported in the literature. This paper analyses the complex operation of these devices and determines the sensitivity of the current–voltage ( I–V ) characteristics to various design parameters. The PWB diode displays a significant temperature sensitivity, opposite in nature to PDB temperature dependence, and this suggests the possibility of temperature stabilised hybrid designs. The active bias dependence nature of charge within the well is found to have a significant effect on the device and impacts the ideality factor, which is more bias dependent than other comparable devices such as PDBs. However, the same mechanism offers the prospect of improvement in the current asymmetry and this effect can be greatly improved upon by changing the design and shape of the potential well.