High-voltage solid-state transducers and associated systems and methods

A multi-junction solid state transducer (SST) device comprising:

• a plurality of transducer structures electrically connected in series between a first terminal and a second terminal, each transducer structure including:
• a first semiconductor material,
• a second semiconductor material,
• an active region between the first and second semiconductor materials,
• a first contact structure electrically coupled to the first semiconductor material at a surface opposite the active region,
• a dielectric material adjacent the first contact structure opposite the first semiconductor material, and
• a second contact structure electrically coupled to the second semiconductor material through an opening extending through the first contact structure and the first semiconductor material, the second contact structure electrically isolated from the first contact structure and from the first semiconductor material by the dielectric material,
• wherein each of the plurality of transducer structures is separated from an adjacent transducer structure of the plurality by a corresponding channel extending completely through the first semiconductor material, the active region, and the second semiconductor material and exposing the corresponding first contact structure and the second contact structure of the adjacent transducer structure, and wherein the corresponding first contact structure is electrically and physically coupled to the second contact structure of the adjacent transducer structure by an electrically conductive material disposed in the channel.