Tin selenide (SnSe) has attracted much attention in the
field of
thermoelectrics since the discovery of the record figure of merit
(zT) of 2.6 ± 0.3. While there have been many
publications onp-type SnSe, to manufacture efficient
SnSe thermoelectric generators, ann-type is also
required. Publications onn-type SnSe, however, are
limited. This paper reports a pseudo-3D-printing technique to fabricate
bulkn-type SnSe elements, by utilizing Bi as a dopant.
Various Bi doping levels are investigated and characterized over a
wide range of temperatures and through multiple thermal cycles. Stablen-type SnSe elements are then combined with printedp-type SnSe elements to fabricate a fully printed alternatingn-andp-type thermoelectric generator,
which is shown to produce 145 μW at 774 K.