Photoinduced p- to n-type Switching in Thermoelectric Polymer-Carbon Nanotube Composites

Bernhard Dörling, Jason D. Ryan, John D. Craddock, Andrea Sorrentino, Ahmed El Basaty, Andrés Gomez, Miquel Garriga, Eva Pereiro, John E. Anthony, Matthew C. Weisenberger, Alejandro R. Goñi, Christian Müller, Mariano Campoy-Quiles; Adv. Mater; DOI: 10.1002/adma.201505521

UV-induced switching from p- to n-type character is demonstrated during deposition of carbon nanotube-conjugated polymer composites. This opens the possibility to photopattern n-type regions within an otherwise p-type film, which has a potential for complementary circuitry or, as shown here, thermoelectric generators made from a single solution.