[17a-A24-1~6] Organic and ionic thermoelectric materials and devices

9:40 AM - 10:10 AM JST(12:40 AM - 1:10 AM UTC)

[17a-A24-3] Thermoelectric Properties of n-Type Organometallic Semiconductors

〇Michihisa Murata¹ (1.Osaka Inst. Tech.)

Keywords:

organic semiconductor,organometallic semiconductor,thermoelectric material

p-Type and n-type organic and organometallic semiconducting materials are particularly suitable for thermoelectric materials. One promising example of n-type organometallic semiconductors is π-conjugated nickel-ethenetetrathiolate (NiETT), which exhibits high air-stability and n-type thermoelectric behavior. We envisioned that the new design of π-conjugated ligands in nickel complexes should have a positive impact on the conductivity and the thermoelectric properties. In order to increase the accessible variety of this class of complexes, we have developed a versatile method for the synthesis of a variety of π-conjugated Ni complexes and examined their performance. Even though they are insoluble in virtually all common organic solvents, we found that the conductivity of the resulting films can be markedly improved by the choice of the π-conjugated core. The results on the design and synthesis of air-stable n-type materials should contribute to the generation of advanced materials with potential applications in flexible thermoelectric generators.