Dr. Xiaoying QIN (X.Y. Qin), a senior professor of Institute of Solid State Physics (ISSP) and deputy director of fifth laboratory of ISSP , Chinese Academy of Science (CAS).The current researches mainly involve thermoelectric materials and energy conversion and energy storage technology.
Thermoelectric (TE) materials have captured extensive attention because of their potential use in direct thermal-to-electrical energy conversion and solid-state refrigeration. The performance of thermoelectric materials can be quantified by a dimensionless figure of merit ZT. Currently, ZT value is too low to be used in a large scale. Hence, it is a great challenge how to raise their ZT value. In addition to enhancing phonon blocking by nanostructuring and nanocompositing, we try, for example, to design material systems with special interface potentials to intensify energy-dependent scattering (energy filtering) to elevating thermopower so as to raise their power factor and ZT value. Besides, we try, for instance, to introduce in the hosts special dopants that not only improve carrier concentration and inhibit lattice thermal conductivity but also causes resonant distortion of electronic density of state (DOS) to enhance thermopower so as to raise their power factor and ZT value. In summary, through improvements and designs of microstructural and electronic structures of the host materials we make great efforts to allow ZT of traditional thermoelectric material systems to achieve larger and larger values.
Postdoctoral and graduate student positions are available in the lab. Students and postdoctors with strong backgrounds in solid state physics and material sciences are very welcome, especially those with direct experiences in researches in thermoelectric materials are highly preferred.