Choi, Jaeyoo Lee, Jang Yeol Lee, Sang-Soo Park, Chong Rae Kim, Heesuk 2024-01-20T04:04:08Z 2024-01-20T04:04:08Z 2021-09-05 2016-05-11 1614-6832 https://pubs.kist.re.kr/handle/201004/124067 As commercial interest in flexible power-conversion devices increases, the demand for high-performance alternatives to brittle inorganic thermoelectric (TE) materials is growing. As an alternative, we propose a rationally designed graphene/polymer/inorganic nanocrystal free-standing paper with high TE performance, high flexibility, and mechanical/chemical durability. The ternary hybrid system of the graphene/polymer/inorganic nanocrystal includes two heterojunctions that induce double-carrier filtering, which significantly increases the electrical conductivity without a major decrease in the thermopower. The ternary hybrid shows a power factor of 143 mu W m(-1) K-1 at 300 K, which is one to two orders of magnitude higher than those of single-or binary-component materials. In addition, with five hybrid papers and polyethyleneimine (PEI)-doped single-walled carbon nanotubes (SWCNTs) as the p-type and n-type TE units, respectively, a maximum power density of 650 nW cm(-2) at a temperature difference of 50 K can be obtained. The strategy proposed here can improve the performance of flexible TE materials by introducing more heterojunctions and optimizing carrier transfer at those junctions, and shows great potential for the preparation of flexible or wearable power-conversion devices. English WILEY-V C H VERLAG GMBH CARBON NANOTUBES ENHANCED THERMOPOWER ORGANIC COMPOSITES POLYMER NANOCOMPOSITES FILMS POWER CONDUCTIVITY MORPHOLOGY COMPLEX High-Performance Thermoelectric Paper Based on Double Carrier-Filtering Processes at Nanowire Heterojunctions Article 10.1002/aenm.201502181 1 ADVANCED ENERGY MATERIALS, v.6, no.9 ADVANCED ENERGY MATERIALS 6 9 scie scopus 000379306400006 2-s2.0-84969523015 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Energy & Fuels Materials Science Physics Article CARBON NANOTUBES ENHANCED THERMOPOWER ORGANIC COMPOSITES POLYMER NANOCOMPOSITES FILMS POWER CONDUCTIVITY MORPHOLOGY COMPLEX composite materials flexible electronics heterojunctions nanocomposites thermoelectric properties