High-performance n-type Ta₄SiTe₄/polyvinylidene fluoride (PVDF)/graphdiyne organic–inorganic flexible thermoelectric composites

Abstract

Beyond carbon nanotubes and graphene, we conduct a proof-of-principle study by using semiconducting graphdiyne (GDY) to fabricate high-performance n-type organic–inorganic flexible thermoelectric composites.

Flexible solar and thermal energy conversion devices: Organic photovoltaics (OPVs), organic thermoelectric generators (OTEGs) and hybrid PV-TEG systems

“…In this case, as shown in Fig. 22b, Chen et al developed n-type Ta 4 SiTe 4 /PVDF/GDY composite films where the homogenous distributed GDY inside the composites led to enhancement of electrical conductivity by bridging between the Ta 4 SiTe 4 whiskers [378]. The optimized composite film had a maximum ZT value of 0.2 at 300 K.…”

“…[377]), Ta 4 SiTe 4 /GDY/PVDF (Reprint permission from Ref. [378])). (c) Development roadmap for OTEGs and their applications over time (OTEG (Reprint permission from Ref.…”

High-Power-Density Wearable Thermoelectric Generators for Human Body Heat Harvesting

“…In general, there are two typical ways to achieve wearability of thermoelectric (TE) devices: intrinsically flexible TE materials, ,− and rigid TE materials with flexible substrates and stretchable interconnects. − Organic-based flexible TE materials generally have much lower TE performance compared with inorganic ones, − leading to very low output power density for organic-based w-TEGs. Thus, the use of rigid inorganic TE materials helps to achieve higher output power density.…”

Ag2Se/nylon self-supporting composite films for wearable photo-thermoelectric generators with high output characteristics

“…Although the energy conversion efficiency of bulk Ag 2 Se is already at the leading position in the field of thermoelectricity ( ZT value close to 1), 16,24,25 the flexibility of TE materials is also necessary to provide the required comfort (wearable electronics) and to better cover heat sources for higher energy conversion efficiency. 26–30…”

“…Although the energy conversion efficiency of bulk Ag 2 Se is already at the leading position in the eld of thermoelectricity (ZT value close to 1), 16,24,25 the exibility of TE materials is also necessary to provide the required comfort (wearable electronics) and to better cover heat sources for higher energy conversion efficiency. [26][27][28][29][30] Flexible TE lms are currently divided into two main categories: non-self-supporting and self-supporting lms, of which the former have exible substrates at the top or bottom to confer exibility to the composites. 31 It is worth noting that there are clear separation interfaces in these materials and the substrates are not considered in the calculation of TE properties, so the substrates and TE layers are not considered as a whole.…”