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

2021 ◽  
Author(s):  
Sanyin Qu ◽  
Chen Ming ◽  
Pengfei Qiu ◽  
Kunqi Xu ◽  
Qing Xu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Polyvinylidene Fluoride ◽  
High Performance ◽  
The Past ◽  
P Type ◽  
Flexible Thermoelectric

In the past decade, the development of high-performance p-type flexible organic-inorganic thermoelectric composites based on nanocarbons (e.g. carbon nanotubes and graphene) has achieved unprecedented success, but the progress in n-type...

scholarly journals Carbon Nanotube-Based Organic Thermoelectric Materials for Energy Harvesting

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1196 ◽  
Author(s):  
Xiaodong Wang ◽  
Hong Wang ◽  
Bing Liu
Keyword(s):  
High Performance ◽  
Organic Materials ◽  
Low Cost ◽  
The Past ◽  
Current Trends ◽  
P Type ◽  
Flexible Thermoelectric ◽  
Representative Samples ◽  
Theory And Experiments ◽  
Remarkable Progress

Carbon nanotubes (CNTs) have attracted much attention in developing high-performance, low-cost, flexible thermoelectric (TE) materials because of their great electrical and mechanical properties. Theory predicts that one-dimensional semiconductors have natural advantages in TE fields. During the past few decades, remarkable progress has been achieved in both theory and experiments. What is more important is that CNTs have shown desirable features for either n-type or p-type TE properties through specific strategies. Up to now, CNT‒polymer hybrids have held the record for TE performance in organic materials, which means they can potentially be used in high-performance TE applications and flexible electronic devices. In this review, we intend to focus on the intrinsic TE properties of both n-type and p-type CNTs and effective TE enhanced strategies. Furthermore, the current trends for developing CNT-based and CNT‒polymer-based high TE performance organic materials are discussed, followed by an overview of the relevant electronic structure‒TE property relationship. Finally, models for evaluating the TE properties are provided and a few representative samples of CNT‒polymer composites with high TE performance are highlighted.

Double doping approach for unusually stable and large n-type thermoelectric voltage from p-type multi-walled carbon nanotube mats

2020 ◽  
Vol 8 (26) ◽  
pp. 13095-13105 ◽  
Author(s):  
Qiujun Hu ◽  
Zhongxu Lu ◽  
Yizhuo Wang ◽  
Jing Wang ◽  
Hong Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Seebeck Coefficients ◽  
Thermoelectric Voltage ◽  
Large N ◽  
Multi Walled Carbon Nanotube ◽  
Multi Walled Carbon Nanotubes ◽  
P Type ◽  
Flexible Thermoelectric ◽  
Walled Carbon Nanotubes

Multi-walled carbon nanotubes (MWCNTs) have shown low n-type Seebeck coefficients (−10 μV K−1), which are not good enough to prepare high performance low-cost MWCNT based mechanically flexible thermoelectric devices.

Phototransistors Based on A Lightly Doped P3HT

MRS Advances ◽  
2020 ◽  
Vol 5 (37-38) ◽  
pp. 1975-1982
Author(s):  
Thomas H. Debesay ◽  
Sam-Shajing Sun
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Acid Methyl Ester ◽  
Extensive Study ◽  
The Past ◽  
Polymeric Semiconductor ◽  
Donor Acceptor ◽  
Low Toxicity ◽  
Improved Performance ◽  
P Type

AbstractOrganic/Polymeric Semiconductor (OSC) based devices have been under extensive study for the past three decades due to their intrinsic potential advantages such as lightweight, mechanical flexibility, biocompatibility, low toxicity, abundant material availability, low cost of processing, etc. A phototransistor incorporates the properties and functions of a transistor and photodetector. In this study, a phototransistor based on a donor/acceptor (D/A) pair (photo-doping) was studied and demonstrated. Unlike in organic photovoltaics (OPV) where 1:1 proportion by mass of the donor:acceptor is utilized to make up the active layer, that ratio appears to be too high for phototransistor applications. According to literature, this 1:1 concentration leads to low overall device performance, lack of I-V curve saturation (kink effect), and bipolar behavior. By altering fabrication techniques and doping concentrations, we were able to demonstrate a donor/acceptor based phototransistor with p-type characteristics with improved performance. In this work, we fabricated a high-performance OFET based on a very small amount of Phenyl-C71-butyric acid methyl ester (PCBM) doped into a Poly(3-hexylthiophene) (P3HT) host. With this work, a greater understanding behind the optimization of D/A based phototransistors is advanced.

scholarly journals Response of Palladium and Carbon Nanotube Composite Films to Hydrogen Gas and Behavior of Conductive Carriers

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4568
Author(s):  
Muxuan Zou ◽  
Yoshinori Aono ◽  
Shuhei Inoue ◽  
Yukihiko Matsumura
Keyword(s):  
Carbon Nanotubes ◽  
Palladium Nanoparticles ◽  
High Performance ◽  
Hydrogen Adsorption ◽  
Composite Films ◽  
Dissociative Adsorption ◽  
Seebeck Effect ◽  
Hydrogen Gas ◽  
P Type ◽  
And Behavior

To develop a high-performance hydrogen gas sensor, we fabricated a composite film made of carbon nanotubes (CNTs) and palladium nanoparticles. Carbon nanotubes were spin-coated onto a glass substrate, and subsequently, palladium nanoparticles were sputtered onto this film. The response to hydrogen gas was measured during two seasons (summer and winter) using a vacuum chamber by introducing a hydrogen/argon gas mixture. There was a clear difference in the sensor response despite the temperature difference between summer and winter. In addition, since a clean chamber was used, fewer water molecules acted as a dopant, and the behavior of the CNT changed from p-type to n-type because of the dissociative adsorption of hydrogen. This phenomenon was confirmed as the Seebeck effect. Finally, the work functions of Pd, PdHx, and CNT were calculated by first-principle calculations. As predicted by previous studies, a decrease in work function due to hydrogen adsorption was confirmed; however, the electron transfer to CNT was not appropriate from the perspective of charge neutrality and was found to be localized at the Pd/CNT interface. It seems that the Seebeck effect causes the concentration of conductive carriers to change.

Thermoelectric all-carbon heterostructures for a flexible thermoelectric generator

2021 ◽  
Vol 5 (1) ◽  
pp. 267-273
Author(s):  
Hyeonseok Hwang ◽  
Kwang-Suk Jang
Keyword(s):  
Carbon Nanotubes ◽  
High Performance ◽  
Thermoelectric Generator ◽  
Thermoelectric Performance ◽  
Carbon Nanoparticle ◽  
Energy Filtering ◽  
Filtering Effect ◽  
Flexible Thermoelectric

High-performance thermoelectric all-carbon heterostructures are investigated. The carbon nanoparticle barrier between carbon nanotubes can enhance the thermoelectric performance due to the energy filtering effect.

scholarly journals Flexible thermoelectric films formed using integrated nanocomposites with single-wall carbon nanotubes and Bi2Te3 nanoplates via solvothermal synthesis

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Hayato Yabuki ◽  
Susumu Yonezawa ◽  
Rikuo Eguchi ◽  
Masayuki Takashiri
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Solvothermal Synthesis ◽  
High Performance ◽  
Nanocomposite Films ◽  
Single Wall Carbon Nanotubes ◽  
High Electrical Conductivity ◽  
Single Wall Carbon ◽  
Maximum Power Factor ◽  
Flexible Thermoelectric

Abstract Single-wall carbon nanotubes (SWCNTs) and Bi2Te3 nanoplates are very promising thermoelectric materials for energy harvesting. When these two materials are combined, the resulting nanocomposites exhibit high thermoelectric performance and excellent flexibility. However, simple mixing of these materials is not effective in realizing high performance. Therefore, we fabricated integrated nanocomposites by adding SWCNTs during solvothermal synthesis for the crystallization of Bi2Te3 nanoplates and prepared flexible integrated nanocomposite films by drop-casting. The integrated nanocomposite films exhibited high electrical conductivity and an n-type Seebeck coefficient owing to the low contact resistance between the nanoplates and SWCNTs. The maximum power factor was 1.38 μW/(cm K2), which was 23 times higher than that of a simple nanocomposite film formed by mixing SWCNTs during drop-casting, but excluding solvothermal synthesis. Moreover, the integrated nanocomposite films maintained their thermoelectric properties through 500 bending cycles.

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