Increased power factors of organic–inorganic nanocomposite thermoelectric materials and the role of energy filtering

Liang, Zhiming; Boland, Mathias J.; Butrouna, K.; Strachan, Douglas R.; Graham, Kenneth R.

doi:10.1039/c7ta02307c

Cited by 111 publications

(91 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar improvement was recorded by Choi et al for tellurium nanowire‐single wall carbon nanotube composite . Recently, Liang et al have attempted to validate this trend, and found that small (0.08 eV) and large (0.88 eV) energy barriers between the P3HT and tellurium play a significant role in charge carrier transport . While, in other report the EF effect was not noticed qualitatively…”

Section: Applications Of the Energy Filtering Effect To Different Clasupporting

confidence: 76%

Energy Filtering of Charge Carriers: Current Trends, Challenges, and Prospects for Thermoelectric Materials

Gayner

Amouyal

2019

Adv Funct Materials

355

231

View full text Add to dashboard Cite

Exhaustive attempts are made in recent decades to improve the performance of thermoelectric materials that are utilized for waste heat-to-electricity conversion. Energy filtering of charge carriers is directed toward enhancing the material thermopower. This paper focuses on the theoretical concepts, experimental evidence, and the authors' view of energy filtering in the context of thermoelectric materials. Recent studies suggest that not all materials experience this effect with the same intensity. Although this effect theoretically demonstrates improvement of the thermopower, applying it poses certain constraints, which demands further research. Predicated on data documented in literature, the unusual dependence of the thermopower and conductivity upon charge carrier concentrations can be altered through the energy filtering approach. Upon surmounting the physical constraints discussed in this article, thermoelectric materials research may gain a new direction to enhance the power factor and thermoelectric figure of merit.

show abstract

Section: Applications Of the Energy Filtering Effect To Different Clasupporting

confidence: 76%

Energy Filtering of Charge Carriers: Current Trends, Challenges, and Prospects for Thermoelectric Materials

Gayner

Amouyal

2019

Adv Funct Materials

355

231

View full text Add to dashboard Cite

show abstract

“…In general, thermoelectric materials can be divided into two types: organic thermoelectric materials and inorganic thermoelectric materials. It has been several decades since the development of inorganic thermoelectrics, and several inorganic thermoelectric materials have been applied to new batteries, refrigeration devices, microsensors, and so forth . However, inorganic thermoelectric materials have several drawbacks, such as high cost, toxicity, complicated manufacture process, and rare resources, which hinder their wide applications .…”

Section: Introductionmentioning

confidence: 99%

Enhanced figure of merit of poly(9,9‐di‐n‐octylfluorene‐alt‐benzothiadiazole) and SWCNT thermoelectric composites by doping with FeCl₃

Zhou

Pan

Liang

et al. 2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

Poly(9, generally has a large Seebeck coefficient, and single-walled carbon nanotubes (SWCNTs) have high electrical conductivity. In this work, we prepared F8BT/SWCNT composites to combine the good Seebeck coefficient of the polymer and the excellent electrical conductivity of SWCNTs to achieve enhanced thermoelectric properties. For the composite materials, the maximum power factor of 1 μW mK −2 was achieved when the SWCNT content was 60%, with the maximum ZT value of 4.6 × 10 −4 . After ferric chloride was employed as the oxidative dopant for the composites, the electrical conductivity of the composites improved significantly. The maximum value of power factor (1.7 μW mK −2 ) was achieved when the SWCNT content was 60%, and the ZT value of 7.1 × 10 −4 was about 1.5 times as high as that of the composites with undoped F8BT.

show abstract

“…The first type is carbon materials, such as carbon nanotubes [21], and graphene sheets [22]. The second one is inorganic materials, including tellurium nanowires [23], SnSe [24], and Bi 2 Te 3 nanowires [25].…”

mentioning

confidence: 99%

The Molecular Weight Dependence of Thermoelectric Properties of Poly (3-Hexylthiophene)

et al. 2020

View full text Add to dashboard Cite

Organic materials have been found to be promising candidates for low-temperature thermoelectric applications. In particular, poly (3-hexylthiophene) (P3HT) has been attracting great interest due to its desirable intrinsic properties, such as excellent solution processability, chemical and thermal stability, and high field-effect mobility. However, its poor electrical conductivity has limited its application as a thermoelectric material. It is therefore important to improve the electrical conductivity of P3HT layers. In this work, we studied how molecular weight (MW) influences the thermoelectric properties of P3HT films. The films were doped with lithium bis(trifluoromethane sulfonyl) imide salt (LiTFSI) and 4-tert butylpyridine (TBP). Various P3HT layers with different MWs ranging from 21 to 94 kDa were investigated. UV–Vis spectroscopy and atomic force microscopy (AFM) analysis were performed to investigate the morphology and structure features of thin films with different MWs. The electrical conductivity initially increased when the MW increased and then decreased at the highest MW, whereas the Seebeck coefficient had a trend of reducing as the MW grew. The maximum thermoelectric power factor (1.87 μW/mK2) was obtained for MW of 77 kDa at 333 K. At this temperature, the electrical conductivity and Seebeck coefficient of this MW were 65.5 S/m and 169 μV/K, respectively.

show abstract

Increased power factors of organic–inorganic nanocomposite thermoelectric materials and the role of energy filtering

Abstract: Enhancements in the performance of organic–inorganic nanocomposite thermoelectrics may be obtained with both small and large energy barriers at the organic–inorganic interfaces.

Cited by 111 publications

References 62 publications

Energy Filtering of Charge Carriers: Current Trends, Challenges, and Prospects for Thermoelectric Materials

Energy Filtering of Charge Carriers: Current Trends, Challenges, and Prospects for Thermoelectric Materials

Enhanced figure of merit of poly(9,9‐di‐n‐octylfluorene‐alt‐benzothiadiazole) and SWCNT thermoelectric composites by doping with FeCl₃

The Molecular Weight Dependence of Thermoelectric Properties of Poly (3-Hexylthiophene)

Contact Info

Product

Resources

About

Increased power factors of organic–inorganic nanocomposite thermoelectric materials and the role of energy filtering

Abstract: Enhancements in the performance of organic–inorganic nanocomposite thermoelectrics may be obtained with both small and large energy barriers at the organic–inorganic interfaces.

Cited by 111 publications

References 62 publications

Energy Filtering of Charge Carriers: Current Trends, Challenges, and Prospects for Thermoelectric Materials

Energy Filtering of Charge Carriers: Current Trends, Challenges, and Prospects for Thermoelectric Materials

Enhanced figure of merit of poly(9,9‐di‐n‐octylfluorene‐alt‐benzothiadiazole) and SWCNT thermoelectric composites by doping with FeCl3

The Molecular Weight Dependence of Thermoelectric Properties of Poly (3-Hexylthiophene)

Contact Info

Product

Resources

About

Enhanced figure of merit of poly(9,9‐di‐n‐octylfluorene‐alt‐benzothiadiazole) and SWCNT thermoelectric composites by doping with FeCl₃