Thermoelectric Properties of Solution‐Processed n‐Doped Ladder‐Type Conducting Polymers

Wang, Suhao; Sun, Hengda; Ail, Ujwala; Vagin, Mikhail; Persson, Per; Andreasen, Jens Wenzel; Thiel, Walter; Berggren, Magnus; Crispin, Xavier; Fazzi, Daniele; Fabiano, Simone

doi:10.1002/adma.201701535

Cited by 31 publications

(64 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A further increase in dopant concentration is then detrimental for the electrical conductivity. A similar dependence of σ on dopant concentration was observed for PNDIT2 reference films, in good agreement with literature, 38,[64][65][66] where the maximum σ of (1.2±0.2) . 10 -3 Scm -1 , achieved at 15% w/w, is five times lower than for 2S-trans-PNDIT2.…”

Section: Optical and Electrical Propertiessupporting

confidence: 91%

Drastic Improvement of Air Stability in an n-Type Doped Naphthalene-Diimide Polymer by Thionation

Nava

Shin

Massetti

et al. 2018

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Organic thermoelectrics are attractive for the fabrication of flexible and cost-effective thermoelectric generators (TEGs) for waste heat recovery, in particular by exploiting large-area printing of polymer conductors. Efficient TEGs require both p- and n-type conductors: so far, the air instability of polymer n-type conductors, which typically lose orders of magnitude in electrical conductivity (σ) even for short exposure time to air, has impeded processing under ambient conditions. Here we tackle this problem in a relevant class of electron transporting, naphthalene-diimide copolymers, by substituting the imide oxygen with sulfur. n-type doping of the thionated copolymer gives rise to a higher σ with respect to the non-thionated one, and most importantly, owing to a reduced energy level of the lowest-unoccupied molecular orbital, σ is substantially stable over 16 h of air exposure. This result highlights the effectiveness of chemical tuning to improve air stability of n-type solution-processable polymer conductors and shows a path toward ambient large-area manufacturing of efficient polymer TEGs.

show abstract

Section: Optical and Electrical Propertiessupporting

confidence: 91%

Drastic Improvement of Air Stability in an n-Type Doped Naphthalene-Diimide Polymer by Thionation

Nava

Shin

Massetti

et al. 2018

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…f Thermoelectric performance comparison of TAM-doped FBDPPV with literature results (refs. 11,24,[26][27][28][29][30][53][54][55][56][57][58] ). Error bars indicate the SD of ten experimental replicates.…”

Section: Resultsmentioning

confidence: 99%

A thermally activated and highly miscible dopant for n-type organic thermoelectrics

et al. 2020

View full text Add to dashboard Cite

N-doping plays an irreplaceable role in controlling the electron concentration of organic semiconductors thus to improve performance of organic semiconductor devices. However, compared with many mature p-doping methods, n-doping of organic semiconductor is still of challenges. In particular, dopant stability/processability, counterion-semiconductor immiscibility and doping induced microstructure non-uniformity have restricted the application of ndoping in high-performance devices. Here, we report a computer-assisted screening approach to rationally design of a triaminomethane-type dopant, which exhibit extremely high stability and strong hydride donating property due to its thermally activated doping mechanism. This triaminomethane derivative shows excellent counterion-semiconductor miscibility (counter cations stay with the polymer side chains), high doping efficiency and uniformity. By using triaminomethane, we realize a record n-type conductivity of up to 21 S cm −1 and power factors as high as 51 μW m −1 K −2 even in films with thicknesses over 10 μm, and we demonstrate the first reported all-polymer thermoelectric generator.

show abstract

“…The superior PF values achieved in the monoclinic Ag 2 Se 1-x S x samples would promise high power output when they are fabricated into TE devices. In addition, most n-type organic TE materials are unstable in the air because their electron affinity is too low to stabilize the n-type dopants [2,50]. In contrast, the present ductile monoclinic Ag 2 Se 1-x S x samples are inert to oxygen or water; thus, they can realize good service stability in real application.…”

Section: Researchmentioning

confidence: 98%

Crystalline Structure-Dependent Mechanical and Thermoelectric Performance in Ag2Se1‐xSx System

et al. 2020

View full text Add to dashboard Cite

Self-powered wearable electronics require thermoelectric materials simultaneously with a high dimensionless figure of merit (zT) and good flexibility to convert the heat discharged by the human body into electricity. Ag2(S,Se)-based semiconducting materials can well satisfy these requirements, and thus, they are attracting great attention in thermoelectric society recently. Ag2(S,Se) crystalizes in an orthorhombic structure or monoclinic structure, depending on the detailed S/Se atomic ratio, but the relationship between its crystalline structure and mechanical/thermoelectric performance is still unclear to date. In this study, a series of Ag2Se1‐xSx (x=0, 0.1, 0.2, 0.3, 0.4, and 0.45) samples were prepared and their mechanical and thermoelectric performance dependence on the crystalline structure was systematically investigated. x=0.3 in the Ag2Se1‐xSx system was found to be the transition boundary between orthorhombic and monoclinic structures. Mechanical property measurement shows that the orthorhombic Ag2Se1‐xSx samples are brittle while the monoclinic Ag2Se1‐xSx samples are ductile and flexible. In addition, the orthorhombic Ag2Se1‐xSx samples show better electrical transport performance and higher zT than the monoclinic samples under a comparable carrier concentration, most likely due to their weaker electron-phonon interactions. This study sheds light on the further development of flexible inorganic TE materials.

show abstract

Thermoelectric Properties of Solution‐Processed n‐Doped Ladder‐Type Conducting Polymers

Cited by 31 publications

References 0 publications

Drastic Improvement of Air Stability in an n-Type Doped Naphthalene-Diimide Polymer by Thionation

Drastic Improvement of Air Stability in an n-Type Doped Naphthalene-Diimide Polymer by Thionation

A thermally activated and highly miscible dopant for n-type organic thermoelectrics

Crystalline Structure-Dependent Mechanical and Thermoelectric Performance in Ag2Se1‐xSx System

Contact Info

Product

Resources

About