Sökning: onr:"swepub:oai:DiVA.org:liu-124495" >
Frequency-dependent...
Frequency-dependent photothermal measurement of transverse thermal diffusivity of organic semiconductors
-
- Brill, J. W. (författare)
- University of Kentucky, KY 40506 USA
-
- Shahi, Maryam (författare)
- University of Kentucky, KY 40506 USA
-
- Payne, Marcia M. (författare)
- University of Kentucky, KY 40506 USA
-
visa fler...
-
- Edberg, Jesper (författare)
- Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten
-
- Yao, Y. (författare)
- University of Kentucky, KY 40506 USA
-
- Crispin, Xavier (författare)
- Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten
-
- Anthony, J. E. (författare)
- University of Kentucky, KY 40506 USA
-
visa färre...
-
(creator_code:org_t)
- AMER INST PHYSICS, 2015
- 2015
- Engelska.
-
Ingår i: Journal of Applied Physics. - : AMER INST PHYSICS. - 0021-8979 .- 1089-7550. ; 118:23, s. 235501-
- Relaterad länk:
-
https://liu.diva-por... (primary) (Raw object)
-
visa fler...
-
http://arxiv.org/pdf...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- We have used a photothermal technique, in which chopped light heats the front surface of a small (similar to 1 mm(2)) sample and the chopping frequency dependence of thermal radiation from the back surface is measured with a liquid-nitrogen-cooled infrared detector. In our system, the sample is placed directly in front of the detector within its dewar. Because the detector is also sensitive to some of the incident light, which leaks around or through the sample, measurements are made for the detector signal that is in quadrature with the chopped light. Results are presented for layered crystals of semiconducting 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-pn) and for papers of cellulose nanofibrils coated with semiconducting poly(3,4-ethylene-dioxythiophene): poly (styrene-sulfonate) (NFC-PEDOT). For NFC-PEDOT, we have found that the transverse diffusivity, smaller than the in-plane value, varies inversely with thickness, suggesting that texturing of the papers varies with thickness. For TIPS-pn, we have found that the interlayer diffusivity is an order of magnitude larger than the in-plane value, consistent with previous estimates, suggesting that low-frequency optical phonons, presumably associated with librations in the TIPS side groups, carry most of the heat. (C) 2015 AIP Publishing LLC.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas