Academic Journal
Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscale
| العنوان: | Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscale |
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| المؤلفون: | Gueye M. N., Vercouter A., Jouclas R., Guerin D., Lemaur V., Schweicher G., Lenfant S., Antidormi A., Geerts Y., Melis C., Cornil J., Vuillaume D. |
| المساهمون: | Gueye, M. N., Vercouter, A., Jouclas, R., Guerin, D., Lemaur, V., Schweicher, G., Lenfant, S., Antidormi, A., Geerts, Y., Melis, C., Cornil, J., Vuillaume, D. |
| سنة النشر: | 2021 |
| المجموعة: | Università degli Studi di Cagliari: UNICA IRIS |
| الوصف: | We study by scanning thermal microscopy the nanoscale thermal conductance of films (40-400 nm thick) of [1]benzothieno[3,2-b][1]benzothiophene (BTBT) and 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT-C8). We demonstrate that the out-of-plane thermal conductivity is significant along the interlayer direction, larger for BTBT (0.63 ± 0.12 W m-1 K-1) compared to C8-BTBT-C8 (0.25 ± 0.13 W m-1 K-1). These results are supported by molecular dynamics calculations (approach to equilibrium molecular dynamics method) performed on the corresponding molecular crystals. The calculations point to significant thermal conductivity (3D-like) values along the 3 crystalline directions, with anisotropy factors between the crystalline directions below 1.8 for BTBT and below 2.8 for C8-BTBT-C8, in deep contrast with the charge transport properties featuring a two-dimensional character for these materials. In agreement with the experiments, the calculations yield larger values in BTBT compared to C8-BTBT-C8 (0.6-1.3 W m-1 K-1versus 0.3-0.7 W m-1 K-1, respectively). The weak thickness dependence of the nanoscale thermal resistance is in agreement with a simple analytical model. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/pmid/33565562; info:eu-repo/semantics/altIdentifier/wos/WOS:000619559900035; volume:13; issue:6; firstpage:3800; lastpage:3807; numberofpages:8; journal:NANOSCALE; https://hdl.handle.net/11584/325853; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85101258563 |
| DOI: | 10.1039/d0nr08619c |
| الاتاحة: | https://hdl.handle.net/11584/325853 https://doi.org/10.1039/d0nr08619c |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.ED2CDA1D |
| قاعدة البيانات: | BASE |
| DOI: | 10.1039/d0nr08619c |
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