اثر پراکندگی حامل وابسته تحرک میزبان بر روی ضریب توان حرارتی کامپوزیت های پلیمری
|کد مقاله||سال انتشار||مقاله انگلیسی||ترجمه فارسی||تعداد کلمات|
|58165||2016||10 صفحه PDF||سفارش دهید||6081 کلمه|
Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Nano Energy, Volume 19, January 2016, Pages 128–137
The interfacial carrier scattering was thought to be ineffective in enhancing thermoelectric (TE) properties of polymer hybrids and there was also a lack of fundamental understanding of carrier scattering at polymer/polymer interfaces. Here we unravel the mechanism behind the role of polymer/polymer interfacial scattering on the TE properties through integration of computation and experiments. We discover that the effect of interfacial scattering at polymer/polymer interfaces on TE properties of polymer hybrids is strongly dependent on the carrier mobility of host polymers besides interfacial barriers. Only when the host carrier mobility is above a threshold, the effect of interfacial scattering on TE enhancement can be significant. Simulation suggests that the host mobility threshold is ~1 cm2 V−1 s−1 for PEDOT-based polymers. The polymer hybrid system of poly(3,4-ethylenedioxythiophene) (PEDOT) nanowires/PEDOT was successfully employed to verify the theoretical results. These findings offer groundbreaking knowledge on polymer/polymer interfacial carrier-transport and will advance the design and fabrication of high-efficiency organic thermoelectric materials.