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Flexible thermopower generation over broad temperature range by PANI/nanorod hybrid-based p–n couples

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Abstract

Conducting polymer-based flexible thermoelectric films are an attractive prospect in the field of low-grade heat energy conversion. However, the varieties of n-type polymers are much fewer than the p-type ones, which presents a major obstacle for developing high performance thermoelectric generators. Herein, we demonstrate an n-type polyaniline-based hybrid with Bi2S3 nanorods as fillers, showing a Seebeck coefficient of −42 μV K−1 at room temperature, which was realized by precisely controlling the major carrier concentration. Compact and flexible power generator based on solution-processed n-type PANI/Bi2S3 and p-type PANI/Te nanorod hybrid films with 7 couples of p–n legs was assembled. The output performance of the device was characterized over a wide temperature range (from room temperature to 473 K). An equivalent thermopower of 224.4 μV per K per couple was achieved at a temperature difference of 90 K. The device also showed good air stability over a one month period. This study provides an approach for integrating PANI-based p-type and n-type thermoelectric films towards efficient power generation utilizing ambient energy for wearable applications.

Graphical abstract: Flexible thermopower generation over broad temperature range by PANI/nanorod hybrid-based p–n couples

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Publication details

The article was received on 16 Nov 2018, accepted on 12 Dec 2018 and first published on 12 Dec 2018


Article type: Paper
DOI: 10.1039/C8TA11008E
Citation: J. Mater. Chem. A, 2019, Advance Article
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    Flexible thermopower generation over broad temperature range by PANI/nanorod hybrid-based p–n couples

    Y. Wang, G. Liu, M. Sheng, C. Yu and Y. Deng, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C8TA11008E

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