Thin film organic thermoelectric generator based on tetrathiotetracene

Pudsz, Kaspars; Vembris, A.; Rutkis, M.; Woodward, Simon

Abstract

Thin films of p- and n- type organic semiconductors for thermo-electrical (TE) applications are produced by doping of tetrathiotetracene (TTT). To obtain p-type material TTT is doped with iodine during vacuum deposition of thin films or by post-deposition doping using controlled exposure to iodine vapors. Thermal co-deposition in vacuum of TTT and TCNQ is used to prepare n-type thin films. The attained thin films are characterized by measurements of Seebeck coefficient and electrical conductivity. Seebeck coefficient and conductivity could be varied by altering the doping level. P-type TTT:iodide thin films with a power factor of 0.52 ?Wm-1K-2, electrical conductivity of 130 S m-1 and Seebeck coefficient of 63 ?V K-1 and n-type TCNQ:TTT films with power factor of 0.33 ?Wm-1K-2, electrical conductivity of 57 S m-1 and Seebeck coefficient of -75 ?V K-1 are produced. Engineered deposition of both p- and n-type thermoelectric conducting elements on the same substrate is demonstrated. A proof of concept prototype of planar thin film TE generator based on a single p-n couple from the organic materials is built and its power generation characterized.

Citation

Pudsz, K., Vembris, A., Rutkis, M., & Woodward, S. (in press). Thin film organic thermoelectric generator based on tetrathiotetracene. Advanced Electronic Materials, https://doi.org/10.1002/aelm.201600429

• Journal Article Type: Article
• Acceptance Date: Nov 30, 2016
• Online Publication Date: Jan 5, 2017
• Deposit Date: Jan 11, 2017
• Publicly Available Date: Jan 11, 2017
• Journal: Advanced Electronic Materials
• Electronic ISSN: 2199-160X
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• DOI: https://doi.org/10.1002/aelm.201600429
• Keywords: Doping; Organic electronics; Thermoelectrics; Thin films
• Public URL: https://nottingham-repository.worktribe.com/output/841802
• Publisher URL: http://onlinelibrary.wiley.com/doi/10.1002/aelm.201600429/full
• Additional Information: This is the peer reviewed version of the following article: K. Pudzs, A. Vembris, M. Rutkis, S. Woodward, Adv. Electron. Mater. 2017, 1600429, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/aelm.201600429/full This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.