Improved thermoelectric performance of organic thin-film elements utilizing a bilayer structure of pentacene and 2,3,5,6-tetrafluoro-7,7,8,8- tetracyanoquinodimethane (F4 -TCNQ)

Kentaro Harada, Mao Sumino, Chihaya Adachi, Saburo Tanaka, Koji Miyazaki

Research output: Contribution to journalArticlepeer-review

60 Citations (Scopus)

Abstract

We demonstrate an improved thermoelectric performance of small molecular thin films fabricated by thermal deposition of pentacene as a p -type conduction layer. To enhance the performance, a bilayer structure composed of an intrinsic pentacene layer and an acceptor 2,3,5,6-tetrafluoro-7,7,8,8- tetracyanoquinodimethane layer is utilized as the prototype thermoelectric element. With the bilayer structure, the electrical conductivity reaches 0.43 S/cm, exhibiting a positive Seebeck coefficient of about 200 μV/K. We thus obtain a high power factor of 2.0 μW/ mK2 with an optimized layer thickness.

Original languageEnglish
Article number253304
JournalApplied Physics Letters
Volume96
Issue number25
DOIs
Publication statusPublished - Jun 21 2010

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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