N-type organic thermoelectrics: demonstration of ZT > 0.3

Jian Liu, Bas van der Zee, Riccardo Alessandri, Selim Sami, Jingjin Dong, Mohamad I. Nugraha, Alex J. Barker, Sylvia Rousseva, Li Qiu, Xinkai Qiu, Nathalie Klasen, Ryan C. Chiechi, Derya Baran, Mario Caironi, Thomas D. Anthopoulos, Giuseppe Portale, Remco W. A. Havenith, Siewert J. Marrink, Jan C. Hummelen, L. Jan Anton Koster

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


The ‘phonon-glass electron-crystal’ concept has triggered most of the progress that has been achieved in inorganic thermoelectrics in the past two decades. Organic thermoelectric materials, unlike their inorganic counterparts, exhibit molecular diversity, flexible mechanical properties and easy fabrication, and are mostly ‘phonon glasses’. However, the thermoelectric performances of these organic materials are largely limited by low molecular order and they are therefore far from being ‘electron crystals’. Here, we report a molecularly n-doped fullerene derivative with meticulous design of the side chain that approaches an organic ‘PGEC’ thermoelectric material. This thermoelectric material exhibits an excellent electrical conductivity of >10 S cm−1 and an ultralow thermal conductivity of
Original languageEnglish (US)
JournalNature Communications
Issue number1
StatePublished - Nov 10 2020


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