Highly efficient modulation doping: A path toward superior organic thermoelectric devices

Research output: Contribution to journalResearch articleContributedpeer-review



We investigate the charge and thermoelectric transport in modulation-doped large-area rubrene thin-film crystals with different crystal phases. We show that modulation doping allows achieving superior doping efficiencies even for high doping densities, when conventional bulk doping runs into the reserve regime. Modulation-doped orthorhombic rubrene achieves much improved thermoelectric power factors, exceeding 20 μW m−1 K−2 at 80°C. Theoretical studies give insight into the energy landscape of the heterostructures and its influence on qualitative trends of the Seebeck coefficient. Our results show that modulation doping together with high-mobility crystalline organic semiconductor films is a previosly unexplored strategy for achieving high-performance organic thermoelectrics.


Original languageEnglish
Article numbereabl9264
Number of pages8
JournalScience advances
Issue number13
Publication statusPublished - 1 Apr 2022

External IDs

PubMed 35353575
unpaywall 10.1126/sciadv.abl9264
Mendeley bcd6ad5e-b255-3b04-9937-823e0706203a
ORCID /0000-0002-9773-6676/work/142247050


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