Preliminary characterization of ST2G: Solar thermionic- Thermoelectric generator for concentrating systems

Alessandro Bellucci, Paolo Calvani, Emilia Cappelli, Stefano Orlando, Diletta Sciti, Ronen Yogev, Abraham Kribus, Daniele M. Trucchi*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

24 Scopus citations


An innovative conversion module (CM) for concentrating solar power applications, named ST2G (Solar Thermionic-Thermoelectric Generator), has been developed and fabricated. The new technology is based on a solid-state converter that works at temperatures up to 1000 °C and exploits a double conversion stage: A thermionic stage and a thermoelectric one, connected thermally in series. Potentially, the CM could reach a combined solar energy-to-electrical efficiency larger than 30%, producing also additional thermal energy to be exploited as a co-generation. Different prototypes have been fabricated and the discussion on the technological key-points has been reported, relating them to the physical requirements necessary for an efficient conversion mechanism. The preliminary results obtained at a lab-level are here discussed, indicating low electrical power output, but also how to increase the performance by solving the identified issues.

Original languageEnglish
Title of host publicationNANOFORUM 2014
EditorsMarco Rossi, Luciana Dini, Daniele Passeri, Maria Letizia Terranova
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735413146
StatePublished - 23 Jun 2015
EventNANOFORUM 2014 - Rome, Italy
Duration: 22 Sep 201425 Sep 2014

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


ConferenceNANOFORUM 2014

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