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Thermoelectricity in metal-organic perovskites: recycling waste energy heat as electricity

Project description

Metal-organic perovskites for efficient thermoelectricity

Thermoelectric materials can directly convert heat into electrical energy and vice versa. Performant thermoelectric devices could be used to recover waste heat in manufacturing, heavy transportation and cogeneration to reduce energy demand and greenhouse gas footprint. Tin selenide (SnSe) is the most advanced material for next-generation thermoelectrics, due to its high thermoelectric performance and intrinsic layered structure. However, its large scale production is highly expensive. The EU-funded THERMOH project will seek to find efficient thermoelectrics in the class of metal-organic single and double halide perovskites, which are intensely studied due to their photovoltaic efficiency and good electrical properties. They can be produced at low costs at scale, while their lattice vibrations are very anharmonic and tunable, allowing planning low thermal conductivity.

Objective

Thermoelectric materials convert thermal and electrical energy, and performant thermoelectric devices could be used to recover waste heat in manufacturing, cogeneration, and heavy transportation - reducing both energy requirements and greenhouse gases' footprint.
Solid-state cooldown would also change refrigeration technologies, in both efficiency and maintenance. Broadly speaking, a materials' breakthrough in thermoelectrics would have an impact on energy efficiency similar to nitride LEDs for lightning technologies.

Optimal thermoelectrics need to balance the contrasting requirements of good electrical conductivity and low thermal conductivity; nowadays the best bulk thermoelectric approaching the desired efficiency is SnSe. However, large-scale production is too expensive, and applications remain limited to niche markets.

The goal of this project is to find efficient thermoelectrics in the class of metal-organic single and double halide perovskites.
These are intensely studied for their photovoltaic efficiency, thanks also to their good electrical properties; they can be manufactured inexpensively at scale; and their lattice vibrations are very anharmonic and tunable, allowing to engineer low thermal conductivity.
Since the overall number of possible compounds is above 500, there is wide chemical tunability of their properties. However, due to both theoretical and experimental difficulties, thermoelectric efficiency has been investigated only in very few compounds. Thanks to the unique capabilities I have developed during my PhD to study from first-principles materials with very large anharmonic distortions, I will investigate the full chemical space of these perovskites in the quest for the most efficient thermoelectric. Success in the project would bring major advantages to the industrial and economic EU ecosystem, but will also cement my leadership in characterizing and designing electrical and thermal properties of far from equilibrium materials.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)

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Call for proposal

(opens in new window) H2020-MSCA-IF-2020

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Coordinator

ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE
Net EU contribution
€ 191 149,44
Address
BATIMENT CE 3316 STATION 1
1015 Lausanne
Switzerland
Region
Schweiz/Suisse/Svizzera Région lémanique Vaud
Activity type
Higher or Secondary Education Establishments
Links
Total cost
€ 191 149,44