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In-cavity thermophotonic cooling

Total Cost €


EC-Contrib. €






Project "iTPX" data sheet

The following table provides information about the project.


Organization address
address: OTAKAARI 1
city: ESPOO
postcode: 2150

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Finland [FI]
 Total cost 1˙981˙250 €
 EC max contribution 1˙981˙250 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2014-STG
 Funding Scheme ERC-STG
 Starting year 2015
 Duration (year-month-day) from 2015-10-01   to  2020-09-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    AALTO KORKEAKOULUSAATIO SR FI (ESPOO) coordinator 1˙981˙250.00


 Project objective

Thermophotonic (TPX) coolers and generators based on electroluminescent (EL) cooling have the potential to enable a high efficiency replacement for thermoelectric devices. Highly optimized TPX devices can even outperform modern compressor based household refrigerators and heat pumps, enabling a significant reduction in the global energy consumption of cooling and heating. While the EL cooling phenomenon is theoretically well understood, it was only very recently demonstrated for the first time under very small power conditions. Enabling high power EL cooling, however, will require a breakthrough in reducing the losses present in conventional light emitting diodes (LED).

iTPX aims to enable this breakthrough by developing an alternative approach to enhance the efficiency of light emission. The approach is based on enclosing the emitter-absorber pair used in TPX in a single semiconductor structure forming an optical cavity. This enhances the light emission rate by an order of magnitude and provides a substantial increase in the efficiency as well as several other technical and fundamental benefits. The main goal of iTPX is to demonstrate high power EL cooling for the first time and to provide quantitative insight on the limitations and possibilities of the cavity-based approach. Recent studies have shown extremely high – over 99 % – internal and external quantum efficiencies of light emission from optically pumped semiconductor structures. This suggests that the material quality of common III-V compound semiconductors is perfectly sufficient for EL cooling if similarly performing electrically injected structures can be fabricated in the single cavity configuration.


year authors and title journal last update
List of publications.
2018 Toufik Sadi, Pyry Kivisaari, Jonna Tiira, Ivan Radevici, Tuomas Haggren, Jani Oksanen
Electroluminescent cooling in intracavity light emitters: modeling and experiments
published pages: , ISSN: 0306-8919, DOI: 10.1007/s11082-017-1285-z
Optical and Quantum Electronics 50/1 2019-09-27
2018 Ivan Radevici, Jonna Tiira, Toufik Sadi, Jani Oksanen
Influence of photo-generated carriers on current spreading in double diode structures for electroluminescent cooling
published pages: 05LT01, ISSN: 0268-1242, DOI: 10.1088/1361-6641/aab6c3
Semiconductor Science and Technology 33/5 2019-09-27
2017 Mikko Partanen, Teppo Häyrynen, Jani Oksanen
Interference-exact radiative transfer equation
published pages: , ISSN: 2045-2322, DOI: 10.1038/s41598-017-11753-5
Scientific Reports 7/1 2019-09-27
2017 Pyry Kivisaari, Iurii Kim, Sami Suihkonen, Jani Oksanen
Elimination of resistive losses in large-area LEDs by new diffusion-driven devices
published pages: 101240Z, ISSN: , DOI: 10.1117/12.2251108
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXI 2019-09-27
2017 Jonna Tiira, Ivan Radevici, Tuomas Haggren, Teemu Hakkarainen, Pyry Kivisaari, Jari Lyytikäinen, Arto Aho, Antti Tukiainen, Mircea Guina, Jani Oksanen
Intracavity double diode structures with GaInP barrier layers for thermophotonic cooling
published pages: 1012109, ISSN: , DOI: 10.1117/12.2250843
Optical and Electronic Cooling of Solids II 2019-09-27
2016 Anders Olsson, Jonna Tiira, Mikko Partanen, Teemu Hakkarainen, Eero Koivusalo, Antti Tukiainen, Mircea Guina, Jani Oksanen
Optical Energy Transfer and Loss Mechanisms in Coupled Intracavity Light Emitters
published pages: 3567-3573, ISSN: 0018-9383, DOI: 10.1109/TED.2016.2590461
IEEE Transactions on Electron Devices 63/9 2019-09-27
2017 Pyry Kivisaari, Iurii Kim, Sami Suihkonen, Jani Oksanen
Elimination of Lateral Resistance and Current Crowding in Large-Area LEDs by Composition Grading and Diffusion-Driven Charge Transport
published pages: 1700103, ISSN: 2199-160X, DOI: 10.1002/aelm.201700103
Advanced Electronic Materials 2019-09-27
2017 Ivan Radevici, Jonna Tiira, Jani Oksanen
Lock-in thermography approach for imaging the efficiency of light emitters and optical coolers
published pages: 101210Q, ISSN: , DOI: 10.1117/12.2249978
Optical and Electronic Cooling of Solids II 2019-09-27

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