Temperature dependence of thermophotonic energy transfer in intracavity structures

Alberto Casado, Ivan Radevici, Toufik Sadi, Jani Oksanen

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

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Electroluminescent cooling (ELC) of light-emitting diodes (LEDs) at high powers is yet to be demonstrated. Earlier studies of photoluminescent cooling (PLC) suggested that temperature strongly affects the light emission efficiency and therefore it is useful to explore the temperature range below room temperature (RT) where ELC might be easier to observe. With that purpose in mind, we electrically characterised three different sized (0.2, 0.5 and 1 mm diameter) double-diode structure (DDS) devices, consisting of a coupled LED and photodiode (PD), at temperatures ranging from 100 K to 325 K to investigate how the temperature affects the efficiency of the structures in practice. We found that, for the studied devices, the coupling quantum efficiency (CQE) as well as the overall efficiency indeed increase when temperature decreases and reach their highest values at temperatures below room temperature.

Original languageEnglish
Title of host publicationPhotonic Heat Engines
Subtitle of host publicationScience and Applications
EditorsDenis V. Seletskiy, Richard I. Epstein, Mansoor Sheik-Bahae
ISBN (Electronic)9781510625143
Publication statusPublished - 1 Jan 2019
MoE publication typeA4 Article in a conference publication
EventPhotonic Heat Engines: Science and Applications - San Francisco, United States
Duration: 3 Feb 20194 Feb 2019

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferencePhotonic Heat Engines: Science and Applications
Country/TerritoryUnited States
CitySan Francisco


  • Electroluminescent cooling
  • Heat engines
  • III-V semiconductors
  • Light-emitting diodes
  • Temperature dependence
  • Thermophotonic Cooling


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