Conductive cooling in white organic light emitting diode for enhanced efficiency and life time

6533b7d0fe1ef96bd125b742

RESEARCH PRODUCT

Conductive cooling in white organic light emitting diode for enhanced efficiency and life time

Ritu Srivastava Arunandan Kumar Lalat Indu Giri Suneet Tuli Priyanka Tyagi Priyanka Tyagi

subject

Materials science Physics and Astronomy (miscellaneous)business.industry chemistry.chemical_element Epoxy Copper chemistry Molybdenum Aluminium visual_art Heat transfer OLED visual_art.visual_art_medium Optoelectronics Mica business Electrical conductor

description

We demonstrate white organic light emitting diodes with enhanced efficiency (26.8 lm/W) and life time (∼11 000 h) by improved heat dissipation through encapsulation composed of a metal (Cu, Mo, and Al) and mica sheet joined using thermally conducting epoxy. Finite element simulation is used to find effectiveness of these encapsulations for heat transfer. Device temperature is reduced by about 50% with the encapsulation. This, consequently, has improved efficiency and life time by about 30% and 60%, respectively, with respect to glass encapsulation. Conductive cooling of device is suggested as the possible cause for this enhancement.

year	journal	country	edition	language
2015-01-05	Applied Physics Letters

https://doi.org/10.1063/1.4903800

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