Transient thermal analysis of white organic light-emitting diode for heat-dissipation application

Henglong Yang

doi:10.1117/12.929320

13 September 2012 Transient thermal analysis of white organic light-emitting diode for heat-dissipation application

Henglong Yang

Proceedings Volume 8476, Organic Light Emitting Materials and Devices XVI; 847624 (2012) https://doi.org/10.1117/12.929320
Event: SPIE Organic Photonics + Electronics, 2012, San Diego, California, United States

Abstract

The thermal conductivity of the organic light-emitting material in a white organic light-emitting diode (WOLED) was precisely estimated by solving two-dimensional transient heat transfer equation and fitting experimental data. A WOLED usually operates in relatively high current mode to maintain higher brightness for lighting application. A practical solution for heat dissipation is crucial for properly applying WOLED in lighting application. Thermal conductivity of a material is a critical parameter for developing heat dissipation solution. A typical WOLED consists of several thin organic light-emitting layers with similar thermal characteristics sandwiched by anode and cathode. These organic layers can be regarded as a single organic light-emitting material for simplifying thermal analysis. The thermal characteristic of the organic light-emitting material can be represented by an effective or equivalent thermal conductivity in analytical model. The analytical model of temperature distribution was obtained from solving two-dimensional transient heat transfer equation with simplified bi-layer structure. The effective thermal conductivity of the thin-film organic light-emitting material can be precisely estimated by fitting analytical temperature distribution function to the experimental data. Our preliminary investigation indicates that the thermal conductivity of the organic light-emitting material is estimated between 0.28 and 0.29 w/m°C, similar to well-known organic compounds.

Citation Download Citation

Henglong Yang "Transient thermal analysis of white organic light-emitting diode for heat-dissipation application", Proc. SPIE 8476, Organic Light Emitting Materials and Devices XVI, 847624 (13 September 2012); https://doi.org/10.1117/12.929320

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available