Theoretical analysis on light-extraction efficiency of organic light-emitting diodes using FDTD and mode-expansion methods

✍ Scribed by Alongkarn Chutinan; Kuniaki Ishihara; Takashi Asano; Masayuki Fujita; Susumu Noda

• Book ID: 104075775
• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 253 KB
• Volume: 6
• Category: Article
• ISSN: 1566-1199
• DOI: 10.1016/j.orgel.2004.12.001

✦ Synopsis

We report a theoretical analysis on light-extraction efficiency of the organic light-emitting diodes. We utilize both a numerical method such as the finite-difference time-domain method and an analytic method such as the mode-expansion method. The results of both methods are compared to confirm the accuracy of the results. It is found that even though the refractive index contrast between the indium-tin-oxide (ITO) anode and the glass substrate is as small as 0.5, more than 40% of emitted light power is trapped in the ITO layer.