Effect of ITO surface state to the aging characteristics of thin film OLED

• Published in: Applied surface science Vol. 244; no. 1; pp. 537 - 540
• Main Authors: Fukushi, Y., Kominami, H., Nakanishi, Y., Hatanaka, Y.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 15.05.2005; Elsevier Science
• Subjects: Aging characteristics; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Electroluminescence; Exact sciences and technology; ITO; Materials science; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Organic light emitting diode; Other luminescence and radiative recombination; Photoluminescence; Physics; Surface cleaning, etching, patterning; Surface treatments; Thin film; 81.65-b (Surface treatments); ITO; Organic light emitting diode; Aging characteristics; 78.60.Fi (Electroluminescence); Thin film; 81.65-b (Surface treatments) Thin film; Inorganic compounds; Ternary compounds; Photoluminescence; Light emitting diodes; Surface treatments; Electroluminescence; Chemical etching; Surface states; Thin films; Tin oxides; Ultraviolet irradiation; Aging; Indium oxides
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2004.10.115

Relationships between surface state of indium tin oxide (ITO) and luminescent properties, and aging characteristics of organic light emitting diodes (OLEDs) were investigated. Polycrystalline ITO surface used as the substrate of the thin film OLED was changed by chemical etching and ultraviolet (UV) irradiation. Initial properties of luminescent characteristics showed no significant difference between different ITO surface states. On the other hand, the device fabricated on UV irradiated ITO showed longer lifetime than that of without UV irradiation. We found that UV irradiation was effective for the aging characteristics of thin film OLED.