Alternating-Current and Direct-Current Responses of Light-Emitting Devices Based on Decacyclene Langmuir-Blodgett Films

✍ Scribed by Das, S. ;Chowdhury, A. ;Pal, A.J.

• Book ID: 101381997
• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 137 KB
• Volume: 185
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/1521-396x(200106)185:2<383::aid-pssa383>3.0.co;2-d

✦ Synopsis

Light-emitting devices have been fabricated with Langmuir-Blodgett films of decacyclene. The devices have been operated under both direct-current (dc) and alternating-current (ac) modes. Frequency response of luminance of such devices under ac voltage has been studied, and moderately high-frequency electroluminescence has been observed from these devices. Light output characteristics, charge injection, and operation mechanism under the two modes have been compared and found to be different. Fowler-Nordheim tunneling mechanism has been found to be applicable in the dc case, and space-charge-assisted electron injection lowered the tunneling barrier ac modes. The transient characteristics of luminance have been studied which supported the role of space charges in device operation.