K S Kang et al 2008 J. Phys. D: Appl. Phys. 41 012003 doi:10.1088/0022-3727/41/1/012003
K S Kang1, H K Lim, K Y Cho, K J Han and Jaehwan Kim
Show affiliationsThe durability and failure cause of a polymer Schottky diode made with PEDOT : PSS-pentacene were investigated. A polymer Schottky diode was fabricated by dissolving pentacene in N-methylpyrrolidone (NMP) and mixing with PEDOT : PSS. Pentacene solution having a maximum concentration of approximately 9.7 mmoles was prepared by simply stirring the solution at room temperature for 36 h. As the pentacene concentration increased, the absorption of the broad UV regime increased dramatically. However, absorption peaks of pentacene at 301 and 260 nm were not observed for the PEDOT : PSS-pentacene. A three-layered polymer Schottky diode was fabricated and its current–voltage (I–V) characteristic was evaluated. The current was reduced by 7% in the first 50 min and then stabilized during biased electrical field sweeps. After 500 and 800 min, catastrophic failure occurred. FESEM images revealed that the electrode damage caused catastrophic failure of the Schottky diode.
85.30.Hi Surface barrier, boundary, and point contact devices
85.30.De Semiconductor-device characterization, design, and modeling
Soft matter, liquids and polymers
Issue 1 (7 January 2008)
Received 16 October 2007, in final form 6 November 2007
Published 12 December 2007
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