Influence of weight ratio of poly(4-vinylphenol) insulator on electronic properties of InGaZnO thin-film transistor

C. J. Chiu, Z. W. Pei, S. P. Chang, S. J. Chang

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Spin-coated organic PVP layers were used as dielectric layers in a-IGZO TFTs. Weight ratios of 20:1, 10:1, and 5:1 for PVP and PMF, a cross-linking agent, were used. The a-IGZO TFTs with the PVP:PMF ratio of 20:1 showed a large hysteresis in the I - V curve and C - V curve, the hysteresis increases with the increase of hydroxyl groups and also deteriorated the gate leakage current. In contrast, the devices with the PVP:PMF ratio of 5:1 dielectric displayed only small hysteresis. According to our experimental results, preventing the possible diffusion of hydroxyl-contained species in polymeric dielectrics is a very important factor in improving the electrical properties of high-performance a-IGZO TFT devices.

Original languageEnglish
Article number698123
JournalJournal of Nanomaterials
Publication statusPublished - 2012 Jul 19


All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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