| 초록 |
A small-molecule semiconducting material, TIPS-pentacene, and isotatic (i-) polymer (methyl methacrylate) (PMMA), has been blended to provide reproducible reference TFTs. We prepared a hysteresis-free device with batch-by-batch uniformity. We introduce "vertical flowing" technique of blend solution which is distinguishable from the previous works. This method provde us with elongated TIPS-pentacene crystal and allow us to fabricate highly-performing TFT on glass substrate, which exhibit mobility of 0.34 ± 0.03 cm2 / V s operating at -15 V. As another part of presentation, we address stability issue of our TFT by means of bias stress and photo-electric method. The reference TFT show irreversible behavior to negative bias stress, while reversible behavior was also shown under positive voltage stress. Photo-electric characteristic under monochromatic photon energy (ranging from 1.2 to 3.4 eV) will also be discussed and quantitatively in terms of threshold voltage shift. |
