Highly transparent ZnO-based thin-film transistors ͑TFTs͒ are fabricated with optical transmission ͑including substrate͒ of ϳ75% in the visible portion of the electromagnetic spectrum. Current– voltage measurements indicate n-channel, enhancement-mode TFT operation with excellent drain current saturation and a drain current onto off ratio of ϳ10 7.… (More)
Several SPICE models are described for modeling the behavior of organic light-emitting devices OLEDs and their ability to predict DC and AC current-voltage trends is discussed. Circuit conngurations resulting in either bulk-or injection-limited current transport are also demonstrated.
Recently, sputtered metal-oxide-based field effect transistors (FETs) have been demonstrated with higher charge carrier mo-bilities, higher current densities, and faster response performance than amorphous silicon FETs, which are the dominant technology used in display backplanes [1-2]. Furthermore, the optically transparent semiconducting oxide films can… (More)
A disodium phosphonooxymethyl prodrug of the antitumor agent triptolide was prepared from the natural product in three steps (39% yield) and displayed excellent aqueous solubility at pH 7.4 (61 mg/mL) compared to the natural product (17 μg/mL). The estimated shelf life (t90) for hydrolysis of the prodrug at 4 °C and pH 7.4 was found to be two years. In a… (More)