ZnO semiconductor films with periodic 3D nanocave patterns were fabricated by the thermal nanoimprinting technology, which is promising for photodetectors with enhanced light harvesting capability. The Au nanoparticles were further introduced into the ZnO films, which boosts the UV response of ZnO films and extends the photodetection to visible regions. The best UV photoresponse was detected on the 3D nanocave ZnO-Au hybrid films, attributing to the light trapping mechanism of 3D periodic structures and the driving force of the Schottky barrier at the ZnO/Au interface, while the high visible photoresponse of ZnO-Au hybrid films mainly results from the hot electron generation and injection process over the Schottky junctions mediated by Au surface plasmon resonances. The work provides a cost-effective pathway to develop large-scale periodic 3D nanopatterned thin film photodetectors and is promising for the future deployment of high performance optoelectronic devices.
This paper presents a novel current-biased voltage-programmed pixel circuit with low temperature polycrystalline silicon thin film transistors (LTPS-TFT) for active-matrix organic light-emitting diode (AMOLED) displays. The proposed 3T1C pixel circuit features a voltage data line to program pixel, and a fixed current source to compensate for non-idealities. In addition, the aging problem of the OLED could also be alleviated by the AC driving method. The simulation results indicate that the driving current has a deviation of less than 3% for ²0.5 V threshold voltage variation. Besides, it is also demonstrated that the high driving speed can be realized by increasing the bias current.
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