| Summary: | 碩士 === 國立成功大學 === 光電科學與工程研究所 === 94 === Thin film transistors (TFTs) based on conjugated organic materials, both small molecules and polymers have emerged recently due to their potential in low-cost, low-temperature fabrication and, the possibility of producing flexible devices. Several groups have proposed or reported successful integration of such devices with Organic light-emitting diodes. The OTFTs exhibiting photoresponsivity, which could act as light sensors, photoswitches or optoelectronic memory elements, open new avenues of research into promising device applications.
In our study, we investigated the effect of illumination for characteristics of Pentacene-OTFTs when they integrated with OLEDs. And we found that the Pentacene-OTFTs can be operated as light sensors and optoelectronic memory devices.
In first part, we observed the characteristics of Pentacene-OTFFs were affected by illumination. And we observed full recovery of these devices after the illumination was removed at room temperature.
In second part, we investigated the dependence between characteristics of Pentacene-OTFTs and illumination intensity. We found that the performance of Pentacene-OTFTs decreased with increasing illumination intensity.
In third part, we investigated the characteristics of Pentacene-OTFTs under illumination for a long time. We observed the performance of Pentacene-OTFTs decreased with increasing illumination time.
In final part, we found that the Pentacene-OTFTs are sensitive to light signal, but they can not be operated as a fast photodetectors because of their slow response time. But, maybe they can be used as optoelectronic memory elements.
In conclusion, the Pentacene-OTFTs were sensitive to light signal, and the performance decreased significantly with illumination.
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