In this paper, a photo-modulated transistor based on the thin-film transistor structure was fabricated on the flexible substrate by spin-coating and magnetron sputtering. A novel hybrid material that composed of CdSe quantum dots and reduced graphene oxide (RGO) fragment-decorated ZnO nanowires was synthesized to overcome the narrow optical sensitive waveband and enhance the photo-responsivity. Due to the enrichment of the interface and heterostructure by RGO fragments being utilized, the photo-responsivity of the transistor was improved to 2000 A W−1 and the photo-sensitive wavelength was extended from ultraviolet to visible. In addition, a positive back-gate voltage was employed to reduce the Schottky barrier width of RGO fragments and ZnO nanowires. As a result, the amount of carriers was increased by 10 folds via the modulation of back-gate voltage. With these inherent properties, such as integrated circuit capability and wide optical sensitive waveband, the transistor will manifest great potential in the future applications in photodetectors.

A bioinspired structure flexible supercapacitor device with excellent electrochemical capacitance directly through a replica technique using natural resources has been developed.

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Solution processed-metal oxide as an interlayer is introduced between the organic layer and the electrode for improving the performance of the low-cost inverted polymer solar cells. Our investigations indicate that cuprous oxide thin film as an electron blocking layer can modulate the schottky barrier at organic/electrode interface and form an ohmic contact. Moreover, we also report the ridge structure zinc oxide as an electron selective layer in the inverted polymer solar cells. The cuprous oxide can function as a great hole transportation layer and the ridge structure zinc oxide can increase interfacial area for electron collection. The power conversion efficiency is improved from 3.34% to 4.02% by the introduction of the metal oxide interlayer. Compared to the vacuum technique, the fabrication of the metal oxide via solution process is simple and effective. The solution-based approach makes it attractive for application to mass production and potentially printed organic electronics.

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