POLYLOL SOLUTION SYNTHESIS OF ORIENTED In₂Se₃ NANOSHEETS AND THEIR APPLICATION ON HIGH-PERFORMANCE INORGANIC-ORGANIC HYBRID PHOTODETECTOR

Single-phase beta-In2Se3 nanosheets were successfully synthesized by hot injection method using triethylene glycol (TEG)-based solution. It was found that the adding amounts of reactant played a key role in determining size and thickness of the In2Se3 nanosheets. The In2Se3 nanosheets were (0001) orientation and had the lateral size of similar to 500 nm and plate thickness of similar to 6 nm with 0.4 mmol indium precursor. A new inorganic-organic hybrid film photodetector using the oriented In2Se3 nanosheets and photoelectronic Poly(3-hexylthiophene) (P3HT) as blending partners was fabricated on SiO2/Si wafer, exhibiting a much better photoswitching performance with a low off-current of similar to 40 pA at a bias voltage of 1.0 V and on/off ratio of 250 illuminated at 532 nm under incident light intensity of 40 mW/cm(2).