Wang Shi-rong

Improved Performance of Fluorinated Copper Phthalocyanine Thin Film Transistors Using Para-hexaphenyl as the Inducing Layer

We demonstrate n-type organic thin film transistors (OTFTs) employing copper hexadecafluorophthalocyanine (CuPcF16) as the active layer and para-hexaphenyl (p-6p) as the inducing layer. Compared with the CuPcF16-based OTFTs without the p-6p inducing layer, the performance of the CuPcF16/p-6p OTFTs is greatly improved. The charge carrier field-effect mobility μ, on-off current ratio Ion/Ioff and threshold voltage VT of the CuPcF16/p-6p OTFTs are 0.07 cm2/Vs, 1.61 × 105 and 6.28 V, respectively, approaching the level of a single crystal device. The improved performance is attributed to the introduction of p-6p to form a highly oriented and continuous film of CuPcF16 with the molecular π-π stack direction parallel to the substrate.

An investigation of complex modification of Benzidine Yellow G

Benzidine Yellow G (C.I. Pigment Yellow 12) was successively modified through mixed coupling with sulfo derivatives of acetoacetanilide and fatty amines. The hydrocarbon chain of the fatty amine enclosed the polar sulfo groups, and properties such as flowability, wettability, and dispersibility were greatly improved after the pigment was treated with stearylamine.

An investigation of organic dye-coloured nacreous pigments

The preparation of some coloured mica-titanium dioxide nacreous pigments has been investigated. The results showed that some mordant and direct dyes were the preferred precursor materials. The effects of reaction conditions, such as temperature, pH and reaction time, on the quality of the coloured nacreous pigments were also studied.