3results about How to "High optical contrast" patented technology

This invention relates to conjugated polymers containing dibenzofuran (thiophene) and carbazole units, their preparation methods, and applications. To address the problems of poor optical contrast, slow response time, and poor cycling stability of existing conjugated polymers as electrochromic materials, this invention uses 2,8-dibromodibenzofuran or 2,8-dibromodibenzothiophene as reactants, reacting them with 9-hexyl-3,6-bis(4,4,5,5-tetramethyl-1,3,2-dioxoborane-2-yl)-carbazole or 9-phenyl-3,6-bis(4,4,5,5-tetramethyl-1,3,2-dioxoborane-2-yl)-carbazole to form conjugated polymers with dibenzofuran (thiophene) and carbazole units in the main chain. The conjugated polymers of this invention exhibit excellent electrochromic properties, including excellent cycling stability, fast switching time, high optical contrast, and low voltage start-up. This invention is expected to be applied in fields such as smart windows, rearview mirrors, military camouflage, and electronic tags in the construction and automotive industries.

The present application adopts inkjet printing and non-catalyst chemical nickel plating method to deposit metal nickel on transparent nylon net and silk net, realizes the preparation of low-cost large-scale flexible transparent conductive substrate with controllable morphology, and is suitable for large-scale mass production. The present application is very beneficial to the integration of planar microelectronic devices. Based on the technology, a flexible transparent Zn net electrode is prepared by electroplating Zn on the Ni-P pattern nylon net. The ZECD window with zinc net anode and prussian blue (PB) cathode shows significant electrochromic performance, including fast switching time, high optical contrast and excellent cycle performance. These ZECDs are also very suitable for solar charging intelligent windows, which can further solve the problem of solar intermittency. These findings open up new opportunities for energy storage and conversion transparent devices.

This invention discloses a Fe3O4@SiO2 / polyurethane composite photonic crystal sensor, its preparation method, and its applications, belonging to the field of photonic crystal sensor technology. This invention achieves spatial modulation of the C6 fluorescence signal and enhancement of the local photonic field by spectrally matching the reflection band of the structured photonic crystal with the C6 emission band. This results in significant fluorescence quenching response even under extremely low PA concentrations, overcoming the limitation of low sensitivity in traditional fluorescence detection. Compared with traditional HPLC or conventional fluorescence spectroscopy methods, the photonic crystal enhancement system of this invention can improve PA detection sensitivity by approximately 3-4 orders of magnitude, while exhibiting good reproducibility and environmental stability.