Fused terthiophene end-capped with barbituric acid as non-fullerene n-type small molecule for an organic photo-detector.

In this work, a new n-type small molecule consisting of a fused thiophene backbone and barbituric acid as the electron-withdrawing group is reported. For green-selective organic photodiodes, when combined with p-type subphthalocyanine, the external quantum efficiency reached 64% at -3 V, owing to suitable absorption properties, efficient charge separation and relatively good transport.

Green-Light-Selective Organic Photodiodes with High Detectivity for CMOS Color Image Sensors.

Stacked structures employing wavelength-selective organic photodiodes (OPDs) have been studied as promising alternatives to the conventional Si-based image sensors because of their color constancy. Herein, novel donor (D)-π-acceptor (A) molecules are designed, synthesized, and characterized as green-light-selective absorbers for application in organic-on-Si hybrid complementary metal-oxide-semiconductor (CMOS) color image sensors. The p-type molecules, combined with two fused-type heterocyclic donors and an electron-accepting unit, exhibit cyanine-like properties that are characterized by intense and sharp absorption.

Narrow-Band Organic Photodiodes for High-Resolution Imaging.

There are growing opportunities and demands for image sensors that produce higher-resolution images, even in low-light conditions. Increasing the light input areas through 3D architecture within the same pixel size can be an effective solution to address this issue. Organic photodiodes (OPDs) that possess wavelength selectivity can allow for advancements in this regard.

Organic-on-silicon complementary metal-oxide-semiconductor colour image sensors.

Complementary metal-oxide-semiconductor (CMOS) colour image sensors are representative examples of light-detection devices. To achieve extremely high resolutions, the pixel sizes of the CMOS image sensors must be reduced to less than a micron, which in turn significantly limits the number of photons that can be captured by each pixel using silicon (Si)-based technology (i.e.

A novel photochemical reaction of 2-alkoxynicotinates to cage-type photodimers.

Irradiation of a benzene solution of 2-alkoxynicotinic acid alkyl esters gave cage-type photodimers in good yields, the structure of which was established by X-ray single-crystal analysis. The maximum quantum yield was 8.0 x 10(-)(2) when a 5.