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Csem Centre Suisse D'electronique Et De Microtechnique Sa - Recherche Et Développement

Csem Centre Suisse D'electronique Et De Microtechnique Sa-Recherche Et Dévelopment

Bernard Wenger

Raphaël Pugin

Emmanuel Scolan

Richard Henry Friend

Henry James Snaith

Rolf Steiger

Myoung Hoon Song

Dinesh Kabra

An optical sensor () for detecting a chemical species includes a substrate (), a mesoporous matrix () disposed on the substrate, and a microporous matrix () disposed within the mesoporous matrix. The microporous matrix () includes an indicator dye () dispersed therein, the indicator dye () exhibiting changes in its optical properties in response to the presence of the chemical species. This arrangement significantly increases the amount of dye present, while allowing the medium to be analyzed greater access through the porous structure, thereby increasing the performance of the sensor.

Optical sensor for detecting a chemical species

The assembly is made up of: a) a support including a mesoporous coating whose pores have an average diameter dimensioned so as to enable molecules from the family of cyanines to penetrate them, and b) a layer of molecules from the family of cyanines and organized into J-aggregates within the pores of the coating. The assembly moreover includes Quantum Dots located within the same pores as those containing the J-aggregates, the Quantum Dots maintaining J-aggregates structure. A method for producing such an assembly is also described.

Assembly comprising J-aggregates

A light emissive or photovoltaic device comprising: a cathode structure for injecting electrons, the cathode structure having one or more constituent regions; an anode structure for injecting holes, the anode structure having one or more constituent regions; and an organic light emissive component located between the anode structure and the cathode structure; the refractive indices and the thicknesses of the or each constituent region of the cathode and anode structures and of the light emissive component being such that the emission or absorption spectrum of the device is substantially angularly dependent.

Electro-optic diode devices

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Chaumont, Switzerland

Bernard Wenger