Optimization of the photorecording system through the application of a coating based on nanostructured phosphors

• Дата: 2022
• Автор: Беляк, Є. В.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: Інститут проблем реєстрації інформації НАН України 2022
• Теми: система фотореєстрації; фотоелектричний перетворювач; фоточутливість; колірний баланс; піразолінові барвники; нано-структурований композит; квантовий вихід фотолюмінесценції; photorecording system; photovoltaic converter; photosensitivity; color balance; pyrazoline dyes; nanostructured composite; quantum yield of photoluminescence
• Онлайн доступ: http://drsp.ipri.kiev.ua/article/view/262657
• Назва журналу: Data Recording, Storage & Processing

Current approaches used in the implementation and optimization of modern photorecording systems are considered. An analysis of the factors leading to a decrease in photosensitivity and a violation of the color balance of the photomatrix was carried out. It is proposed to reduce the difference between the visible radiation spectrum registered by the system and the absorption spectrum of the photovoltaic converters of the photomatrix elements by applying a photoluminescent coating. A basic approach has been defined that allows to increase the photosensitivity and color balance of the photomatrix by applying a layer of luminophore with a high quantum yield of photoluminescence to the surface of the photocells, as well as a fixed value of the Stokes shift and absorption peak. The results of experimental studies on the synthesis of the appropriate class of coating luminophores that can be used within the framework of this technique are presented. The luminophores of the coating were based on organic pyrazoline dyes, polymethyl-methacrylate and polystyrene impurities, which allows for a controlled change in absorption and photoluminescence spectra. Nanostructuring of the luminophores was carried out by inclusion the dye molecules into the submicron pores of the zeolite and laser annealing. It is shown that the proposed scheme can be expanded when switching from triads to tetrads of photocells and including such color channels which covers the entire visible spectrum and serves as an additional way to increase the photosensitivity of the photomatrix. The conditions for optimizing the photomatrix by modifying the color scheme have been determined. As a result of the study, a methodology was developed for determining the optimal parameters of the photoluminescent coating layer of photomatrix elements based on the target indicators of photosensitivity and color balance.