UV-responsive CCD image sensors with enhanced inorganic phosphor coatings

Benchmarking the dynamic luminescence properties and UV stability of B18H22-based materials

“…Current UV-imaging technology is limited by its inability to simultaneously observe UV and visible light, mainly due to the opaque phosphors used. 12 With the appropriate setup, 13 our transparent, UV-absorbing films would permit the simultaneous visualization of UV and visible light. As a proof-of-concept to demonstrate the utility of compounds 1–3 , a prototype imaging setup was constructed using a 340 nm LED (Fig.…”

Nanophosphor Coatings: Technology and Applications, Opportunities and Challenges

“…The CTF quantifies the frequency response of an imaging system for a square-wave input instead of the sine wave, which is more convenient for experiments (e.g. with bar charts or rectangular slits, Franks et al, 2003). For the same reason of simpler experimental procedure, the line spread function is sometimes obtained by differentiating an edge trace, i.e.…”

“…Requirements imposed on the encapsulation of nanophosphors and semiconductor quantum dot are very similar, so that the results obtained for the latter should be taken into account for the future work on nanophosphor-converted white LEDs. Furthermore, this knowledge could also be useful for X-Ray or UV-enhanced CCD image sensors, where similar strategies for the deposition of phosphor layers were proposed (Franks et al, 2000;Franks et al, 2003). Properties of the encapsulant are crucial because it may impair the quantum efficiency of the nanophosphor as discussed in Sec.…”

Photochromism and Thermally and Optically Stimulated Luminescences of AlN Ceramic Plate for UV Sensing

“…Another approach is to use a combination of a phosphor plate with a conventional photodetector. (5) The phosphor plate converts UV light to visible light so that a conventional photodetector can indirectly detect the signal. Furthermore, with considerable recent advancements of semiconductor technologies, electronic semiconductor arrays such as charge-coupled device (CCD) and complementary metal-oxide-semiconductor (CMOS) have been developed for UV sensing so that UV light can be directly converted to electronic signals.…”