Organic Infrared Upconversion Device

Abstract

Novel infrared‐to‐visible light upconversion devices are demonstrated by fabricating an organic light‐emitting diode with an infrared‐sensitizing layer. With a SnPc:C60 mixed layer as an infrared absorber and fac‐tris(2‐phenylpyridinato) iridium (III) (Irppy3) as an emitter, an infrared‐to‐green up‐conversion device is demonstrated under 830‐nm irradiation (see figure, ITO=indium tin oxide). The maximum photon‐to‐photon conversion efficiency is 2.7% at 15V.

Organic Crystals with Near‐Infrared Amplified Spontaneous Emissions Based on 2′‐Hydroxychalcone Derivatives: Subtle Structure Modification but Great Property Change

“…[1][2][3][4] Al arge p-conjugated framework or strong donor-acceptor (D-A) skeleton is commonly adopted as the basic structural unit to construct NIR emitters.T hus,f luorescence quenching,t he general problem for luminescent organic solids,isparticularly serious for NIR fluorophores due to either attractive dipole-dipole interactions or effective intermolecular p-stacking. [5] Due to these negative influences,most of the reported efficient NIR fluorophores in dilute solutions exhibit no or weak fluorescence in solid forms.…”

Cathodic-controlled and near-infrared organic upconverter for local blood vessels mapping

“…Although there was a slightly poor electron injection in Device B, it achieved a high brightness of 1069 cd m −2 at 12 V, which is close to Device C with the brightness of 1144 cd m −2 at 12 V. Therefore, the LiF/Al EIL can considerably reduce the electron-injection barrier at the interface between the CGL and the ETL of OLED, thus providing the lowest driving voltage and the maximum brightness. The photon-to-photon conversion efficiency, η CE , was calculated by the following equation619:…”

“…On the other hand, for the development of photon-to-photon conversion efficiency, the So group published an efficient organic upconverter consisting of SnPc:C 60 NIR sensitizer and phosphorescent OLED19, which reported the maximum conversion efficiency of 2.7% at a voltage of 15 V. Most importantly, the device configuration of the upconverter is very similar to a conventional OLED, resulting in the large-area device possibly being prepared via thermal evaporation processes. Based on the high compatibility of the fabrication process in thermal evaporation, the organic upconverter seems to be a promising alternative for traditional upconverters because of the low cost and simplified fabrication process2021.…”

“…In addition, the conversion efficiency exceeded 6% at 7 V and the image resolution achieved 400 dots per inch (dpi). Note that such an organic upconverter’s performance is the highest value reported to date68141519. To realize a new IR imaging device, in this paper we describe a 3.46% conversion efficiency, cathodic-controlled, and NIR organic upconverter for 3D mapping applications, where our proposed imaging system included several components, i.e.…”

Cross-linking of a poly(3,4-ethylene dioxythiophene):(polystyrene sulfonic acid) hole injection layer with a bis-azide salt and the effect of atmospheric processing conditions on device properties

“…V C 2012 American Institute of Physics. Organic materials have been making multiple inroads into the electronics market over the past 20 years, finding applications from light-emitting diodes (LEDs) in displays, lighting, 1,2 and night-vision readable displays 3 to photovoltaics, 4,5 upconversion devices, 6 and radio frequency identification tags (RFID). Their attractiveness is attributed to their highly tunable optoelectronic properties combined with low cost processing that is suitable for large area devices.…”