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INFRARED IMAGING: OLED converts IR to visible: Night vision for your cell phone?

机译:红外成像:OLED将红外转换为可见光:手机的夜视功能?

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Optical upconversion--the process of converting light at one wavelength to that of a shorter wavelength (with "up" being higher in the frequency spectrum)--is possible by directly combining photodetectors with LEDs. Unfortunately, the fabrication process is difficult for inorganic or even hybrid organic/inorganic devices and photon-to-photon conversion efficiencies are very low-typically less than 1percent. In addition, fabrication is expensive, and some alternative upconversion methods using quantum dots as an infrared (IR) absorber suffer from high dark currents. But thanks to advances in organic photodetectors and organic LEDs (OLEDs) with very high external quantum efficiencies (EQEs) on the order of 20percent, researchers at the University of Florida (Gainesville, FL) have demonstrated a more efficient all-organic upconversion device that just may make night vision on your cell phone a possibility.
机译:光学上转换-将一个波长的光转换为较短波长的光的过程(在频谱中“向上”变高),可以通过将光电探测器与LED直接组合来实现。不幸的是,对于无机或什至混合的有机/无机器件而言,制造过程是困难的,并且光子到光子的转换效率非常低,典型地小于1%。另外,制造昂贵,并且使用量子点作为红外(IR)吸收剂的一些替代的上转换方法遭受高暗电流的困扰。但是,由于有机光电探测器和具有非常高的外部量子效率(EQE)的有机LED(OLED)的进步,其数量级约为20%,佛罗里达大学(Gainesville,FL)的研究人员展示了一种更高效的全有机上转换器件,只是可能使您手机上的夜视成为可能。

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