Transparent Organic Upconversion Devices Displaying High-Resolution, Single-Pixel, Low-Power Infrared Images Perceived by Human Vision

Sci. Adv., 9 (2023) eadd7526.

DOI: 10.1126/sciadv.add7526

我們提出了一種基於全有機非富勒烯的上轉換裝置，該裝置透過錯體型發光系統，將不可見的紅外信號帶入人類可視視覺。該元件就 940 nm近紅外光（功率密度為 103.8 μW/cm²），實現了 12.56% 的上轉換效率。此外，我們成功研製出一個半透明（AVT，~60%）、大面積（10.35 cm²）、重量輕（22.91 g）的單像素上轉換面板，其可視化光強度可低於0.75 μW/cm²的近紅外功率密度，該線性動態範圍接近80分貝。

We propose an all-organic non-fullerene-based upconversion device that brings an invisible infrared signal into human vision via an exciplex cohost light-emissive system. The device reaches an infrared-to-visible upconversion efficiency of 12.56% by resolving the 940-nm infrared signal (power density of 103.8 mW/cm²). We tailor a semitransparent (AVT, ~ 60%), large-area (10.35 cm²), lightweight (22.91 g), single-pixel upconversion panel to visualize the infrared power density down to 0.75 mW/cm², inferring a bias-switching linear dynamic range approaching 80 dB.