Solar energy paper index
Self-powered, linear, low-light upconversion for high-quality near-infrared imaging
One-line summary
A solar energy research paper on Self-powered, linear, low-light upconversion for high-quality near-infrared imaging.
Engineering notes
Engineering notes will be added by the Power for Solar editorial team.
Chinese explanation / 中文解读
中文解读待补充：本站会优先为光伏效率、钙钛矿太阳能电池、储能技术、太阳能热利用、BIPV、并网技术等高价值论文补充中文说明。
Original abstract
Abstract Visualising near-infrared (NIR) radiation at ultra-low power promises advanced, remote metrology for human physiology, farming, forest, and peripheral infrastructure. While NIR-to-visible upconversion enables reliable NIR imaging, material-based approaches suffer from modest efficiencies, high excitation intensities, non-linear response, and/or limited bio-compatibility. We overcome those hurdles by introducing a self-driven, circuit-based upconverter architecture. The monolithic thin-film stack comprises serially connected, organic NIR photodetectors, providing sufficient photovoltage to drive an organic light-emitting diode. We combine state-of-the-art, vacuum-processable absorbing and emitting systems with careful, simulation-assisted stack engineering. Converting photons from NIR (≤ 835 nm) to green (530 nm), we achieve an external upconversion efficiency (EUE) as high as 1.9%. Remarkably, the device turns on an ultra-low NIR intensity of 9 µW/cm², which is 4000 times lower than for any previous bias-free upconverter film with a comparable EUE. We outperform a commercial NIR detection card and demonstrate high-quality, linear NIR vision, providing a solid foundation for future low-cost use cases.
Links and sources
Need this topic turned into a technical roadmap?
Power for Solar can prepare a custom solar energy literature review, simulation code map, dataset map, and B2B photovoltaic technology assessment.
Request B2B research
Comments