At night, there is insufficient light and poor contrast. If you want to see at night, it is a big problem for the human eye. Recently, the Optoelectronic Engineering Technology Research Center of Yunnan University has developed a new type of optoelectronic chip that can be used in mobile phones, glasses and other common tools in the future, so that ordinary people can also have the "night vision" function.
Difficult to see at night is the peak period of illegal activities such as robbery and terrorist attacks. How to convert invisible light such as infrared light into visible light is a core technology for military and civilian use developed by countries all over the world. However, the current professional night vision equipment is bulky and expensive, and is generally used in the military and scientific research fields, and cannot be applied to civilian portable equipment.
Recently, Yunnan University has made a breakthrough in this technology.
Lu Zhenghong is a specially appointed professor of Yunnan University and director of the Optoelectronic Engineering Technology Research Center. He was recently elected as a member of the Canadian Academy of Engineering. The team he led developed a new optoelectronic chip that allows humans to see things better in the dark. The innovative point of the chip is to integrate infrared photosensitive materials in series with two organic light-emitting diodes (OLEDs), first use infrared photosensitive materials to absorb infrared radiation to generate photo-generated carriers, and then use photo-generated carriers to drive OLEDs to produce visible light emission, thereby The purpose of infrared detection and imaging. The chip can not only directly convert infrared radiation into visible light, but also simultaneously capture electrons and holes induced by infrared radiation, so that the conversion efficiency of infrared light to visible light can be broken, up to 5%, close to the theoretical limit of 6.5%.
Some of the results were published in the Applied Physics Letters of the Natural Index Journal with Dr. He Shoujie, Department of Physics, Yunnan University as the first author, and were recommended as highlight articles on the journal homepage. In addition, the research results were evaluated by Dr. Mara Johnson-Groh from AIP Scilights. This new method will be widely used in new infrared imaging devices, providing technical support for future low-cost, large-area infrared imaging, and promoting Depending on the development and application of technology.
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