At the recent SID 2025 exhibition, French research institute CEA-Leti published a paper showing its latest achievements in heterogeneous synergistic integration of gallium nitride Micro LED technology and organic photodetectors (OPD), marking a further improvement in the performance of multifunctional displays integrating display and sensing functions.

According to reports, Micro LED technology has shown great potential in future display applications due to its extremely high brightness and extremely small size, and its compact design also reserves space for integrating more functions. Therefore, Micro LED has become an ideal candidate technology that integrates display and sensing functions. However, achieving seamless synergistic integration between Micro LED and photodetectors has always been a major technical challenge.

And CEA-Leti's latest research has successfully achieved the synergistic integration of Micro LED and photodetectors, laying the foundation for multifunctional display applications such as imaging, gesture recognition, and biometric scanning.

It is reported that a major problem in the integration of Micro LED and photodetectors is the phenomenon of crosstalk coupling, which means that the light emitted by Micro LED is directly received by the photodetector before it is irradiated to the observation scene, causing interference and reducing sensing performance. CEA-Leti's research paper studies this problem, deeply explores how the distance between the illumination source and the photodetector affects the crosstalk, and provides key insights for overcoming this bottleneck.

With the further resolution of the main difficulties, the future co-integration technology of Micro LED and organic photodetectors will enable displays to not only display content, but also realize environmental perception, intelligent interaction, biometrics and real-time health monitoring, and integrate all functions into a compact device.

CEA-Leti revealed that after this breakthrough in co-integration technology, the company's next stage of research will focus on the application potential of this technology in specific scenarios (such as physiological parameter tracking). Researchers will also further study different types of photodetectors that can be co-integrated with Micro LED to optimize performance, reduce crosstalk, and further enhance versatility.