Researchers at UNSW Sydney have developed a novel chip-scale method using organic light-emitting diodes (OLEDs) to create portable quantum sensors for magnetic field imaging, potentially transforming smartphones into diagnostic tools. This technique addresses the limitations of traditional quantum sensors, which typically require expensive and bulky setups involving lasers and cryogenic temperatures. By utilizing OLEDs—already widely used in displays like televisions and smartphones—the new method allows for smaller, flexible, and mass-producible devices.
The technology relies on electrically detected magnetic resonance (EDMR) and optically detected magnetic resonance (ODMR), which employ a camera and microwave electronics to map magnetic fields, similar to Magnetic Resonance Imaging (MRI). This innovative approach leverages the sensitivity of OLEDs to magnetic fields, making it suitable for applications in scientific research, industry, and medicine. The researchers, led by Professor Dane McCamey and first author Dr. Rugang Geng, have filed a patent for their invention, envisioning its use for remote medical diagnostics and detecting material defects. Although the study shows promising results, further work is necessary to enhance sensitivity and reduce readout times. The findings were published in Nature Communications.
