Northwestern Polytechnical University, academician Huang team \”natural • Electronics\”: research perovskite photonics breakthrough

Recently, flexible electronics Northwestern Polytechnical University Institute (IFE), flexible electronics materials in cooperation with the Laboratory of the Ministry of Industry and Information Technology Professor Huang Wei academician with the University of Linkoping, Sweden Feng Gao, Shenzhen University, Professor Wenjing Zhang devices, the top international journal \”Nature • Electronics \”significant progress perovskite field of photonics (Nature Electronics) published\” with the same two perovskite diodes bidirectional optical signal transmission \”(bidirectional optical signal transmission between two identical devices using perovskite diodes). bidirectional optical signal transmission on each side generally requires a set of signal receivers and the signal emitter. If enough signal receiving and transmitting functions integrated into the same device can contribute to miniaturization or higher integration density device integration of devices, cost reduction, this strategy resulting in the traditional III-V semiconductor devices the implementation and application of a wide range. However, the solution method for processing organic and semiconductor quantum dots, since always limited by the material properties is difficult to achieve. Lead is a halide perovskite type inexpensive and good optical properties of semiconductor materials developed rapidly in recent years and has demonstrated good performance in the field of light emitting diode (LED) and a photodetector and the like. Further, the perovskite material having a very small Stokes shift, so that they can respond to their emitted light. These excellent properties met by a single dual function (light emitting / light detection) devices to achieve bidirectional signal transmission prerequisite. Even so, while the preparation of high performance in response to light and the light emitting diode device perovskite remains a great challenge. In response to this scientific problem, recently, flexible electronics Northwestern Polytechnical University Institute (IFE) and academician Professor Huang Feng Gao, Sweden Linkoping University, Shenzhen University, Professor Wenjing Zhang joint report a novel bifunctional perovskite device, at the same time includes the date the most efficient field emission properties of the perovskite (external light emitting quantum efficiency of 21%) and the detection performance of the most light sensitive (detection limit Piva grade). The device can adjust the bias switching two functions of freedom,In addition, either as a light emitting or light detecting, the response speed of the device has reached megahertz (MHz) level. Based on both the high performance and the response speed of the diode device, the team achieved two-way signal transmission function through the same two devices, and their applications in real-time to verify pulse monitoring. Huang academician pointed out, IFE and the IAM team as one of the light-emitting area of ​​the perovskite international pioneers, long-term commitment to the development of perovskite-emitting materials, research and explore new applications of mechanisms. Thanks to our previous work on the preparation of high performance light emitting devices perovskite experience, including \”perovskite efficient emission regulation dimension\” (Nat. Photon. 2016, 10, 699), \”Efficient submicron structure the light extraction \”(Nature 2018, 562, 249), and\” high performance perovskite rational molecular light emitting diode passivation \”(Nat. Photon. 2019, 13, 418) and the like. This new research expands the application again perovskite materials in optoelectronics. More research was funded by the National Key Basic Research Program, National Natural Science Foundation of China and the like. Article link as follows: http://dx.doi.org/10.1038/s41928-020-0382-3