摘要
Functional signal conversion devices are critical components of next-generation intelligent systems,driving an urgent demand for novel sensing materials and functionalities to enable advanced applications in intelligent robotics and human-machine interfaces.In this work,we present a quantum dot light-emitting diode(QLED)array based on a newly developed signal conversion functional material 20%Gd-doped CeO_(2-x)(CGO).Under pressure and electric field induction,the oxygen vacancy dynamics in CGO were modulated,resulting in macroscopic polarization charges,reflecting the mechanical force-electrical response effect.The QLED pixel emission intensity was controlled by external pressure,achieving a remarkable1000%enhancement at 1.8 GPa.Combined with resolution-tunable Si MWs array,mapping of 2D pressure distribution on external objects with optical signals was realized.This work extends the force-electrical-optical signal conversion mechanism to centrosymmetric cubic fluorite materials,overcoming the traditional limitations of piezo-phototronic devices that rely on specific crystal symmetries,and provides new avenues for the development of the next-generation smart sensing.
基金
financially supported by the National Natural Science Foundation of China(Nos.52192610,62422120,52371202,52125205,and 52250398)
the Natural Science Foundation of Beijing Municipality(No.L223006)
Shenzhen Science and Technology Program(No.KQTD20170810105439418)
the Fundamental Research Funds for the Central Universities
