A non-volatile “programmable” transparent multilevel ultra-violet perovskite photodetector

摘要: Due to their outstanding physical properties, perovskite materials are considered be promising semiconductors for next-generation optoelectronics. However, these often unstable under an ambient atmosphere and ultra-violet illumination. Therefore, the construction of air-stable visible light transparent perovskite-based photodetector is still highly challenging. In this study, we go beyond conventional operation photodetectors by utilizing undesired hysteresis loop in typical current–voltage characteristics perovskites design a (C4H9NH3)2PbBr4-based high-performance programmable photodetector. The shows multiple operating levels can switch from one level another with short electric pulse. exhibits fast response time ∼2 ms, good responsivity ∼32 mA W−1 detectivity 8.5 × 108 Jones low working voltage 0.5 V. Moreover, long-term stability, optoelectronic performance retained conditions. This breakthrough controlled tunable features opens new avenue development multipurpose devices.