Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea.
ACS Appl Mater Interfaces. 2018 Apr 18;10(15):12768-12772. doi: 10.1021/acsami.7b19406. Epub 2018 Apr 9.
We demonstrate the pulsed voltage tunable multileveled resistive switching (RS) across a promising transparent energy material of (CHNH)PbBr. The X-ray diffraction and scanning electron microscopy results confirm the growth of (001) plane-orientated nanostructures of (CHNH)PbBr with an average size of ∼360 nm. The device depicts optical transmittance higher than 70% in the visible region and efficient absorbance in the ultraviolet region. The current-voltage measurement shows the bipolar RS. In addition, depending on the magnitude of applied electric pulse, the current across the device can be flipped in four different levels, which remain stable for long time, indicating multimode RS. Further, the current across the device increases gradually by applying continuous pulses, similar to the biological synapses. The observed results are attributed to the electric field-induced ionic migration across the (CHNH)PbBr. The existing study should open a new avenue to apply this promising energy material of perovskite for multifunctional advanced devices.
我们展示了在有前途的透明能材料（CHNH）PbBr 上实现的脉冲电压可调多级电阻式开关（RS）。X 射线衍射和扫描电子显微镜结果证实了（CHNH）PbBr 的（001）面取向纳米结构的生长，平均尺寸约为 360nm。该器件在可见光区具有高于 70%的光透过率和在紫外区的有效吸收率。电流-电压测量显示出双极 RS。此外，根据施加电脉冲的幅度，器件中的电流可以在四个不同的水平翻转，这些水平长时间保持稳定，表明存在多模 RS。此外，通过施加连续脉冲，器件中的电流逐渐增加，类似于生物突触。观察到的结果归因于电场诱导的离子在（CHNH）PbBr 中的迁移。现有研究应该为应用这种有前途的钙钛矿型能量材料开辟一条新途径，用于多功能先进设备。
