Pressure-induced enhancement and retainability of optoelectronic properties of NiPS3

Here, we report significant pressure-modulate optoelectronic properties of NiPS3. Upon compression, NiPS3 exhibited a photocurrent increase of five orders of magnitude over the initial value. Interestingly, when NiPS3 was finally decompressed to ambient conditions, the photocurrent could maintain a two-order-of-magnitude enhancement. In addition, the spectral response range was extended to the near-infrared spectral range (up to 1650 nm) under high pressure. Raman and XRD measurements and theoretical calculations revealed significant enhancement in both interlayer and intra layer interactions during compression, leading to a remarkable modulation of the optoelectronic properties. [GRAPHICS] IMPACT STATEMENT By applying pressure, giant enhancement of photocurrent and tunable spectral response range were achieved in NiPS3, which provides a potential way to modify the optoelectronic properties for materials.