Narrow bandgap ferroelectrics are emerging as critical components for assembling high-performance optoelectronic devices with a broadband spectral response, yet integrating narrow bandgap and robust f...

Tailoring the optical properties and electronic doping in transition metal dichalcogenides (TMDs) is a central strategy for developing innovative systems with tunable characteristics. In this context, pyroelectric materials, which hold the capacity for charge generation when subjected to temperature changes, offer a promising route for this modulation. This work employs spatially resolved photoluminescence (PL) to explore the impact of pyroelectricity on the electronic doping of monolayer MoS2 deposited on periodically poled LiNbO3 (LN) substrates. The results demonstrate that pyroelectricity in LN modulates the charge carrier density in MoS2 on ferroelectric surfaces acting as doping mechanism without the need for gating electrodes. Furthermore, upon cooling, pyroelectric charges effectively reverse the doping of p-n junctions on DWs, converting them into n-p junctions. These findings highlight the potential of pyroelectric substrates for tunable and configurable charge engineering in transition metal dichalcogenides and suggest their applicability to other combinations of 2D materials and ferroelectric substrates. They also open avenues for alternative device architectures in nanoelectronic or nanophotonic devices including switches, memories or sensors.

Tailoring the optical properties and electronic doping in transition metal dichalcogenides (TMDs) is a central strategy for developing innovative systems with tunable characteristics. In this context, pyroelectric materials, which hold the capacity for charge generation when subjected to temperature changes, offer a promising route for this modulation. This work employs spatially resolved photoluminescence (PL) to explore the impact of pyroelectricity on the electronic doping of monolayer MoS2 deposited on periodically poled LiNbO3 (LN) substrates. The results demonstrate that pyroelectricity in LN modulates the charge carrier density in MoS2 on ferroelectric surfaces acting as doping mechanism without the need for gating electrodes. Furthermore, upon cooling, pyroelectric charges effectively reverse the doping of p-n junctions on DWs, converting them into n-p junctions. These findings highlight the potential of pyroelectric substrates for tunable and configurable charge engineering in transition metal dichalcogenides and suggest their applicability to other combinations of 2D materials and ferroelectric substrates. They also open avenues for alternative device architectures in nanoelectronic or nanophotonic devices including switches, memories or sensors.

Pyroelectric materials hold significant potential for energy harvesting, sensing, and imaging applications. However, achieving high-performance pyroelectricity across a wide temperature range near room temperature remains a significant challenge. Herein,…

There's a few minerals that exhibit something called piezoelectricity and pyroelectricity, which mean that either heat or pressure can turn them electric. He...