Electrical contacts for high performance optoelectronic devices of BaZrS3 single crystals

Abstract

Chalcogenide perovskites such as BaZrS3 are promising candidates for next generation optoelectronics such as photodetectors and solar cells. Compared to widely studied polycrystalline thin films, single crystals of BaZrS3 with minimal extended and point defects, are ideal platform to study the material's intrinsic transport properties and to make first-generation optoelectronic devices. However, the surface dielectrics formed on BaZrS3 single crystals due to sulfating or oxidation have led to significant challenges to achieving high quality electrical contacts, and hence, realizing the high-performance optoelectronic devices. Here, we report the development of electrical contact fabrication processes on BaZrS3 single crystals, where various processes were employed to address the surface dielectric issue. Moreover, with optimized electrical contacts fabricated through dry etching, high-performance BaZrS3 photoconductive devices with a low dark current of 0.1 nA at 10 V bias and a fast transient photoresponse with rise and decay time of <0.2 s were demonstrated.

References in corpus (13)

• Band-Gap Control via Structural and Chemical Tuning of Transition Metal Perovskite Chalcogenides
• Fabrication of BaZrS3 chalcogenide perovskite thin films for optoelectronics
• Thermal Stability Study of Transition Metal Perovskite Sulfides
• An Environmentally Stable and Lead-Free Chalcogenide Perovskite
• Chalcogenide perovskite BaZrS3 thin-film electronic and optoelectronic devices by low temperature processing
• Crystal growth and structural analysis of perovskite chalcogenide BaZrS${}_3$ and Ruddlesden-Popper phase Ba${}_3$Zr${}_2$S${}_7$
• Growth kinetics and atomistic mechanisms of native oxidation of ZrS${}_x$Se${}_{2-x}$ and MoS${}_2$ crystals
• Unconventional Charge-density-wave Order in a Dilute d-band Semiconductor
• Charge-density-wave resistive switching and voltage oscillations in ternary chalcogenide BaTiS3
• Molten flux growth of single crystals of quasi-1D hexagonal chalcogenide BaTiS3
• A Polymeric Planarization Strategy for Versatile Multi-terminal Electrical Transport Studies on Small, Bulk Quantum Materials
• A system built for both deterministic transfer processes and contact photolithography
• A strategy for fabricating micro-scale freestanding single-crystalline complex oxide device arrays