79 citations · 223 across the 7 of their papers we have counts for
7 papers
Epitaxial formation of ultrathin HfO2 on graphene by sequential oxidation
Zhenjing Liu, Qian Mao, Varun Kamboj +6
We demonstrate the formation of epitaxial, ultrathin hafnia (HfO2) on graphene. Monoclinic hafnia (m-HfO2) forms as the end of a series of sequential oxidation reactions. Starting…
Atomic Structure of Self-Buffered BaZr(S,Se) Epitaxial Thin Film Interfaces
Michael Xu, Kevin Ye, Ida Sadeghi +2
Understanding and controlling the growth of chalcogenide perovskite thin films through interface design is important for tailoring film properties. Here, the film and interface str…
A Processing Route to Chalcogenide Perovskites Alloys with Tunable Band Gap via Anion Exchange
Kevin Ye, Ida Sadeghi, Michael Xu +6
We demonstrate synthesis of BaZr(S,Se)3 chalcogenide perovskite alloys by selenization of BaZrS3 thin films. The anion-exchange process produces films with tunable composition and…
Modeling Defect-Level Switching for Highly-Nonlinear and Hysteretic Electronic Devices
Jiahao Dong, R. Jaramillo
Previously, we demonstrated hysteretic and persistent changes of resistivity in two-terminal electronic devices based on charge trapping and detrapping at immobile metastable defec…
Crystal growth and structural analysis of perovskite chalcogenide BaZrS and Ruddlesden-Popper phase BaZrS
Shanyuan Niu, Boyang Zhao, Kevin Ye +7
Perovskite chalcogenides are gaining substantial interest as an emerging class of semiconductors for optoelectronic applications. High quality samples are of vital importance to ex…
Ideal Bandgap in a 2D Ruddlesden-Popper Perovskite Chalcogenide for Single-junction Solar Cells
Shanyuan Niu, Debarghya Sarkar, Kristopher Williams +12
Transition metal perovskite chalcogenides (TMPCs) are explored as stable, environmentally friendly semiconductors for solar energy conversion. They can be viewed as the inorganic a…
Transient terahertz photoconductivity measurements of minority-carrier lifetime in tin sulfide thin films: Advanced metrology for an early-stage photovoltaic material
R. Jaramillo, Meng-Ju Sher, Benjamin K. Ofori-Okai +7
Materials research with a focus on enhancing the minority-carrier lifetime of the light-absorbing semiconductor is key to advancing solar energy technology for both early-stage and…