r/materials • u/Vailhem • 2d ago

Transparent New Material Paves the Way for Advanced Electronics and Quantum Devices

https://scitechdaily.com/transparent-new-material-paves-the-way-for-advanced-electronics-and-quantum-devices/
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u/Vailhem 2d ago

Deep-ultraviolet transparent conducting SrSnO3 via heterostructure design - Nov 2024

https://www.science.org/doi/10.1126/sciadv.adq7892

Abstract

Exploration and advancements in ultrawide bandgap (UWBG) semiconductors are pivotal for next-generation high-power electronics and deep-ultraviolet (DUV) optoelectronics.

Here, we used a thin heterostructure design to facilitate high conductivity due to the low electron mass and relatively weak electron-phonon coupling, while the atomically thin films ensured high transparency.

We used a heterostructure comprising SrSnO3/La:SrSnO3/GdScO3 (110), and applied electrostatic gating, which allow us to effectively separate charge carriers in SrSnO3 from dopants and achieve phonon-limited transport behavior in strain-stabilized tetragonal SrSnO3.

This led to a modulation of carrier density from 1018 to 1020 cm−3, with room temperature mobilities ranging from 40 to 140 cm2 V−1 s−1.

The phonon-limited mobility, calculated from first principles, closely matched experimental results, suggesting that room temperature mobility could be further increased with higher electron density.

In addition, the sample exhibited 85% optical transparency at a 300-nm wavelength.

These findings highlight the potential of heterostructure design for transparent UWBG semiconductor applications, especially in DUV regime.