Cr 2 AlC: A High‐Temperature Transparent Conducting Ceramic
Abstract
ABSTRACT Transparent conductors with high conductivity, optical transparency, and thermal stability are critical for next‐generation optoelectronic devices, yet such materials are scarce. Here, we demonstrate that epitaxial Cr 2 AlC(0001)/Al 2 O 3 (0001) layers exhibit a unique combination of these properties. The optical transmittance of ultrathin layers reaches 85% at 900 nm and remains above 21% across the near‐infrared (NIR)ultraviolet (UV) range, in good agreement with first‐principles optical properties predictions which reveal a small plasma frequency and a low cross‐section for interband transitions. Cr 2 AlC has a room‐temperature bulk resistivity ρ o = 42.5 µΩcm and an exceptionally small resistivity scaling with a negligible (
Fields of Study & Subjects
MXene and MAX Phase Materials
Thermal Expansion and Ionic Conductivity
Advanced ceramic materials synthesis
Publication details
- Journal / source
- Advanced Materials Interfaces
- Publisher
- Wiley
- Volume
- 13
- Issue
- 6
- Publication date
- 15 February 2026
- Language
- EN