K+-Free Mica Enables Bi-Based Crystal Growth for Electronics
A material family that intrinsically hosts topological, high-mobility semiconducting and ferroelectric properties offers a platform for exploring new physical phenomena and advancing next-generation electronics and optoelectronics. Bismuth-based chalcogenides and oxychalcogenides are especially promising in this context due to their compositionally tunable functionalities. However, their development is hindered by the lack of a general, scalable synthesis method, as existing
Researchers have developed a new synthesis method for creating millimeter-sized single crystals of bismuth-based chalcogenides and oxychalcogenides. This technique utilizes an atomically engineered, K+-free mica surface, allowing for the universal growth of these materials without being restricted to specific compositions or costly substrates. The materials produced exhibit desirable topological, semiconducting, and ferroelectric properties.
This advancement has led to the creation of high-performance transistors and broadband photodetectors with significant responsivity. The method also facilitates the integration of these materials into large-scale, uniform arrays, demonstrating their potential for imaging applications across visible to infrared light spectrums. The new framework offers a scalable and versatile approach for exploring and utilizing this class of functional materials.
This breakthrough provides a scalable and adaptable synthesis route for a promising class of materials, paving the way for their wider application in advanced electronics and optoelectronics.
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