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Updated: Sep 15, 2025

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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Published on: August 2, 2019

Two-dimensional indium selenide wafers for integrated electronics.

Biao Qin^1,2, Jianfeng Jiang³, Lu Wang⁴

¹State Key Laboratory for Mesoscopic Physics, Frontiers Science Centre for Nano-optoelectronics, School of Physics, Peking University, Beijing, China.

Science (New York, N.Y.)

|July 17, 2025

Summary

This summary is machine-generated.

Researchers developed a novel solid-liquid-solid method to create high-quality two-dimensional (2D) indium selenide wafers. This breakthrough in 2D semiconductor fabrication achieves superior electronic performance for next-generation electronics.

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Published on: July 17, 2020

Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Two-dimensional (2D) indium selenide shows promise for advanced electronics due to its excellent electronic properties.
Existing methods for growing 2D indium selenide films haven't matched the performance of exfoliated flakes.

Purpose of the Study:

To develop a scalable method for producing high-performance 2D indium selenide films.
To overcome the limitations of current 2D semiconductor fabrication techniques.

Main Methods:

A solid-liquid-solid strategy was employed to convert amorphous indium selenide films.
An indium-rich liquid interface was created, maintaining a precise 1:1 indium to selenium stoichiometry.
The process resulted in pure-phase, high-crystallinity indium selenide wafers across ~5-centimeter substrates.

Main Results:

The fabricated indium selenide films demonstrated exceptional uniformity, phase purity, and high crystallinity.
Transistor arrays fabricated on these wafers exhibited superior electronic performance compared to other 2D film devices.
Key performance metrics included an average mobility of 287 cm²/Vs and a subthreshold swing of 67 mV/decade at room temperature.

Conclusions:

The solid-liquid-solid method enables the production of high-quality 2D indium selenide wafers suitable for high-performance electronic applications.
This advancement paves the way for 2D semiconductors to potentially outperform silicon-based electronics.
The achieved electronic properties represent a significant step forward in 2D material-based device engineering.