 We have identified four two-dimensional, 2D materials, WSE2, PTS2, .A2, and .A2 that could potentially be used as components in electronic devices due to their high electron mobilities and finite band gaps. These materials are all composed of transition metals and sulfur, selenium or tellurium atoms, and they exhibit phonon-limited electron mobilities up to 4,000 cm2 slash vs minus one at room temperature. This makes them ideal candidates for use in semiconductor devices such as transistors and diodes. This article was offered by Zhishu Huang, Wenzhou Zhang, and Wanli Zhang.