Among III-VI materials, indium telluride (InTe) is well-known as a thermoelectric (TE) material in previous study [14,15]. It has been reported that the polycrystalline InTe possesses a high TE figure-of-merit (FOM) ZT of 0.9 and ultralow lattice thermal conductivity of ~0.3–0.4 Wm-1K− 1 at temperature of 600 K [16,17], which makes it promising for high performance TE applications. Besides, bulk InTe crystal is a semiconductor with a bandgap of 1.16 eV [18]. At high pressure, InTe crystal undergoes a phase transformation from tetragonal to cubic, which brings it to metallic state [18]. Compared with other III-VI members,such as InSe and GaSe, InTe exhibits much larger electrical conductivity, making it promising for development of photodetection devices with high sensitivity and fast response speed. Besides, the stability in air of ultrathin InTe is also superior to those of other III-VI materials, which provides it great potential for practical devices. However, the investigation of InTe in 2D scale has received much less attention compared to 2D InSe or GaSe. The electronic and optoelectronic properties of 2D InTe are not very clear up to now. Moreover, InTe was usually fabricated by Bridgman-Stockbarger method or thermal evaporation in previous studies [14,19], resulting in single crystalline bulks or films with thickness of hundreds of nanometers, which is not applicable for growing ultrathin InTe nanosheets. Up to now, the usual methods to prepare 2D materials, such as mechanical exfoliation or CVD have not been reported for synthesizing 2D InTe. The difficulty in preparation of 2D InTe greatly limits its fundamental research and development of device applications.