Tellurene Photodetector with High Gain and Wide Bandwidth. Academic Article uri icon


  • Two-dimensional (2D) semiconductors have been extensively explored as a new class of materials with great potential. In particular, black phosphorus (BP) has been considered to be a strong candidate for applications such as high-performance infrared photodetectors. However, the scalability of BP thin film is still a challenge, and its poor stability in the air has hampered the progress of the commercialization of BP devices. Herein, we report the use of hydrothermal-synthesized and air-stable 2D tellurene nanoflakes for broadband and ultrasensitive photodetection. The tellurene nanoflakes show high hole mobilities up to 458 cm2/Vs at ambient conditions, and the tellurene photodetector presents peak extrinsic responsivity of 383 A/W, 19.2 mA/W, and 18.9 mA/W at 520 nm, 1.55 m, and 3.39 m light wavelength, respectively. Because of the photogating effect, high gains up to 1.9 103 and 3.15 104 are obtained at 520 nm and 3.39 m wavelength, respectively. At the communication wavelength of 1.55 m, the tellurene photodetector exhibits an exceptionally high anisotropic behavior, and a large bandwidth of 37 MHz is obtained. The photodetection performance at different wavelength is further supported by the corresponding quantum molecular dynamics (QMD) simulations. Our approach has demonstrated the air-stable tellurene photodetectors that fully cover the short-wave infrared band with ultrafast photoresponse.

published proceedings

  • ACS Nano

altmetric score

  • 12.1

author list (cited authors)

  • Shen, C., Liu, Y., Wu, J., Xu, C., Cui, D., Li, Z., ... Zhou, C.

citation count

  • 88

complete list of authors

  • Shen, Chenfei||Liu, Yihang||Wu, Jiangbin||Xu, Chi||Cui, Dingzhou||Li, Zhen||Liu, Qingzhou||Li, Yuanrui||Wang, Yixiu||Cao, Xuan||Kumazoe, Hiroyuki||Shimojo, Fuyuki||Krishnamoorthy, Aravind||Kalia, Rajiv K||Nakano, Aiichiro||Vashishta, Priya D||Amer, Mor R||Abbas, Ahmad N||Wang, Han||Wu, Wenzhuo||Zhou, Chongwu

publication date

  • January 2020