Enhanced Photodetection Properties of Tellurium@Selenium Roll-to-Roll Nanotube Heterojunctions

Weichun Huang; Ye Zhang; Qi You; Pu Huang; Yunzheng Wang; Ziyin N Huang; Yanqi Ge; Leiming Wu; Zhijun Dong; Xiaoyu Dai; Yuanjiang Xiang; Jianqing Li; Xiuwen Zhang; Han Zhang

doi:10.1002/smll.201900902

Enhanced Photodetection Properties of Tellurium@Selenium Roll-to-Roll Nanotube Heterojunctions

Small. 2019 Jun;15(23):e1900902. doi: 10.1002/smll.201900902. Epub 2019 Apr 24.

Authors

Weichun Huang¹, Ye Zhang¹, Qi You¹, Pu Huang², Yunzheng Wang¹, Ziyin N Huang³, Yanqi Ge¹, Leiming Wu⁴, Zhijun Dong⁵, Xiaoyu Dai¹, Yuanjiang Xiang¹, Jianqing Li⁴, Xiuwen Zhang², Han Zhang¹

Affiliations

¹ SZU-NUS Collaborative Innovation Centre for Optoelectronic Science & Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.
² Shenzhen Key Laboratory of Flexible Memory Materials and Devices, College of Electronic Science and Technology, Shenzhen University, Shenzhen, 518060, P. R. China.
³ Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA.
⁴ Faculty of Information Technology, Macau University of Science and Technology, Macao, 519020, P. R. China.
⁵ Shenzhen Institute of Information Technology, Shenzhen, 518172, P. R. China.

PMID: 31016874
DOI: 10.1002/smll.201900902

Abstract

Non-layered tellurium (Te) is a promising material for applications in transistor and optoelectronic devices for its advantages in excellent intrinsic electronic and optoelectronic properties. However, the poor photodetection performance and relatively uncertain stability of tellurene under ambient conditions greatly limit the practical applications. In order to improve the performance of tellurene-based materials, Te@Se roll-to-roll nanotubes with different selenium (Se) contents synthesized by epitaxial growth of Se on Te nanotubes are, for the first time, employed to fabricate working electrodes for photoelectrochemical (PEC)-type broadband photodetection. They exhibit not only a preferably enhanced capacity for self-powered broadband photodetection but also significantly improved photocurrent density and stability in various aqueous environments (HCl, NaCl, and KOH solutions), compared to tellurene-based photodetectors. It is anticipated that the present work can open up new possibilities for high-performance tellurene-based optoelectronic devices.

Keywords: heterostructures; photodetectors; selenium; self-powered; tellurium.

Abstract

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