Bilayer graphene based surface passivation enhanced nano structured self-powered near-infrared photodetector

Longhui Zeng, Chao Xie, Lili Tao, Hui Long, Chunyin Tang, Yuen Hong Tsang, Jiansheng Jie

Research output: Journal article publicationJournal articleAcademic researchpeer-review

32 Citations (Scopus)


A simple methyl-terminated (-CH3) surface passivation approach has been employed to enhance the performance of the bilayer graphene/Si nanohole array (BLG/SiNH array) Schottky junction based self-powered near infrared photodetector (SPNIRPD). The as-fabricated SPNIRPD exhibits high sensitivity to light at near infrared region at zero bias voltage. The Ilight/Idarkratio measured is 1.43 × 107, which is more than an order of magnitude improvement compared with the sample without passivation (∼6.4 × 1051). Its corresponding responsivity and detectivity are 0.328 AW-1and 6.03 × 1013cmHz1/2W-1, respectively. The demonstrated results have confirmed the high-performance SPNIRPD compared with the photodetectors of similar type and its great potential application in future optoelectronic devices.
Original languageEnglish
Pages (from-to)4839-4846
Number of pages8
JournalOptics Express
Issue number4
Publication statusPublished - 1 Jan 2015

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this