Author(s): Yu, JL (Yu, Jiulong); Lin, GY (Lin, Guangyang); Xia, SL (Xia, Shilong); Huang, W (Huang, Wei); Yang, TW (Yang, Tianwei); Jiao, JL (Jiao, Jinlong); Liu, XQ (Liu, Xiangquan); Chen, SY (Chen, Songyan); Li, C (Li, Cheng); Zheng, J (Zheng, Jun); Li, J (Li, Jun)

Source: APPLIED PHYSICS EXPRESS Volume: 17 Issue: 4  Article Number: 045501  DOI: 10.35848/1882-0786/ad3dc1  Published Date: 2024 APR 1 

Abstract: In this paper, single-crystal GePb films were obtained by magnetron sputtering with high substrate temperature and rapid deposition rate. The GePb films have high crystalline qualities and smooth surface. The Pb content reached 1.29% and no segregation was observed. Based on this, a GePb based p-i-n photodetector was successfully prepared. The device showed a RT dark current density of 5.83 mA cm-2 at -1.0 V and a cutoff wavelength of 1990 nm, which covers all communication windows. At the wavelength of 1625 nm, responsivity of the photodetector reached 0.132 A W-1 at -1.0 V. The device demonstrates potential application in optical communications.

Accession Number: WOS:001208057900001

ISSN: 1882-0778

eISSN: 1882-0786