Direct Polarimetric Image Sensor and Wide Spectral Response Based on Quasi‐1D Sb2S3 Nanowire. (29th October 2020)

• Record Type: Journal Article
• Authors: Zhao, Kai; Yang, Juehan; Zhong, Mianzeng; Gao, Qiang; Wang, Yang; Wang, Xiaoting; Shen, Wanfu; Hu, Chunguang; Wang, Kaiyou; Shen, Guozhen; Li, Ming; Wang, Jianlu; Hu, Weida; Wei, Zhongming
• Is Part Of: Advanced functional materials. Volume 31:Number 6(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-10-29
• Subjects: dichroism -- image sensor -- nanowires -- Sb 2S 3 -- wide‐band response; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202006601
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Polarized photodetectors with wide spectral detection and ultra‐fast photoresponses based on anisotropic semiconductors have potential applications in military and civilian fields and have been widely studied in recent years. The dual advantages of low‐symmetry crystal structure and special electronic band‐structure make Sb2 S3 the perfect choice for polarized photodetection. In this work, the optical, vibrational, and optoelectronic anisotropy of the high‐quality orthorhombic Sb2 S3 nanowires are systematically investigated by experimental and theoretical studies. The metal‐semiconductor‐metal photodetectors based on a single Sb2 S3 nanowire exhibit good polarization sensitivity in a broadband range from ultraviolet to near‐infrared (360 to 1550 nm) and the obtained maximum dichroic ratio is 2.54 at 638 nm. The polarization‐sensitive photocurrent mapping results show that the photocurrent is mainly derived from the Schottky junction at the interface between Au and Sb2 S3 . The effective separation of the photo‐generated carriers near the Schottky junction gives a photodetector response time of 470 µs. The direct polarimetric imaging demonstrates that the gray value of the image obtained by the imaging system is sensitive to the object's polarized direction. This natural sensitivity of the Sb2 S3 ‐based photodetector to polarized objects makes it possible to image polarized objects directly as an image sensor. Abstract : The dual advantages of low symmetry crystal structure and wide‐band spectral response make Sb2 S3 the perfect choice for polarized photodetection. An Sb2 S3 ‐based metal‐semiconductor‐metal photodetector exhibits good polarization characteristics in a wide spectral range from ultraviolet to near‐infrared, which makes Sb2 S3 a good prospect in the field of polarized photodetection and direct polarimetric imaging.