High Sensitive and Broadband Photodetectors Based on Hybrid PbI2 Nanosheet/CdSe Nanobelt. Issue 20 (18th July 2021)

• Record Type: Journal Article
• Authors: Li, Chenyan; Li, Weijun; Cheng, Mingming; Yang, Weiye; Tan, Qiuhong; Wang, Qianjin; Liu, Yingkai
• Is Part Of: Advanced optical materials. Volume 9:Issue 20(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-07-18
• Subjects: 2D hybrid devices -- CdSe nanobelts -- optoelectric performance -- photodetectors -- PbI2 nanosheets; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.202100927
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract: The limited detection of lead iodide (PbI2 ) to visible light hinders the further development of PbI2 in the field of optoelectronic applications. A photodetector based on PbI2 nanosheet/CdSe nanobelt (PbI2 NS/CdSe NB) is prepared for the first time. This composite structure exhibits broadband spectral photoresponse from ultraviolet (400 nm) to red (730 nm). More importantly, PbI2 NS/CdSe NB can promote the effective separation of electron–hole pairs and improve the photoelectric performance. Compared to single PbI2 NS, the PbI2 NS/CdSe NB photodetector exhibits higher light–dark current ratio (6.778 × 10 3 A), responsivity (347.57 A W −1 ), and detectivity (3.625 × 10 15 Jones) under 490 nm illumination. A new strategy is provided here to design broadband and high‐performance photodetectors. Abstract : PbI2 nanosheet/CdSe nanobelt (PbI2 NS/CdSe NB) hybrid device is synthesized for the first time through a one‐step method. The PbI2 NS/CdSe NB hybrid device exhibits broadband spectral photoresponse. More importantly, PbI2 NS/CdSe NB hybrid device can promote the effective separation of electron–hole pairs and improve the photoelectric performance.