A High‐Performance Flexible Broadband Photodetector Based on Graphene–PTAA–Perovskite Heterojunctions. (25th January 2021)

• Record Type: Journal Article
• Authors: Zhou, Guigang; Sun, Rui; Xiao, Yan; Abbas, Ghulam; Peng, Zhengchun
• Is Part Of: Advanced Electronic Materials. Volume 7:Number 3(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-01-25
• Subjects: broadband wavelengths -- flexible photodetectors -- graphene–PTAA–perovskite heterojunctions; Materials -- Electric properties -- Periodicals; Materials science -- Periodicals; Magnetic materials -- Periodicals; Electronic apparatus and appliances -- Periodicals; 537
• DOI: 10.1002/aelm.202000522
• Languages: English
• ISSNs: 2199-160X

Abstract

Abstract: Organometal halide perovskites (CH3 NH3 PbI3− x Cl x ) have received considerable attention in the field of optoelectronics due to their strong light absorption and long carrier lifetime. However, the performance such as response speed, responsivity, and stability of such detectors still need to be improved. In this paper, a flexible photodetector (PD) composed of multilayered structure of graphene–poly[bis(4‐phenyl)(2, 4, 6‐trimethylphenyl)amine] (PTAA)–perovskite‐poly(methyl methacrylate) (PMMA) is proposed. The PD can detect a wide wavelength range from ultraviolet to near infrared. The PD shows a high detectivity of ≈10 13 Jones and a responsivity of 10 5 A W −1 at 360 nm. More importantly, the device also shows a high bending durability, fast response time, and good stability in air due to the protection of the PMMA layer. The facile and low‐cost fabrication of the flexible perovskite‐based hybrid photodetector indicates the mass production for the potential application in sensitive broadband photodetection. Abstract : A flexible and broadband photodetector with 100 µm channel exhibiting detectivity of ≈10 13 Jones and responsivity of 10 5 A W −1 is realized via a facile and low‐cost fabrication of graphene–poly[bis(4‐phenyl)(2, 4, 6‐trimethylphenyl)amine] (PTAA)–perovskite‐poly(methyl methacrylate) (PMMA) heterojunctions. Compared with graphene–perovskite devices with narrower channels, the photoresponse speed and stability of the device are greatly improved, owing to the incorporation of PTAA and PMMA layers.