Upconversion ladder enabled super-sensitive narrowband near-infrared photodetectors based on rare earth doped florine perovskite nanocrystals. (October 2020)

• Record Type: Journal Article
• Authors: Ding, Nan; Xu, Wen; Zhou, Donglei; Pan, Gencai; Li, Dongyu; Ji, Yanan; Chen, Xu; Yang, Dongwen; Bai, Xue; Ma, Chong-Geng; Song, Hongwei
• Is Part Of: Nano energy. Volume 76(2020)
• Publication Date: 2020-10
• Subjects: Narrowband near-infrared photodetectors -- Perovskite nanocrystals -- Rare earth doping -- Photon-electric upconverion; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2020.105103
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Filterless narrowband near-infrared photodetectors (NIRPDs) offer significantly reducing cost and the system volume for various applications, but limited by the poor photosensitivity. Herein, we theoretically and experimentally demonstrate a novel class of sensitive filterless NIRPDs in CsPbF3 : Zn 2+ -Yb 3+ - Tm 3+ (or Er 3+ ) perovskite nanocrystals (PeNCs)/Au nanorods (NRs) array hybrid via direct photon-electric upconverion (UC) from ground state of Yb 3+ - Tm 3+ (or Er 3+ ) to conduction band of PeNCs. It shows the selectively spectral photodetection at 980-nm NIR region with all full-width at half-maximum of 20 nm, high responsivity of 106 A/W, detectivity of 1.52 × 10 12 Jones, and external quantum efficiency of 135%. The excellent performance can be mainly ascribed to (1) direct photon-electric UC mechanism; (2) the reduced trapping-center density, high carrier mobility, and increased extraction and separation efficient of election-hole pairs of PeNCs; (3) localized surface plasmon enhancement. Our findings open the exciting potential for developing the next-generation narrow NIRPDs. Graphical abstract: Schematic illustration of electron injection process of CsPbF3 : Zn 2+ - Yb 3+ - Er 3+ PeNCs for NIRPDs. Image 1 Highlights: Herein, we theoretically and experimentally demonstrate a novel class of sensitive filterless NIRPDs in CsPbF3 : Zn 2+ -Yb 3+ - Tm 3+ (or Er 3+ ) perovskite nanocrystals (PeNCs)/Au nanorods (NRs) array hybrid via direct photon-electric upconverion (UC) from ground state of Yb 3+ - Tm 3+ (or Er 3+ ) to conduction band of PeNCs. It shows the selectively spectral photodetection at 980-nm NIR region with all full-width at half-maximum of 20 nm, high responsivity of 106 A/W, detectivity of 1.52 × 10 12 Jones, and external quantum efficiency of 135%. The excellent performance can be mainly ascribed to (1) direct photon-electric UC mechanism; (2) the reduced trapping-center density, high carrier mobility, and increased extraction and separation efficient of election-hole pairs of PeNCs; (3) localized surface plasmon enhancement. This work is of general interests to researchers working in perovskite nanocrystals, upconversion luminescence materials, solar energy harvesting, photodetectors.