An ultrafast-response and high-detectivity self-powered perovskite photodetector based on a triazine-derived star-shaped small molecule as a dopant-free hole transporting layer

Shan, Chengwei1; Meng, Fei1; Yu, Jiahao1; Wang, Zhangxia3; Li, Wenhui1; Fan, Dongyu1; Chen, Rui1; Ma, Haibo3; Li, Gongqiang2; Kyaw, Aung Ko Ko1

2021-05-01

10.1039/d1tc01323h

Journal of Materials Chemistry C   影响因子和分区

2050-7526

2050-7534

Organic-inorganic hybrid perovskites (OIHPs) are becoming appealing for photodetectors due to their excellent optoelectronic properties, but the drawbacks of the commonly used interfacial layers in OIHP photodetectors such as the necessity of doping, high cost and stability issues hinder the further development of this technology. Herein, a star-shaped small molecule with a triazine core unit named Triazine-Th-OMeTAD was synthesized and employed as a dopant-free hole transporting layer in an OIHP photodetector. The Triazine-Th-OMeTAD provided a low-trap-density perovskite film, efficient charge extraction and a large electron injection barrier. As a result, the optimized OIHP photodetector with the Triazine-Th-OMeTAD HTL exhibited a low dark current of 1.09 nA cm(-2), a high responsivity of 0.47 A W-1, and a high specific detectivity of over 8.2 x 10(12) Jones at zero bias. Remarkably, a response speed of 18 ns was obtained at a large active area of 11 mm(2). The high-performance OIHP photodetector demonstrated here acts as a promising candidate for low-cost and high-performance near-ultraviolet-visible photodetection, which is applicable in quick frame rate visible imagers, optical communications and many more.

SCI ; EI

英语

第一 ; 通讯

Guangdong Basic and Applied Basic Research Foundation[2020A1515010916] ; Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting[2017KSYS007] ; High-level University Fund[G02236004] ; National Key R&D Program of China[2017YFA0204704] ; National Science Foundation of China[51773091,22075140,61604069] ; Nature Science Foundation of Jiangsu Province[BK20171465] ; Open Project Program of Wuhan National Laboratory for Optoelectronics[2020WNLOKF010]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:000656612700001

ROYAL SOC CHEMISTRY

20212610564845

Dark currents ; Molecules ; Optical communication ; organic-inorganic materials ; Perovskite ; Photons ; Semiconductor doping ; Stars ; Synthesis (chemical) ; Thorium compounds

Minerals:482.2 ; Extraterrestrial Physics and Stellar Phenomena:657.2 ; Electromagnetic Waves in Relation to Various Structures:711.2 ; Semiconducting Materials:712.1 ; Optical Communication Systems:717.1 ; Chemical Reactions:802.2 ; Atomic and Molecular Physics:931.3

Web of Science

1.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Guangdong Univ Key Lab Adv Quantum Dot Displays &, Shenzhen 518055, Peoples R China
2.Nanjing Tech Univ NanjingTech, Inst Adv Mat IAM, 30 South Puzhu Rd, Nanjing 211816, Peoples R China
3.Nanjing Univ, Sch Chem & Chem Engn, Nanjing 210023, Peoples R China

Shan, Chengwei,Meng, Fei,Yu, Jiahao,et al. An ultrafast-response and high-detectivity self-powered perovskite photodetector based on a triazine-derived star-shaped small molecule as a dopant-free hole transporting layer[J]. Journal of Materials Chemistry C,2021,9:7632-7642.

Shan, Chengwei.,Meng, Fei.,Yu, Jiahao.,Wang, Zhangxia.,Li, Wenhui.,...&Kyaw, Aung Ko Ko.(2021).An ultrafast-response and high-detectivity self-powered perovskite photodetector based on a triazine-derived star-shaped small molecule as a dopant-free hole transporting layer.Journal of Materials Chemistry C,9,7632-7642.

Shan, Chengwei,et al."An ultrafast-response and high-detectivity self-powered perovskite photodetector based on a triazine-derived star-shaped small molecule as a dopant-free hole transporting layer".Journal of Materials Chemistry C 9(2021):7632-7642.