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Li M, Wu C, Chen M, Weng T, Yu X, Lin K, Cao Y, Yu X, Li Z, Qiao Q, Zhang H, Zhou Y. Dipole Field-Driven Organic-Inorganic Heterojunction for Highly Sensitive Ultraviolet Photodetector. ACS Appl Mater Interfaces 2024. [PMID: 38382473 DOI: 10.1021/acsami.3c16985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Developing high-performance organic-inorganic ultraviolet (UV) photodetectors (PDs) has attracted considerable attention. However, this development has been hindered due to poor directional charge-transfer ratios in transport layers, excessive costs, and an ambiguous underlying mechanism. To tackle these challenges, we constructed a heterojunction of economic Mg-doped ZnO (MgZnO) nanorods and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) [PEDOT:PSS (P:P)] that utilizes dipole field-driven spontaneous polarization to enhance photogenerated charge kinetics. As a result, the proposed heterojunction has an improved noise equivalent power of 3.16 × 10-11 W Hz-1/2), a normalized detection rate (D*) of 8.96 × 109 jones, and external quantum efficiency comparable to other ZnO-based devices. Notably, the prepared PDs showed a photocurrent of 4.8 × 10-3 μA under a faint UV light having an intensity of 1 × 10-5 W cm-2, exceeding the performance of the most state-of-the-art ZnO-based UV sensors. The introduction of Mg into ZnO is responsible for the high performance, as it causes a lattice mismatch and distortion of the Mg-doped ZnO unit cell. It results in improved dipole movement and the creation of a dipole field, accelerating the directional electron-transfer process. Using a dipole field to manipulate the migration and transport of photogenerated carriers represents a promising approach for achieving outstanding performance in UV PDs.
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Affiliation(s)
- Minghao Li
- School of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Cheng Wu
- School of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Mengshan Chen
- National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Tianfeng Weng
- School of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Xuan Yu
- School of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
- National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Kun Lin
- School of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Yu Cao
- School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China
| | - Xiaoming Yu
- School of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
- National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Zhenhua Li
- School of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Qian Qiao
- School of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Hai Zhang
- School of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Yingtang Zhou
- National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Marine Science and Technology College, Zhejiang Ocean University, Zhoushan, Zhejiang 316004, China
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