Photothermal-assist enhanced high-performance self-powered photodetector with bioinspired temperature-autoregulation by passive radiative balance. (January 2021)

• Record Type: Journal Article
• Authors: Tian, Junlong; Chen, Lulu; Qiao, Ruyi; Xiong, Kai; Zhang, Wang; Mao, Yuliang; Li, Hongxing; Li, Jiabin
• Is Part Of: Nano energy. Volume 79(2021)
• Publication Date: 2021-01
• Subjects: Broadband photodetectors -- Photothermal-assist -- Temperature autoregulation -- Passive radiative balance -- Self-powered; 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.2020.105435
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: High broadband absorption with low angular dependence is one of the key factors for photoelectronic applications. Photo-heating accelerating carrier transfer, inducing a change in electrical conductance and exciting "hot" electrons promotes a photoelectric response and extends the response photon energies well below the semiconductor band edge. A photodetector requires cooling to prevent overheating and reduce thermal noise, thereby improving photoelectric detection. Here, these distinct, independent functions, especially the conflicting functions between photo-heating and cooling, are combined into the same structure for the first time. We present an innovative approach using a layered MoS2 /nonlayered CdS/Au hybrid heterostructure integrated into a bioinspired sophisticated micro/nanoarchitecture with omnidirectional light-harvesting, effective photothermal conversion and temperature auto-regulation nature to design a self-powered room-temperature photodetector for low angle-dependence and photothermal-assisted broadband photoelectric detection without active cooling. In nearly active areas with a square micron scale, our photodetector attains a responsivity up to 132.06, 122.46 and 74.44 mA/W under an illumination of 660, 808 and 980 nm, respectively, operated under a low bias (0.5 V), which shows a significant advantage over the reported high-performance MoS2 heterostructure photodetectors. Our work shows the concept that photo-heating can be used to enhance photoelectric detection by passive radiative balance. Thus, this work offers a new way to design a novel broadband room-temperature optoelectronic detector that outperforms conventional photodetectors, enabling new technological capabilities. Graphical Abstract: ga1 Highlights: The conflicting functions between photo-heating and cooling, are combined into the same structure for the first time. This work overcomes the challenge that photothermal-assist enhance photoelectric application. Performance of self-powered room-temperature photodetector is greatly enhanced by coupling photothermal effect and hot carrier generation.