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Search Results (3)

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Keywords = pyro–piezo-phototronic effects

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20 pages, 3229 KB  
Article
Pyro-Phototronic Effect Enhanced MXene/ZnO Heterojunction Nanogenerator for Light Energy Harvesting
by Mingyan Xue, Fangpei Li, Wenbo Peng, Quanzhe Zhu and Yongning He
Nanoenergy Adv. 2023, 3(4), 401-420; https://doi.org/10.3390/nanoenergyadv3040020 - 4 Dec 2023
Cited by 13 | Viewed by 3498
Abstract
The coupling of pyroelectricity, semiconductor, and optical excitation yields the pyro-phototronic effect, which has been extensively utilized in photodetectors. It can also enhance the performance of light energy harvesting nanogenerators. In this work, a pyro-phototronic effect-enhanced MXene/ZnO heterojunction nanogenerator has been successfully demonstrated, [...] Read more.
The coupling of pyroelectricity, semiconductor, and optical excitation yields the pyro-phototronic effect, which has been extensively utilized in photodetectors. It can also enhance the performance of light energy harvesting nanogenerators. In this work, a pyro-phototronic effect-enhanced MXene/ZnO heterojunction nanogenerator has been successfully demonstrated, which can harvest broadband light energy (from deep UV to near-infrared) and still operate at 200 °C. The morphology of the ZnO layer and the MXene layer’s thickness have been further optimized for better light energy harvesting performance. For the optimized heterojunction nanogenerator, the responsivity can be improved from ~0.2 mA/W to ~3.5 mA/W by pyro-phototronic effect, under 0.0974 mW/cm2 365 nm UV illumination. Moreover, the coupling of pyro-phototronic and piezo-phototronic effects in MXene/ZnO heterojunction nanogenerators has been investigated. The results indicate that only a small tensile strain could improve the nanogenerator’s performance. The working mechanisms have been carefully analyzed, and the modulation of piezoelectric charges on the Schottky barrier height is found to be the key factor. These results demonstrate the enormous potential of the pyro-phototronic effect in light energy harvesting nanogenerators and illustrate the coupling of pyro-phototronic and piezo-phototronic effects for further performance improvement. Full article
(This article belongs to the Special Issue Celebrating the 18th Anniversary of the Invention of the First Nanogenerators)
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9 pages, 13222 KB  
Communication
Coupling of Pyro–Piezo-Phototronic Effects in a GaN Nanowire
by Guoshuai Qin, Zhenyu Wang, Lei Wang, Kun Yang, Minghao Zhao and Chunsheng Lu
Materials 2023, 16(18), 6247; https://doi.org/10.3390/ma16186247 - 17 Sep 2023
Cited by 3 | Viewed by 2335
Abstract
In this paper, we systematically investigate the synergistic regulation of ultraviolet and mechanical loading on the electromechanical behavior of a GaN nanowire. The distributions of polarization charge, potential, carriers, and electric field in the GaN nanowire are analytically represented by using a one-dimensional [...] Read more.
In this paper, we systematically investigate the synergistic regulation of ultraviolet and mechanical loading on the electromechanical behavior of a GaN nanowire. The distributions of polarization charge, potential, carriers, and electric field in the GaN nanowire are analytically represented by using a one-dimensional model that combines pyro-phototronic and piezo-phototronic properties, and then, the electrical transmission characteristics are analyzed. The results suggest that, due to the pyro-phototronic effect and ultraviolet photoexcited non-equilibrium carriers, the electrical behavior of a nano-Schottky junction can be modulate by ultraviolet light. This provides a new method for the function improvement and performance regulation of intelligent optoelectronic nano-Schottky devices. Full article
(This article belongs to the Special Issue Piezoelectric Nanofibers: Recent Development, Challenges, and Applications)
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35 pages, 14831 KB  
Review
Pyro-Phototronic Effect for Advanced Photodetectors and Novel Light Energy Harvesting
by Fangpei Li, Wenbo Peng, Yitong Wang, Mingyan Xue and Yongning He
Nanomaterials 2023, 13(8), 1336; https://doi.org/10.3390/nano13081336 - 11 Apr 2023
Cited by 17 | Viewed by 5143
Abstract
Pyroelectricity was discovered long ago and utilized to convert thermal energy that is tiny and usually wasted in daily life into useful electrical energy. The combination of pyroelectricity and optoelectronic yields a novel research field named as Pyro-Phototronic, where light-induced temperature variation [...] Read more.
Pyroelectricity was discovered long ago and utilized to convert thermal energy that is tiny and usually wasted in daily life into useful electrical energy. The combination of pyroelectricity and optoelectronic yields a novel research field named as Pyro-Phototronic, where light-induced temperature variation of the pyroelectric material produces pyroelectric polarization charges at the interfaces of semiconductor optoelectronic devices, capable of modulating the device performances. In recent years, the pyro-phototronic effect has been vastly adopted and presents huge potential applications in functional optoelectronic devices. Here, we first introduce the basic concept and working mechanism of the pyro-phototronic effect and next summarize the recent progress of the pyro-phototronic effect in advanced photodetectors and light energy harvesting based on diverse materials with different dimensions. The coupling between the pyro-phototronic effect and the piezo-phototronic effect has also been reviewed. This review provides a comprehensive and conceptual summary of the pyro-phototronic effect and perspectives for pyro-phototronic-effect-based potential applications. Full article
(This article belongs to the Special Issue Low-Dimensional Semiconductor Nanomaterials: Preparation, Characterization, and Application)
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