La-doped p-type ZnO nanowire with enhanced piezoelectric performance for flexible nanogenerators

Kang, Leeseung; An, Hye Lan; Park, Ji Young; Hong, Myung Hwan; Nahm, Sahn; Lee, Chan Gi

doi:10.1016/j.apsusc.2019.01.025

Cited by 46 publications

(20 citation statements)

References 41 publications

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“…p‐Type doping can reduce the shielding effect of the free electrons generated by the dopant in the ZnO nanowires. Metal, [ 125–128 ] rare earth (RE) metal, [ 129–132 ] and nonmetallic elements (such as S ions [ 133 ] and halogen ions [ 119,134 ] ) have been used as dopants to achieve ZnO PENGs with improved piezoelectric properties and high performance. As shown in Figure a, Batra et al.…”

Section: Materials Fabrication and Performance Enhancementmentioning

confidence: 99%

Piezoelectric Nanogenerators Derived Self‐Powered Sensors for Multifunctional Applications and Artificial Intelligence

Cao

Xiong

Sun

et al. 2021

Adv Funct Materials

230

111

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With the arrival of the Internet of Things (IoTs) era, there is a growing requirement for systems with many sensor nodes in a variety of fields of applications. The demands for wireless, sustainable and independent operation are becoming more and more important for large‐scale sensor networks and systems. For these purposes, a self‐powered sensory system that can utilize the self‐harvested energy from its surroundings to drive the sensors and directly sense external stimuli has attracted great attention. The invention and rapid development of piezoelectric generators (PENGs), which take Maxwell's displacement current as the driving force, has been pushing forward research on self‐powered active mechanical sensors, electronic skins, and human‐robotic interaction. Here, this review starts with a brief introduction of piezoelectric materials, fabrication, and performance improvement. Then, the energy harvesters used for self‐power systems based on recent progress are reviewed. After that, PENGs applications toward recent self‐powered active sensors are divided into four aspects and highlighted, respectively. Moreover, some challenges and future directions for the self‐powered multifunctional sensors are put forward. It is believed that through the continuous investigations into PENG‐based self‐powered active sensors, they will soon be used in touch screens, electronic skins, health care, environmental monitoring, and intelligence systems.

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Section: Materials Fabrication and Performance Enhancementmentioning

confidence: 99%

Piezoelectric Nanogenerators Derived Self‐Powered Sensors for Multifunctional Applications and Artificial Intelligence

Cao

Xiong

Sun

et al. 2021

Adv Funct Materials

230

111

View full text Add to dashboard Cite

show abstract

“…However, the piezoelectric coefficient of pristine ZnO is relatively low compared to prevalent piezoelectric ceramics, , so engineering ZnO to improve the piezoelectric performance is essential. Doping with a small number of rare metal elements such as Ce, La, Ho, and Nd can effectively enhance the piezoelectric performances of ZnO (Figure b). − For example, Batra et al conducted doping of Tb 3+ in 0D ZnO nanoparticles using chemical coprecipitation . The piezoelectric output voltage from doped ZnO is 4 times higher than that from pure ZnO nanoparticles .…”

Section: Engineering Of Ld Materials For Improved Piezoelectric Prope...mentioning

confidence: 99%

Enhanced Piezoelectric Properties Enabled by Engineered Low-Dimensional Nanomaterials

Wang

Guo

et al. 2022

ACS Appl. Nano Mater.

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Today's electronic products are moving toward personal, portable, and flexible electronics with the integration of multifunctional sensors and self-powering technologies. Consequently, efficient and highperformance mechanical−electronic interfaces will be heavily considered in the development of future electronics. Piezotronic materials are active components for the conversion of mechanical stimuli to electrical signals and vice versa. In particular, low-dimensional (LD) materials offer greater efficiencies in piezoelectric materials than their bulk counterparts. Piezoelectric LD materials have attracted significant attention because of their successful integration in miniatured and flexible electronics. The origin of the piezoelectric responses of the LD materials is ascribed as a loss of centrosymmetry and inversion center. However, challenges exist in utilizing piezoelectric materials to their full potential, including effective charge separation upon external stimuli and imperfections in their crystal structures. Therefore, considerable efforts have been devoted to engineering the LD piezoelectric materials by rational structural design and chemical modification to further improve the piezoelectric performances. Herein, we comprehensively review the recent advances for engineering technologies of piezoelectric materials on the scale of zero-dimensional (0D), one-dimensional (1D), and two-dimensional (2D), which are mainly focused on creating defects, doping, and forming Janus structures and heterointerfaces with other materials. Meanwhile, the relationships between the morphological, physicochemical, and electronics of engineered LD piezoelectric materials and their piezoelectric performances are systematically discussed. Finally, we further present the prospect and challenge of the field and future research direction, aiming to inspire more research for achieving high-performance LD piezoelectric materials in sensors, actuators, and micro-and nanoelectromechanical systems.

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“…The main peaks at 723.7 and 709.2 eV correspond to the Fe 2p 1/2 and Fe 2p 3/2 electronic orbits of Fe 3+ , respectively, confirming the presence of Fe 3+ ions in the ZnO lattice. 30 The La 3d spectrum is spilled into two doublet peaks by spin−orbit coupling; the peaks at 852.1 and 836.6 eV represent the La 3d 3/2 and La 3d 5/2 , respectively, 31 indicating that La 2 O 3 exists in the ZnO nanorod array.…”

Section: Characterization and Electrical Measurementmentioning

confidence: 99%

Ferroelectric La_xFe_0.1–x Codoped ZnO Nanorod Triboelectric Nanogenerators for Electrochemical Rhodamine B Degradation

Wang

Dai

Pei

et al. 2022

ACS Appl. Nano Mater.

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La x Fe0.1–x codoped ZnO nanorod arrays have been successfully prepared by the simple hydrothermal method, and the concentration ratio of 1:1 of Fe and La endows the codoped ZnO arrays with optimal ferroelectric properties. Then the ferroelectric La0.05Fe0.05 codoped ZnO nonoarrays and polydimethylsiloxane (PDMS) are used as positive and negative friction materials, respectively, to assemble the triboelectric nanogenerators (TENGs). Compared with Fe- or La-doped ZnO positive friction materials, the La0.05Fe0.05 codoped ZnO positive friction layer increases the output current density of TENGs by nearly 10 times, and the TENGs have excellent output stability. Lastly, the La0.05Fe0.05 codoped ZnO/PDMS TENGs have been successfully used for the high-efficient electrocatalytic degradation of RhB in simulated seawater. The work is very beneficial to the development of self-powered electrochemical degradation of organic pollutants in wastewater.

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La-doped p-type ZnO nanowire with enhanced piezoelectric performance for flexible nanogenerators

Cited by 46 publications

References 41 publications

Piezoelectric Nanogenerators Derived Self‐Powered Sensors for Multifunctional Applications and Artificial Intelligence

Piezoelectric Nanogenerators Derived Self‐Powered Sensors for Multifunctional Applications and Artificial Intelligence

Enhanced Piezoelectric Properties Enabled by Engineered Low-Dimensional Nanomaterials

Ferroelectric La_xFe_0.1–x Codoped ZnO Nanorod Triboelectric Nanogenerators for Electrochemical Rhodamine B Degradation

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La-doped p-type ZnO nanowire with enhanced piezoelectric performance for flexible nanogenerators

Cited by 46 publications

References 41 publications

Piezoelectric Nanogenerators Derived Self‐Powered Sensors for Multifunctional Applications and Artificial Intelligence

Piezoelectric Nanogenerators Derived Self‐Powered Sensors for Multifunctional Applications and Artificial Intelligence

Enhanced Piezoelectric Properties Enabled by Engineered Low-Dimensional Nanomaterials

Ferroelectric LaxFe0.1–x Codoped ZnO Nanorod Triboelectric Nanogenerators for Electrochemical Rhodamine B Degradation

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Ferroelectric La_xFe_0.1–x Codoped ZnO Nanorod Triboelectric Nanogenerators for Electrochemical Rhodamine B Degradation