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High‐Power Density Piezoelectric Energy Harvesting Using Radially Strained Ultrathin Trigonal Tellurium Nanowire Assembly
Author(s) -
Lee Tae Il,
Lee Sangmin,
Lee Eungkyu,
Sohn Sungwoo,
Lee Yean,
Lee Sujeong,
Moon Geondae,
Kim Dohyang,
Kim Youn Sang,
Myoung Jae Min,
Wang Zhong Lin
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201300657
Subject(s) - materials science , piezoelectricity , nanowire , tellurium , nanogenerator , power density , monolayer , energy harvesting , trigonal crystal system , optoelectronics , nanomaterials , nanotechnology , crystal structure , composite material , power (physics) , crystallography , metallurgy , chemistry , physics , quantum mechanics
A high‐yield solution‐processed ultrathin (<10 nm) trigonal tellurium (t‐Te) nanowire (NW) is introduced as a new class of piezoelectric nanomaterial with a six‐fold higher piezoelectric constant compared to conventional ZnO NWs for a high‐volume power‐density nanogenerator (NG). While determining the energy‐harvesting principle in a NG consisting of t‐Te NW, it is theoretically and experimentally found that t‐Te NW is piezoelectrically activated only by creating strain in its radial direction, along which it has an asymmetric crystal structure. Based upon this mechanism, a NG with a monolayer consisting of well‐aligned t‐Te NWs and a power density of 9 mW/cm 3 is fabricated.