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Nanogenerators: Optimization of the Output Efficiency of GaN Nanowire Piezoelectric Nanogenerators by Tuning the Free Carrier Concentration (Adv. Energy Mater. 16/2014)
Author(s) -
Wang ChaoHung,
Liao WeiShun,
Lin ZongHong,
Ku NaiJen,
Li YiChang,
Chen YenChih,
Wang ZhongLin,
Liu ChuanPu
Publication year - 2014
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201470085
Subject(s) - materials science , piezoelectricity , nanowire , doping , nanogenerator , voltage , optoelectronics , nanotechnology , current (fluid) , current density , electrical engineering , composite material , physics , quantum mechanics , engineering
In article number 1400392, Chuan‐Pu Liu and co‐workers report the synthesis of Si‐doped GaN nanowire arrays with various carrier concentrations to investigate the impact of carrier screening on the output performance of alternating‐current (AC) vertical integrated nanogenerators (VINGs). The output voltage and current density of AC VINGs strongly decrease with increasing doping concentration. Consequently, AC VINGs can be optimized if they are composed of piezotronic materials with the lowest possible carrier concentration to prevent the screening effect.