TY - JOUR
T1 - Photoconductive enhancement of single ZnO nanowire through localized Schottky effects
AU - Chen, Ming-Wei
AU - Chen, Cheng-Ying
AU - Lien, Der-Hsien
AU - Ding, Yong
AU - He, Jr-Hau
PY - 2010/7/5
Y1 - 2010/7/5
N2 - We demonstrated the Au nanoparticle (NP) decoration as an effective way to enhance both photocurrent and photoconductive gain of single ZnO nanowire (NW) photodetectors (PDs) through localized Schottky effects. The enhancement is caused by the enhanced space charge effect due to the existence of the localized Schottky junctions under opencircuit conditions at the NW surfaces, leading to a more pronounced electron-hole separation effect. Since the band-bending under illumination varies relatively small for an Au NP-decorated ZnO NW, the decay of gain is less prominent with increased excitation power, demonstrating the feasibility for a PD to maintain a high gain under high-power illumination.
AB - We demonstrated the Au nanoparticle (NP) decoration as an effective way to enhance both photocurrent and photoconductive gain of single ZnO nanowire (NW) photodetectors (PDs) through localized Schottky effects. The enhancement is caused by the enhanced space charge effect due to the existence of the localized Schottky junctions under opencircuit conditions at the NW surfaces, leading to a more pronounced electron-hole separation effect. Since the band-bending under illumination varies relatively small for an Au NP-decorated ZnO NW, the decay of gain is less prominent with increased excitation power, demonstrating the feasibility for a PD to maintain a high gain under high-power illumination.
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U2 - 10.1364/OE.18.014836
DO - 10.1364/OE.18.014836
M3 - RGC 21 - Publication in refereed journal
SN - 1094-4087
VL - 18
SP - 14836
EP - 14841
JO - Optics Express
JF - Optics Express
IS - 14
ER -