TY - JOUR
T1 - Contact printing of compositionally graded CdS xSe 1-x nanowire parallel arrays for tunable photodetectors
AU - Takahashi, Toshitake
AU - Nichols, Patricia
AU - Takei, Kuniharu
AU - Ford, Alexandra C.
AU - Jamshidi, Arash
AU - Wu, Ming C.
AU - Ning, Cun-Zheng
AU - Javey, Ali
PY - 2012/2/3
Y1 - 2012/2/3
N2 - Spatially composition-graded CdS xSe 1x (x=01) nanowires are grown and transferred as parallel arrays onto Si/SiO 2 substrates by a one-step, directional contact printing process. Upon subsequent device fabrication, an array of tunable-wavelength photodetectors is demonstrated. From the spectral photoconductivity measurements, the cutoff wavelength for the device array, as determined by the bandgap, is shown to cover a significant portion of the visible spectrum. The ability to transfer a collection of crystalline semiconductor nanowires while preserving the spatially graded composition may enable a wide range of applications, such as tunable lasers and photodetectors, efficient photovoltaics, and multiplexed chemical sensors.
AB - Spatially composition-graded CdS xSe 1x (x=01) nanowires are grown and transferred as parallel arrays onto Si/SiO 2 substrates by a one-step, directional contact printing process. Upon subsequent device fabrication, an array of tunable-wavelength photodetectors is demonstrated. From the spectral photoconductivity measurements, the cutoff wavelength for the device array, as determined by the bandgap, is shown to cover a significant portion of the visible spectrum. The ability to transfer a collection of crystalline semiconductor nanowires while preserving the spatially graded composition may enable a wide range of applications, such as tunable lasers and photodetectors, efficient photovoltaics, and multiplexed chemical sensors.
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U2 - 10.1088/0957-4484/23/4/045201
DO - 10.1088/0957-4484/23/4/045201
M3 - Article
C2 - 22222254
AN - SCOPUS:84862907861
SN - 0957-4484
VL - 23
JO - Nanotechnology
JF - Nanotechnology
IS - 4
M1 - 045201
ER -