Detectors currently used for UV detection are Si based and photomultiplier tubes, but these are bulky and less sensitive.
ZnO based detector is an alternative to silicon and photomultiplier tubes due to its high sensitivity to UV light and can be
fabricated cheaply and compactly. Here we attempt to increase the sensitivity of ZnO based detector by using electrode
design that resembles a Wheatstone bridge and the detector has metal-semiconductor-metal structure. This new
improved design enhances the collection of carriers and also miniaturization of the detector. The nanorods for the
detector were grown by solution growth technique and the response of the detector on the length of the interdigitated
fingers and spacing between the interdigitated fingers were also studied.49518
The paper presents the creation of well aligned, vertically oriented, single crystal, high aspect ratio zinc oxide nanorods
(ZnO NRs) for the purpose of gas detection in a chip based sensor. It is hypothesized that the best sensor functionality
will be observed when the ZnO NRs are uniform and well controlled in their growth. The resulting process will
maximize aspect ratio and attempt to find an optimal NR density for surface gas absorption.
Solar cells currently used are silicon based because they have higher efficiency than cells from other materials, but the
manufacturing cost is high. Though, cheaper cells can be fabricated using organic materials because it solution
processable, the efficiency is very low. Hybrid solar cells have improved the efficiency of organic solar cells. Hybrid
solar cells with ZnO nanorods as the inorganic and P3HT (poly 3-hexylthiophene) and PCBM ((6, 6)-phenyl C61 butyric
acid methyl ester) as the active layer reported in literature is usually prepared by spin coating. The major drawback of
using spin coating technique is that large area fabrication is not possible and material wastage makes this technique
uneconomical. Large scale production is feasible if these cells can be prepared by spray coating. Here we will discuss the
fabrication and characterization of hybrid solar cells by spray coating technique.
ZnO nano rods were grown by aqueous chemical growth technique over ZnO seeds in mesh form deposited on ITO
coated glass substrate. The structural and morphological analysis of the seed layer and the nano rods were studied, both
the seed and the nano rods are crystalline in nature and majority of the planes are oriented along the C-axis. Over the
nano rods layer P3HT (poly 3-hexylthiophene)/PCBM ((6, 6)-phenyl C61 butyric acid methyl ester) blend, PEDOT: PSS
(Poly ethylenedioxythiophene doped with poly styrene sulphonic acid) were successively spin coated and Gold was
coated as the top electrode by electron beam evaporation. The Current (I) vs. Voltage (V) characteristics of the device
was measured without illumination and with illumination. The device showed an ohmic behavior instead of rectifying
behavior.
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