Piezo-phototronic effect for enhanced sensitivity and response range of ZnO thin film flexible UV photodetectors

2019 ◽  
Vol 125 (2) ◽  
pp. 024502 ◽  
Author(s):  
Wei Zhang ◽  
Dayong Jiang ◽  
Man Zhao ◽  
Yuhan Duan ◽  
Xuan Zhou ◽  
...  
Keyword(s):  
Thin Film ◽  
Zno Thin Film ◽  
Uv Photodetectors ◽  
Enhanced Sensitivity ◽  
Response Range

An efficient urea biosensor based on laser ablated ZnO thin film

2013 ◽  
Vol 1530 ◽  
Author(s):  
Neha Batra ◽  
Monika Tomar ◽  
Vinay Gupta
Keyword(s):  
Thin Film ◽  
Indium Tin Oxide ◽  
High Electron ◽  
Zno Thin Film ◽  
Detection Range ◽  
Response Characteristics ◽  
Glass Substrates ◽  
Enhanced Sensitivity ◽  
Ito Glass ◽  
The Matrix

ABSTRACTZinc oxide (ZnO) thin film deposited onto indium tin oxide (ITO) coated Corning glass substrates using pulsed laser deposition (PLD) technique has been used as a matrix for realization of an efficient urea biosensor after immobilization of urease (Urs) enzyme onto the surface of ZnO. The bioelectrode (Urs/ZnO/ITO/glass) is found to be exhibiting an enhanced sensitivity of 22μΑmΜ−1cm−2 towards urea over a wide detection range of 5-200 mg/dl. The relatively low value of Michaelis menten constant (Km= 0.94mM) indicates high affinity of the immobilized urease towards the analyte (urea). The prepared biosensor retains 90% of its activity for more than 10 weeks. The observed enhanced response characteristics of bioelectrode are attributed to the growth of the matrix (highly c-axis oriented ZnO thin film) with desired surface morphology and high electron communication feature. The results confirm the promising application of PLD grown ZnO thin film as an efficient matrix for urea detection.

Improved responsivity of highly reproducible performance ZnO thin film flexible UV photodetectors by piezo-phototronic effect

2019 ◽  
Vol 30 (16) ◽  
pp. 15198-15205 ◽  
Author(s):  
Chuncai Shan ◽  
Man Zhao ◽  
Dayong Jiang ◽  
Jiamei Sun ◽  
Yuhan Duan ◽  
...  
Keyword(s):  
Thin Film ◽  
Zno Thin Film ◽  
Uv Photodetectors

scholarly journals ELECTRICAL AND OPTICAL EFFECTS OF Ag DOPANT ON ZnO THIN FILM BASED MSM UV PHOTODETECTORS

2018 ◽  
Vol 2018 (04) ◽  
pp. 124-142 ◽  
Author(s):  
Mohammed Wesam Naji ◽  
◽  
Ghusoon Mohsin Ali ◽  
Muneer Aboud Hashem ◽  
◽  
...  
Keyword(s):  
Thin Film ◽  
Zno Thin Film ◽  
Uv Photodetectors ◽  
Optical Effects

Multifunctional zinc oxide thin films for high-performance UV photodetectors and nitrogen dioxide gas sensors

RSC Advances ◽  
2016 ◽  
Vol 6 (31) ◽  
pp. 25641-25650 ◽  
Author(s):  
S. K. Shaikh ◽  
V. V. Ganbavle ◽  
S. I. Inamdar ◽  
K. Y. Rajpure
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Zinc Oxide ◽  
Nitrogen Dioxide ◽  
Gas Sensor ◽  
Gas Sensors ◽  
High Performance ◽  
Zno Thin Film ◽  
Uv Photodetector ◽  
Uv Photodetectors

Multifunctional use of ZnO thin film as NO2 gas sensor and UV photodetector.

Surface plasmon optical sensor with enhanced sensitivity using top ZnO thin film

2012 ◽  
Vol 107 (2) ◽  
pp. 279-283 ◽  
Author(s):  
Ming Bao ◽  
Ge Li ◽  
Dongmei Jiang ◽  
Wenjuan Cheng ◽  
Xueming Ma
Keyword(s):  
Thin Film ◽  
Surface Plasmon ◽  
Optical Sensor ◽  
Zno Thin Film ◽  
Enhanced Sensitivity

Plasmonic Enhancement of Optical Absorption of UV Radiation in ZnO Thin Film Based Ultraviolet Photodetectors

2013 ◽  
Vol 1509 ◽  
Author(s):  
Akshta Rajan ◽  
Ayushi Paliwal ◽  
Vinay Gupta ◽  
Monika Tomar
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Optical Absorption ◽  
Film Surface ◽  
Zno Thin Films ◽  
Zno Thin Film ◽  
Plasmonic Enhancement ◽  
Ag Nps ◽  
Uv Photodetectors ◽  
Photoconductive Gain

ABSTRACTUltraviolet (UV) photoconductivity in pure ZnO thin films and metal (Ag, Au, Pt) nanoparticles (NPs) dispersed on ZnO thin films based UV photodetectors biased at 5 V for ultra violet radiation of λ = 365 nm and intensity = 24 µwatt/cm2 has been studied. All the three metal (Ag, Au, Pt) NPs synthesized by Polyol process when dispersed on the surface of 100 nm thin ZnO film results in enhanced photoconductive gain (K) in comparison to pure ZnO (3.1×103). An increase of about an order in K has been obtained in the case of Ag NPs/ZnO and Au NPs/ZnO UV photodetectors ( K = 6.9×104 and 5.3×104 respectively). On the other hand, Pt NPs enhance K by about two orders (5.0×105). Such an enhanced photoconductive gain has been achieved due to the lowering of dark current after dispersing the metal NPs on the surface of ZnO and increased photocurrent upon UV illumination. This may be attributed to the plasmon propagating property in metal NPs which enhances the light trapping through optical absorption in ZnO thin film surface (high photo current).

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