Hybrid Device Architecture Using Plasmonic Nanoparticles, Graphene Quantum Dots, and Titanium Dioxide for UV Photodetectors

2021 ◽  
Author(s):  
Sundar Kunwar ◽  
Sanchaya Pandit ◽  
Rakesh Kulkarni ◽  
Rutuja Mandavkar ◽  
Shusen Lin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Titanium Dioxide ◽  
Graphene Quantum Dots ◽  
Plasmonic Nanoparticles ◽  
Uv Photodetectors ◽  
Hybrid Device ◽  
Device Architecture

Tuning Enhancement Efficiency of Multiple Emissive Centers in Graphene Quantum Dots by Core–Shell Plasmonic Nanoparticles

2017 ◽  
Vol 8 (22) ◽  
pp. 5673-5679 ◽  
Author(s):  
Shujun Wang ◽  
Ashleigh Clapper ◽  
Peng Chen ◽  
Lianzhou Wang ◽  
Igor Aharonovich ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Plasmonic Nanoparticles ◽  
Core Shell

N-doped graphene quantum dots-functionalized titanium dioxide nanofibers and their highly efficient photocurrent response

2014 ◽  
Vol 29 (13) ◽  
pp. 1408-1416 ◽  
Author(s):  
Xiaotian Wang ◽  
Dandan Ling ◽  
Yueming Wang ◽  
Huan Long ◽  
Yibai Sun ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Titanium Dioxide ◽  
Graphene Quantum Dots ◽  
Photocurrent Response ◽  
Highly Efficient ◽  
Doped Graphene ◽  
Image Position

Abstract

Facile preparation of sulphur-doped graphene quantum dots for ultra-high performance ultraviolet photodetectors

2017 ◽  
Vol 41 (18) ◽  
pp. 10447-10451 ◽  
Author(s):  
Shuxiong Gao ◽  
Libin Tang ◽  
Jinzhong Xiang ◽  
Rongbin Ji ◽  
Sin Ki Lai ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Graphene Quantum Dots ◽  
Combustion Method ◽  
Uv Photodetectors ◽  
Doped Graphene ◽  
Facile Preparation ◽  
Ultraviolet Photodetectors

Sulphur-doped GQDs were prepared using a novel co-combustion method (T-X-J method), and ultra-high performance UV photodetectors based on S-GQDs were fabricated.

scholarly journals Application of doping graphene quantum dots and gold nanoparticles on dye-sensitized solar cells

2021 ◽  
Author(s):  
Kao-Wei Min ◽  
Ming-Ta Yu ◽  
Chi-Ting Ho ◽  
Pin-Ru Chen ◽  
Jenn-Kai Tsai ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Titanium Dioxide ◽  
Graphene Quantum Dots ◽  
Dye Sensitized Solar Cells ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Dye Sensitized ◽  
Layer Graphene ◽  
Photogenerated Electrons ◽  
Sensitized Solar Cells

The doctor blade coating method is used to prepare dye-sensitized solar cells (DSSCs) and dope the original titanium dioxide (TiO2, P25) photoanode (PA) with single-layer graphene (G), graphene quantum dots (GQDs), and gold (Au) nanoparticles in this research. The results show that doping PAs with G, GQDS, and Au effectively increases the short-circuit current density [Formula: see text], conversion efficiency [Formula: see text], and decreases the internal structure impedance [Formula: see text] of DSSCs. [Formula: see text] increases from 13.62 to 17.02, 15.22, 16.05 mA/cm2, while [Formula: see text] (%) increases from 6.36 to 7.50, 7.08, 7.04% when doping G, GQDs, and Au, respectively. The analysis of Electrochemical Impedance Spectroscopy (EIS) reveals that the doping decreases [Formula: see text] from 11.28 to 8.36, 8.78, 8.54 [Formula: see text], respectively. Then, the titanium dioxide (TiO2)-doped G-GQDs, G-Au, and QDs-Au on DSSCs influence [Formula: see text] that increases to 5.45, 15.37, and 15.31 mA/cm2, respectively. In this case, the values of [Formula: see text] are found to be 7.21%, 7.35%, and 7.00%, while those of [Formula: see text] are 8.44, 8.63, and 9.18 [Formula: see text]. The values of [Formula: see text] and [Formula: see text] are highest but that of [Formula: see text] are lowest when doping with G, which proves that the photoanode of the DSSC effectively activates the photogenerated electrons in the film by doping single-layer graphene and TiO2 captures its electrons through graphene. The decreasing electron–hole recombination rate allows the photogenerated electrons to be quickly transferred to the external circuit. As a result, the efficiency of DSSCs is improved.

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