Graphene quantum dots as a green sensitizer for ZnO nanorod based photoanodes
2016 International Conference on Microelectronics, Computing and …, 2016•ieeexplore.ieee.org
Photoelectrochemical properties of ZnO nanorods have been widely investigated due to low
cost, easy synthesis process and high carrier mobility. However, weak photoabsorption in
visible region is the major bottleneck of ZnO for solar cell applications. To improve the
photoelectrochemical behavior, it is necessary to sensitize ZnO nanorods with
semiconductor quantum dots or nanoparticles. To enhance the photoresponse and
photoelectrochemical behaviors graphene quantum dots (GQDs) have been utilized as …
cost, easy synthesis process and high carrier mobility. However, weak photoabsorption in
visible region is the major bottleneck of ZnO for solar cell applications. To improve the
photoelectrochemical behavior, it is necessary to sensitize ZnO nanorods with
semiconductor quantum dots or nanoparticles. To enhance the photoresponse and
photoelectrochemical behaviors graphene quantum dots (GQDs) have been utilized as …
Photoelectrochemical properties of ZnO nanorods have been widely investigated due to low cost, easy synthesis process and high carrier mobility. However, weak photoabsorption in visible region is the major bottleneck of ZnO for solar cell applications. To improve the photoelectrochemical behavior, it is necessary to sensitize ZnO nanorods with semiconductor quantum dots or nanoparticles. To enhance the photoresponse and photoelectrochemical behaviors graphene quantum dots (GQDs) have been utilized as green sensitizer with ZnO nanorods. GQD sensitized ZnO nanorods (GQD/ZnO) demonstrated superior photoconversion efficiency and incident photon to current conversion efficiency (IPCE) compare to pristine ZnO nanorods. GQD sensitized nanorods exhibited better photoelectrochemical properties than pristine ZnO nanorods due to higher photoabsorption and lower interfacial resistance.
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