S, N co-doped graphene quantum dots decorated ZnO nanorods for “Green” quantum dot sensitized solar cells

2019 ◽  
Author(s):  
Tanmoy Majumder ◽  
Saurab Dhar ◽  
Pinak Chakraborty ◽  
Suvra Prakash Mondal
2017 ◽  
Vol 9 (9) ◽  
pp. 1616-1625 ◽  
Author(s):  
Amirhossein Hasani ◽  
Jaber Nasrollah Gavgani ◽  
Reza Mohammadi Pashaki ◽  
Siamak Baseghi ◽  
Alireza Salehi ◽  
...  

RSC Advances ◽  
2020 ◽  
Vol 10 (50) ◽  
pp. 29633-29641
Author(s):  
Soumadri Samanta ◽  
Sunil Kumar ◽  
V. R. Battula ◽  
Arpna Jaryal ◽  
Neha Sardana ◽  
...  

A polymeric O-linked heptazine polymer (OLHP) decorated with S, N co-doped graphene quantum dots (S,N-GQDs) as a photosensitizer to utilize visible light (λ > 420 nm) for hydrogen generation.


NANO ◽  
2019 ◽  
Vol 14 (01) ◽  
pp. 1950012 ◽  
Author(s):  
Tanmoy Majumder ◽  
Saurab Dhar ◽  
Pinak Chakraborty ◽  
Kamalesh Debnath ◽  
Suvra Prakash Mondal

Sulfur and nitrogen co-doped graphene quantum dots (SNGQDs) were synthesized using a hydrothermal method. The doping of S, N atoms and chemical bonding in SNGQDs has been investigated by XPS measurements. Our as-grown SNGQDs showed strong UV (wavelength [Formula: see text]261–341[Formula: see text]nm) and visible absorption (wavelength [Formula: see text]261–341[Formula: see text]nm) and demonstrated excitation-dependent photoemission in visible spectrum. Photoelectrochemical and photovoltaic properties of SNGQDs sensitized carbon-doped ZnO nanotaper (C-ZnO NT) photoanodes has been studied in detail. SNGQD sensitized photoanodes demonstrated superior photoconversion efficiency ([Formula: see text]1.46% and incident-photon-to-current conversion efficiency (IPCE) [Formula: see text]92.48% at 340[Formula: see text]nm. Quantum dot sensitized solar cells (QDSSCs) has been fabricated using SNGQDs sensitized C-ZnO NT photoandoes and demonstrated maximum power conversion efficiency ([Formula: see text]0.59%.


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