Application of nitrogen-doped TiO2 nano-tubes in dye-sensitized solar cells

http://repository.vnu.edu.vn/handle/VNU_123/28153



Our research aimed to improve the overall energy conversion efficiency of DSCs by applying nitrogen-doped TiO2 nano-tubes (N-TNT) for the preparation of DSCs photo-anodes.
The none-doped TiO2 nano-tubes (TNTs) were synthesized by alkaline hydrothermal treatment of Degussa P25 TiO2 particles in 10M NaOH.
The nanotubes were N-doped by reflux in various concentrations of NH4NO3.
The effects of nitrogen doping on the structure, morphology, and crystallography of N-TNT were analyzed by transmission electron microscopy (TEM), infrared spectroscopy (IR), Raman spectroscopy, and X-ray photoelectron spectra (XPS).
DSCs fabricated with doped N-TNT and TNT was characterized by J-V measurements.
Results showed that nitrogen doping significantly enhanced the efficiency of N-TNT cells, reaching the optimum value (η = 7.36%) with 2M nitrogen dopant, compared to η = 4.75% of TNT cells.
The high efficiency of the N-TNT cells was attributed to increased current density due to the reduction of dark current in the DSCs.


Title: Application of nitrogen-doped TiO2 nano-tubes in dye-sensitized solar cells
Authors: Tran Vy Anh
Trieu Thinh Truong
Pham Phan Thu Anh
Nguyen Trang Ngoc
Le Tien Khoa
Keywords: Dye-sensitized solar cell
TiO2 nano-tubes
N-doped TiO2
TiO2 surface modification
dark current
Issue Date: 2017
Publisher: ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Citation: ISIKNOWLEDGE
Abstract: Our research aimed to improve the overall energy conversion efficiency of DSCs by applying nitrogen-doped TiO2 nano-tubes (N-TNT) for the preparation of DSCs photo-anodes. The none-doped TiO2 nano-tubes (TNTs) were synthesized by alkaline hydrothermal treatment of Degussa P25 TiO2 particles in 10M NaOH. The nanotubes were N-doped by reflux in various concentrations of NH4NO3. The effects of nitrogen doping on the structure, morphology, and crystallography of N-TNT were analyzed by transmission electron microscopy (TEM), infrared spectroscopy (IR), Raman spectroscopy, and X-ray photoelectron spectra (XPS). DSCs fabricated with doped N-TNT and TNT was characterized by J-V measurements. Results showed that nitrogen doping significantly enhanced the efficiency of N-TNT cells, reaching the optimum value (η = 7.36%) with 2M nitrogen dopant, compared to η = 4.75% of TNT cells. The high efficiency of the N-TNT cells was attributed to increased current density due to the reduction of dark current in the DSCs.
Description: TNS06970 ; APPLIED SURFACE SCIENCE Volume: 399 Pages: 515-522 Published: MAR 31 2017
URI: http://repository.vnu.edu.vn/handle/VNU_123/28153
0169-4332
http://www.sciencedirect.com/science/article/pii/S0169433216328537
ISSN: 1873-5584
Appears in Collections:Bài báo của ĐHQGHN trong Web of Science




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