NDLI: N-Ion-implanted TiO<sub>2</sub> photoanodes in quantum dot-sensitized solar cells

Content Provider	Royal Society of Chemistry (RSC)
Author	Kang, Yong Soo Ito, E. Asokan, K. Sudhagar, P.
Copyright Year	2012
Abstract	Hierarchical nanostructured titanium dioxide (TiO2) clumps were fabricated using electrostatic spray with subsequent nitrogen-ion doping by an ion-implantation technique for improvement of energy conversion efficiency for quantum dot-sensitized solar cells (QDSCs). CdSe quantum dots were directly assembled on the produced N-ion-implanted TiO2 photoanodes by chemical bath deposition, and their photovoltaic performance was evaluated in a polysulfide electrolyte with a Pt counter electrode. We found that the photovoltaic performance of TiO2 electrodes was improved by nearly 145% upon N-ion implantation. The efficiency improvement seems to be due to (1) the enhancement of electron transport through the TiO2 layer by inter-particle necking of primary TiO2 particles and (2) an increase in the recombination resistance at TiO2/QD/electrolyte interfaces by healing the surface states or managing the oxygen vacancies upon N-ion doping. Therefore, N-ion-doped photoanodes offer a viable pathway to develop more efficient QD or dye-sensitized solar cells.
Starting Page	2416
Ending Page	2422
Page Count	7
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	4
Issue Number	7
Journal	Nanoscale
DOI	10.1039/c2nr11953f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Solar cell Polysulfide Dye-sensitized solar cell Oxygen Electrode Chemical bath deposition Electrolyte Carrier generation and recombination Dopant Titanium dioxide Quantum tunnelling
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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