+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

The importance of the TiO2/quantum dots interface in the recombination processes of quantum dot sensitized solar cells

The importance of the TiO2/quantum dots interface in the recombination processes of quantum dot sensitized solar cells

Physical Chemistry Chemical Physics 15(11): 3841-3845

Quantum dot sensitized solar cells (QDSSCs) present a promising technology for next generation photovoltaic cells, having exhibited a considerable leap in performance over the last few years. However, recombination processes occurring in parallel at the TiO(2)-QDs-electrolyte triple junction constitute one of the major limitations for further improvement of QDSSCs. Reaching higher conversion efficiencies necessitates gaining a better understanding of the mechanisms of charge recombination in these kinds of cells; this will essentially lead to the development of new solutions for inhibiting the described losses. In this study we have systematically examined the contribution of each interface formed at the triple junction to the recombination of the solar cell. We show that the recombination of electrons at the TiO(2)/QDs interface is as important as the recombination from TiO(2) and QDs to the electrolyte. By applying conformal MgO coating both above and below the QD surface, recombination rates were significantly reduced, and an improvement of more than 20% in cell efficiency was recorded.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 056375262

Download citation: RISBibTeXText

PMID: 23400262

DOI: 10.1039/c3cp44719g

Related references

Aqueous-phase linker-assisted attachment of cysteinate(2-)-capped cdse quantum dots to TiO2 for quantum dot-sensitized solar cells. Acs Applied Materials and Interfaces 5(17): 8649-8654, 2014

Improving the performance of quantum dot sensitized solar cells through CdNiS quantum dots with reduced recombination and enhanced electron lifetime. Dalton Transactions 45(20): 8447-8457, 2016

Enhanced light absorption and charge recombination control in quantum dot sensitized solar cells using tin doped cadmium sulfide quantum dots. Journal of Colloid and Interface Science 534: 291-300, 2018

Nanocrystalline TiO2 solar cells sensitized with InAs quantum dots. Journal of Physical Chemistry. B 110(50): 25451-4, 2006

CdSCdSe (CdTe) coreshell quantum dots sensitized TiO2 nanotube array solar cells. Solar Energy Materials and Solar Cells 132: 650-654, 2015

Recombination control in high-performance quantum dot-sensitized solar cells with a novel TiO2/ZnS/CdS/ZnS heterostructure. Dalton Transactions 45(32): 12914-12923, 2016

Graphene quantum dots decorated electrospun TiO2 nanofibers as an effective photoanode for dye sensitized solar cells. Solar Energy Materials and Solar Cells 143: 250-259, 2015

CdS quantum dots sensitized solar cells based on free-standing and through-hole TiO2 nanotube arrays. Dalton Transactions 42(41): 14726-14732, 2014

Front-side illuminated CdS/CdSe quantum dots co-sensitized solar cells based on TiO₂ nanotube arrays. Nanotechnology 22(46): 465402, 2011

CdSe quantum dots and N719-dye decorated hierarchical TiO2 nanorods for the construction of efficient co-sensitized solar cells. Chemphyschem 16(12): 2543-2548, 2015

Alloying Strategy in Cu-In-Ga-Se Quantum Dots for High Efficiency Quantum Dot Sensitized Solar Cells. Acs Applied Materials and Interfaces 9(6): 5328-5336, 2017

PbS Quantum Dots Sensitized TiO2 Solar Cells Prepared by Successive Ionic Layer Absorption and Reaction with Different Adsorption Layers. Journal of Nanoscience and Nanotechnology 16(4): 3904-3908, 2016

Quantum dots co-sensitized solar cells: a new assembly process of CdS/CdSe linked to mesoscopic TiO2-nano-SiO2hybrid film. Journal of Sol-Gel Science and Technology 67(3): 458-463, 2013

A Novel Method for the Preparation of CdS Quantum Dots Sensitized Solar Cells Based on Free-Standing and Through-Hole TiO2 Nanotube Arrays. Journal of Nanoscience and Nanotechnology 16(6): 6086-6092, 2016

Improving the Power Conversion Efficiency of Carbon Quantum Dot-Sensitized Solar Cells by Growing the Dots on a TiO₂ Photoanode In Situ. Nanomaterials 7(6), 2017