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Efficient eco-friendly inverted quantum dot sensitized solar cells
- Source :
- Journal of Materials Chemistry A, Journal of Materials Chemistry A, Royal Society of Chemistry, 2016, 4 (3), pp.827-837. ⟨10.1039/c5ta06769c⟩, Journal of Materials Chemistry A, 2016, 4 (3), pp.827-837. ⟨10.1039/c5ta06769c⟩, Journal of materials chemistry. A, Materials for energy and sustainability, 4(3), 827-837. Royal Society of Chemistry, Journal of Materials Chemistry. A, Materials for Energy and Sustainability
- Publication Year :
- 2016
- Publisher :
- Royal Society of Chemistry (RSC), 2016.
-
Abstract
- Inverted quantum dot sensitized solar cells using non-toxic CuInSxSe2–x nanocrystals deposited on mesoporous NiO demonstrate high hole injection rates of 10–8 s–1 and record efficiencies of 1.25%..<br />Recent progress in quantum dot (QD) sensitized solar cells has demonstrated the possibility of low-cost and efficient photovoltaics. However, the standard device structure based on n-type materials often suffers from slow hole injection rate, which may lead to unbalanced charge transport. We have fabricated efficient p-type (inverted) QD sensitized cells, which combine the advantages of conventional QD cells with p-type dye sensitized configurations. Moreover, p-type QD sensitized cells can be used in highly promising tandem configurations with n-type ones. QDs without toxic Cd and Pb elements and with improved absorption and stability were successfully deposited onto mesoporous NiO electrode showing good coverage and penetration according to morphological analysis. Detailed photophysical charge transfer studies showed that high hole injection rates (108 s–1) observed in such systems are comparable with electron injection in conventional n-type QD assemblies. Inverted solar cells fabricated with various QDs demonstrate excellent power conversion efficiencies of up to 1.25%, which is 4 times higher than the best values for previous inverted QD sensitized cells. Attempts to passivate the surface of the QDs show that traditional methods of reduction of recombination in the QD sensitized cells are not applicable to the inverted architectures.
- Subjects :
- Passivation
Electron-Transfer
Nanotechnology
02 engineering and technology
Charge-Transfer
010402 general chemistry
7. Clean energy
01 natural sciences
Photovoltaics
Electron injection
Photocurrent
QD
General Materials Science
[PHYS]Physics [physics]
Redox Couple
Tandem
Renewable Energy, Sustainability and the Environment
business.industry
Chemistry
Chalcogenide Nanocrystals
Non-blocking I/O
DAS
General Chemistry
QD Chemistry
NiO Photocathodes
021001 nanoscience & nanotechnology
0104 chemical sciences
Quantum dot
Electrode
Optoelectronics
Ligand-Exchange
0210 nano-technology
Mesoporous material
business
Subjects
Details
- ISSN :
- 20507496 and 20507488
- Volume :
- 4
- Database :
- OpenAIRE
- Journal :
- J. Mater. Chem. A
- Accession number :
- edsair.doi.dedup.....889803d312a6d253efb2d8aeb5097609