Journal of the American Chemical Society · 2014 · 776 citations · 23 references
EngineeringMaterials EngineeringMaterials ScienceNanomaterialsOptoelectronicsSemiconductor MaterialsOptoelectronic DevicesOptoelectronic MaterialsPhotovoltaic DevicesQuantum DotsSolar Cell MaterialsSolar CellsGraphene Quantum DotsOptoelectronic PropertiesPerovskite Solar CellsPhotoluminescencePower ConversionPower Conversion EfficiencyQuenching ProcessesTransient Absorption Spectroscopy
We report on a significant power conversion efficiency improvement of perovskite solar cells from 8.81% to 10.15% due to insertion of an ultrathin graphene quantum dots (GQDs) layer between perovskite and TiO2. A strong quenching of perovskite photoluminescence was observed at ∼760 nm upon the addition of the GQDs, which is pronouncedly correlated with the increase of the IPCE and the APCE of the respective cells. From the transient absorption measurements, the improved cell efficiency can be attributed to the much faster electron extraction with the presence of GQDs (90-106 ps) than without their presence (260-307 ps). This work highlights that GQDs can act as a superfast electron tunnel for optoelectronic devices.
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Opportunities and challenges for a sustainable energy future
Steven Chu, Arun Majumdar · Nature · 2012 · 12.2K citations
Engineering, Environmental Engineering, Renewable Energy Systems +11
Sequential deposition as a route to high-performance perovskite-sensitized solar cells
Julian Burschka, Norman Pellet, Soo‐Jin Moon et al. · Nature · 2013 · 9.4K citations · Full text
Natural Sciences, Materials Engineering, Materials Science +12