Suppressing Deep Traps in PbS Colloidal Quantum Dots via Facile Iodide Substitutional Doping for Solar Cells with Efficiency >10%
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Cita com:
hdl:2117/101781
Tipus de documentArticle
Data publicació2017-02-28
EditorACS
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
ProjecteMATERIALES NANOCOMPUESTOS INORGANICOS CON PROPIEDADES CONTROLADAS JERARQUICAMENTE COMO UNA NUEVA PLATAFORMA PARA APLICACIONES FOTOVOLTAICAS (MINECO-MAT2014-56210-R)
GRAPHENE - Graphene-Based Revolutions in ICT And Beyond (EC-FP7-604391)
HEINSOL - Hierarchically Engineered Inorganic Nanomaterials from the atomic to supra-nanocrystalline level as a novel platform for SOLution Processed SOLar cells (EC-H2020-725165)
GRAPHENE - Graphene-Based Revolutions in ICT And Beyond (EC-FP7-604391)
HEINSOL - Hierarchically Engineered Inorganic Nanomaterials from the atomic to supra-nanocrystalline level as a novel platform for SOLution Processed SOLar cells (EC-H2020-725165)
Abstract
Surface passivation of PbS colloidal quantum dots (QDs) with iodide has been used in highly efficient solar cells. Iodide passivation is typically achieved by ligand exchange processes on QD films. Complementary to this approach, herein we present a non-intrusive solution-based strategy for doping QDs with iodide to further optimize solar cell performance. The doping step is applied in-situ at the end of the synthesis of the QDs. The optimum precursor I/Pb ratio is found to be in the 1.5-3% range at which iodide substitutes S without excessively altering the dots´ surface chemistry. This allows for band engineering and decreasing the density of deep trap states of the QDs which taken together lead to PbS QD solar cells with efficiency in excess of 10%.
CitacióStavrinadis, A. [et al.]. Suppressing Deep Traps in PbS Colloidal Quantum Dots via Facile Iodide Substitutional Doping for Solar Cells with Efficiency >10%. "ACS Energy Letters", 28 Febrer 2017.
ISSN2380-8195
Versió de l'editorhttp://pubs.acs.org/doi/abs/10.1021/acsenergylett.7b00091
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