Trap-state suppression and improved charge transport in PbS quantum dot solar cells with synergistic mixed ligand treatments
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Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/116670
Tipus de documentArticle
Data publicació2017-04-12
EditorWiley
Condicions d'accésAccés obert
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continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
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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)
AGR-INSTITUTO DE CIENCIAS FOTONICAS (MINECO-SEV-2015-0522)
NANOPTO - Novel processing of colloidal nanocrystals for optoelectronic applications (EC-H2020-703018)
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)
AGR-INSTITUTO DE CIENCIAS FOTONICAS (MINECO-SEV-2015-0522)
NANOPTO - Novel processing of colloidal nanocrystals for optoelectronic applications (EC-H2020-703018)
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)
Abstract
The power conversion efficiency of colloidal PbS‐quantum‐dot (QD)‐based solar cells is significantly hampered by lower‐than‐expected open circuit voltage (VOC). The VOC deficit is considerably higher in QD‐based solar cells compared to other types of existing solar cells due to in‐gap trap‐induced bulk recombination of photogenerated carriers. Here, this study reports a ligand exchange procedure based on a mixture of zinc iodide and 3‐mercaptopropyonic acid to reduce the VOC deficit without compromising the high current density. This layer‐by‐layer solid state ligand exchange treatment enhances the photovoltaic performance from 6.62 to 9.92% with a significant improvement in VOC from 0.58 to 0.66 V. This study further employs optoelectronic characterization, X‐ray photoelectron spectroscopy, and photoluminescence spectroscopy to understand the origin of VOC improvement. The mixed‐ligand treatment reduces the sub‐bandgap traps and significantly reduces bulk recombination in the devices.
CitacióPradhan, S. [et al.]. Trap-state suppression and improved charge transport in PbS quantum dot solar cells with synergistic mixed ligand treatments. "Small", 12 Abril 2017, vol. 13, núm. 21.
ISSN1613-6810
Versió de l'editorhttps://onlinelibrary.wiley.com/doi/full/10.1002/smll.201700598
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Manuscript Small Accepted.pdf | 936,3Kb | Visualitza/Obre |