Interfacial versus Bulk Properties of Hole-Transporting Materials for Perovskite Solar Cells: Isomeric Triphenylamine-Based Enamines versus Spiro-OMeTAD
Here,wereportonthreenewtriphenylamine-based enamines synthesizedbycondensationof anappropriateprimary amine with 2,2-diphenylacetaldehyde and characterized by experimental techniques and density functional theory (DFT) computations. Experimental results allowhighlighting attractive propertiesincludi...
| Autores: | , , , , , , , , , , , , |
|---|---|
| Formato: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Recursos: | Universidad Miguel Hernández de Elche |
| Repositorio: | REDIUMH. Depósito Digital de la UMH |
| OAI Identifier: | oai:dspace.umh.es:11000/38204 |
| Acesso em linha: | https://hdl.handle.net/11000/38204 |
| Access Level: | acceso abierto |
| Palavra-chave: | triphenylamine enamine spiro-OMeTAD hole mobility time of flight perovskite solar cell |
| Resumo: | Here,wereportonthreenewtriphenylamine-based enamines synthesizedbycondensationof anappropriateprimary amine with 2,2-diphenylacetaldehyde and characterized by experimental techniques and density functional theory (DFT) computations. Experimental results allowhighlighting attractive propertiesincludingsolid-stateionizationpotential intherangeof 5.33−5.69 eV in solid-state andholemobilities exceeding 10−3 cm2/V·s,whicharehigher than those inspiro-OMeTADat the sameelectricfields.DFT-basedanalysispoints tothepresenceof several conformers close in energy at room temperature. The newlysynthesizedhole-transportingmaterials(HTMs)wereused inperovskitesolarcellsandexhibitedperformancescomparableto that of spiro-OMeTAD.Thedevicecontainingonenewly synthesizedhole-transportingenaminewas characterizedbyapower conversionefficiencyof18.4%.Ouranalysis indicates that theperovskite−HTMinterfacedominates thepropertiesofperovskite solarcells.PLmeasurements indicatesmallerefficiencyforperovskite-to-newHTMholetransferascomparedtospiro-OMeTAD. Nevertheless, the comparablepower conversionefficiencies and simple synthesis of thenewcompoundsmake themattractive candidates forutilizationinperovskitesolarcells. |
|---|