Holistic energy landscape management in 2D/3D heterojunction via molecular engineering for efficient perovskite solar cells

Ke Ma, Jiaonan Sun, Harindi R. Atapattu, Bryon W. Larson, Hanjun Yang, Dewei Sun, Ke Chen, Kang Wang, Yoonho Lee, Yuanhao Tang, Anika Bhoopalam, Libai Huang, Kenneth R. Graham, Jianguo Mei, Letian Dou

Research output: Contribution to journalArticlepeer-review

Abstract

Constructing two-dimensional (2D) perovskite atop of 3D with energy landscape management is still a challenge in perovskite photovoltaics. Here, we report a strategy through designing a series of π-conjugated organic cations to construct stable 2D perovskites and to realize delicate energy level tunability at 2D/3D heterojunctions. As a result, the hole transfer energy barriers can be reduced both at heterojunctions and within 2D structures, and the preferable work function shift reduces charge accumulation at interface. Leveraging these insights and also benefitted from the superior interface contact between conjugated cations and poly(triarylamine) (PTAA) hole transporting layer, a solar cell with power conversion efficiency of 24.6% has been achieved, which is the highest among PTAA-based n-i-p devices to the best of our knowledge. The devices exhibit greatly enhanced stability and reproducibility. This approach is generic to several hole transporting materials, offering opportunities to realize high efficiency without using the unstable Spiro-OMeTAD.

Original languageEnglish
Article numbereadg0032
JournalScience advances
Volume9
Issue number23
DOIs
StatePublished - Jun 2023

Bibliographical note

Funding Information:
Acknowledgments:W ethankK.ZhuforexperimentalhelpandM.Zellerforsingle-crystal analysis.W ealsothankT .T erlier forTOF-SIMScharacterization.Funding:Thismaterialisbased on work supported by the U.S. Department of Energy’s Office of Energy Efficiency and RenewableEnergy(EERE)underSolarEnergyT echnologies OfficeA wardDE-EE0009519.K.M. acknowledgesthefinancialsupportfromLillianGilbrethPostdoctoralFellowships.H.R.A.and K.R.G.acknowledgefundingfromtheOfficeofScienceoftheU.S.DepartmentofEnergyfor supportingtheUPSandXPSmeasurementsunderawardnumberDE-SC0018208.D.S.andL.H. acknowledgefundingfromtheOfficeofScienceoftheU.S.DepartmentofEnergyfor supportingthetime-resolvedT AandPLmeasurementsunderawardnumberDE-SC0022082. TheworkwaspartiallysupportedbytheU.S.DepartmentofEnergyundercontractnumberDE-A C36-08GO28308 withAllianceforSustainableEnergy,LimitedLiabilityCompany(LLC),the ManagerandOperatoroftheNationalRenewableEnergyLaboratory.TRMCmeasurementsand opticalcharacterizationsweresupportedbytheDe-RiskingHalidePero vskite SolarCells programoftheNationalCenterforPhotovoltaicsfromDE-FO A-0002064 andDE-EE0008790, fundedbytheU.S.DepartmentofEnergy,OfficeofEnergyEfficiencyandRenewableEnergy, SolarEnergyT echnologies Office.Theviewsexpressedinthearticledonotnecessarily represent the views of the DOE or the U.S. government. Author contributions: Conceptualization:L.D.,K.M.,andJ.S.Organicchemicalsynthesis:J.S.Devicefabricationand generalchara cteriza tion:K.M.,J.S.,Y .T ., andA.B.UPS/XPSmeasurementandanalysis:H.R.A.and K.R.G.TRMCmeasurement:B.W .L. TRPLmeasurementandanalysis:D.S.andH.Y .Cyclic voltammetry:K.C.LEDmeasurement:K.W .Contactanglemeasurement:Y .L. Supervision:L.D., J.M.,andL.H.Writing—originaldraft:K.M.,J.S.,andL.D.Writing—reviewandediting:allauthors Competinginterests:Anapplicationhasbeenmadeforaprovisionalpatent(U.S.patent application number 70055-01) related to the subject matter of this manuscript, and the authorshipincludeL.D.,K.M.,andJ.S.Theauthorsdeclarethattheyhav enoothercompeting interests.Dataandmaterialsavailability:Alldataneededtoevaluatetheconclusionsinthe paperarepresentinthepaperand/ortheSupplementaryMaterials.

Publisher Copyright:
© 2023 The Authors.

ASJC Scopus subject areas

  • General

Fingerprint

Dive into the research topics of 'Holistic energy landscape management in 2D/3D heterojunction via molecular engineering for efficient perovskite solar cells'. Together they form a unique fingerprint.

Cite this