Interface Energy Alignment between Lead Halide Perovskite Single Crystals and TIPS-Pentacene

Garcia Fernandez, AlbertoKTH,Tillämpad fysikalisk kemi,KTH Royal Inst Technol, Dept Chem, Div Appl Phys Chem, S-10044 Stockholm, Sweden. (författare)

QC 20231024
At present, there is a huge development in optoelectronic applications using lead halide perovskites. Considering that device performance is largely governed by the transport of charges across interfaces and, therefore, the interfacial electronic structure, fundamental investigations of perovskite interfaces are highly necessary. In this study, we use high-resolution soft X-ray photoelectron spectroscopy based on synchrotron radiation to explore the interfacial energetics for the molecular layer of TIPS-pentacene and lead halide perovskite single crystals. We perform ultrahigh vacuum studies on multiple thicknesses of an in situ formed interface of TIPS-pentacene with four different in situ cleaved perovskite single crystals (MAPbI3, MAPbBr3, FAPbBr3, and CsxFA1-xPbBryI3-y). Our findings reveal a substantial shift of the TIPS-pentacene energy levels toward higher binding energies with increasing thickness, while the perovskite energy levels remain largely unaffected regardless of their composition. These shifts can be interpreted as band bending in the TIPS-pentacene, and such effects should be considered when assessing the energy alignment at perovskite/organic transport material interfaces. Furthermore, we were able to follow a reorganization on the MAPbI3 surface with the transformation of the surface C 1s into bulk C 1s.

Kammlander, BirgitKTH,Tillämpad fysikalisk kemi,KTH Royal Inst Technol, Dept Chem, Div Appl Phys Chem, S-10044 Stockholm, Sweden.(Swepub:kth)u1f3xfi2 (författare)
Riva, StefaniaUppsala universitet,Institutionen för fysik och astronomi(Swepub:uu)steri845 (författare)
Kühn, DaniloInstitute Methods and Instrumentation for Synchrotron Radiation Research PSISRR, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Straße 15, Berlin, 12489, Germany,Helmholtz Zentrum Berlin Mat & Energie, Inst Methods & Instrumentat Synchrotron Radiat Re, D-12489 Berlin, Germany. (författare)
Svanström, SebastianUppsala universitet,Institutionen för fysik och astronomi,Uppsala Univ, Dept Phys & Astron, Div Xray Photon Sci, S-75120 Uppsala, Sweden.(Swepub:uu)sebsv792 (författare)
Rensmo, HåkanUppsala universitet,Energimaterialens fysik(Swepub:uu)hakanrm (författare)
Cappel, Ute B.KTH,Tillämpad fysikalisk kemi(Swepub:kth)u15ztiw5 (författare)
KTHTillämpad fysikalisk kemi (creator_code:org_t)

Ingår i:Inorganic Chemistry: American Chemical Society (ACS)62:38, s. 15412-154200020-16691520-510X

Av författaren/redakt...: Garcia Fernandez ...; Kammlander, Birg ...; Riva, Stefania; Kühn, Danilo; Svanström, Sebas ...; Rensmo, Håkan; visa fler...; Cappel, Ute B.; visa färre...

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