Band alignment and charge transfer in CsPbBr3-CdSe nanoplatelet hybrids coupled by molecular linkers

Swayandipta Dey, Hagai Cohen, Iddo Pinkas, Hong Lin, Miri Kazes, Dan Oron

Research output: Contribution to journalArticle

Abstract

Formation of a p-n junction-like with a large built-in field is demonstrated at the nanoscale, using two types of semiconducting nanoparticles, CsPbBr3 nanocrystals and CdSe nanoplatelets, capped with molecular linkers. By exploiting chemical recognition of the capping molecules, the two types of nanoparticles are brought into mutual contact, thus initiating spontaneous charge transfer and the formation of a strong junction field. Depending on the choice of capping molecules, the magnitude of the latter field is shown to vary in a broad range, corresponding to an interface potential step as large as ∼1 eV. The band diagram of the system as well as the emergence of photoinduced charge transfer processes across the interface is studied here by means of optical and photoelectron based spectroscopies. Our results propose an interesting template for generating and harnessing internal built-in fields in heterogeneous nanocrystal solids.

Original languageEnglish
Article number174704
JournalJournal of Chemical Physics
Volume151
Issue number17
DOIs
Publication statusPublished - Nov 7 2019

Fingerprint

Nanocrystals
Charge transfer
nanocrystals
alignment
charge transfer
Nanoparticles
nanoparticles
Molecules
Photoelectrons
p-n junctions
molecules
photoelectrons
templates
diagrams
Spectroscopy
spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Band alignment and charge transfer in CsPbBr3-CdSe nanoplatelet hybrids coupled by molecular linkers. / Dey, Swayandipta; Cohen, Hagai; Pinkas, Iddo; Lin, Hong; Kazes, Miri; Oron, Dan.

In: Journal of Chemical Physics, Vol. 151, No. 17, 174704, 07.11.2019.

Research output: Contribution to journalArticle

Dey, Swayandipta ; Cohen, Hagai ; Pinkas, Iddo ; Lin, Hong ; Kazes, Miri ; Oron, Dan. / Band alignment and charge transfer in CsPbBr3-CdSe nanoplatelet hybrids coupled by molecular linkers. In: Journal of Chemical Physics. 2019 ; Vol. 151, No. 17.
@article{c8a88cb7c424454e8067a1c9ff1e87e4,
title = "Band alignment and charge transfer in CsPbBr3-CdSe nanoplatelet hybrids coupled by molecular linkers",
abstract = "Formation of a p-n junction-like with a large built-in field is demonstrated at the nanoscale, using two types of semiconducting nanoparticles, CsPbBr3 nanocrystals and CdSe nanoplatelets, capped with molecular linkers. By exploiting chemical recognition of the capping molecules, the two types of nanoparticles are brought into mutual contact, thus initiating spontaneous charge transfer and the formation of a strong junction field. Depending on the choice of capping molecules, the magnitude of the latter field is shown to vary in a broad range, corresponding to an interface potential step as large as ∼1 eV. The band diagram of the system as well as the emergence of photoinduced charge transfer processes across the interface is studied here by means of optical and photoelectron based spectroscopies. Our results propose an interesting template for generating and harnessing internal built-in fields in heterogeneous nanocrystal solids.",
author = "Swayandipta Dey and Hagai Cohen and Iddo Pinkas and Hong Lin and Miri Kazes and Dan Oron",
year = "2019",
month = "11",
day = "7",
doi = "10.1063/1.5124552",
language = "English",
volume = "151",
journal = "Journal of Chemical Physics",
issn = "0021-9606",
publisher = "American Institute of Physics Publising LLC",
number = "17",

}

TY - JOUR

T1 - Band alignment and charge transfer in CsPbBr3-CdSe nanoplatelet hybrids coupled by molecular linkers

AU - Dey, Swayandipta

AU - Cohen, Hagai

AU - Pinkas, Iddo

AU - Lin, Hong

AU - Kazes, Miri

AU - Oron, Dan

PY - 2019/11/7

Y1 - 2019/11/7

N2 - Formation of a p-n junction-like with a large built-in field is demonstrated at the nanoscale, using two types of semiconducting nanoparticles, CsPbBr3 nanocrystals and CdSe nanoplatelets, capped with molecular linkers. By exploiting chemical recognition of the capping molecules, the two types of nanoparticles are brought into mutual contact, thus initiating spontaneous charge transfer and the formation of a strong junction field. Depending on the choice of capping molecules, the magnitude of the latter field is shown to vary in a broad range, corresponding to an interface potential step as large as ∼1 eV. The band diagram of the system as well as the emergence of photoinduced charge transfer processes across the interface is studied here by means of optical and photoelectron based spectroscopies. Our results propose an interesting template for generating and harnessing internal built-in fields in heterogeneous nanocrystal solids.

AB - Formation of a p-n junction-like with a large built-in field is demonstrated at the nanoscale, using two types of semiconducting nanoparticles, CsPbBr3 nanocrystals and CdSe nanoplatelets, capped with molecular linkers. By exploiting chemical recognition of the capping molecules, the two types of nanoparticles are brought into mutual contact, thus initiating spontaneous charge transfer and the formation of a strong junction field. Depending on the choice of capping molecules, the magnitude of the latter field is shown to vary in a broad range, corresponding to an interface potential step as large as ∼1 eV. The band diagram of the system as well as the emergence of photoinduced charge transfer processes across the interface is studied here by means of optical and photoelectron based spectroscopies. Our results propose an interesting template for generating and harnessing internal built-in fields in heterogeneous nanocrystal solids.

UR - http://www.scopus.com/inward/record.url?scp=85074657172&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85074657172&partnerID=8YFLogxK

U2 - 10.1063/1.5124552

DO - 10.1063/1.5124552

M3 - Article

C2 - 31703516

AN - SCOPUS:85074657172

VL - 151

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

SN - 0021-9606

IS - 17

M1 - 174704

ER -