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Tuning halide perovskite energy levels

Canil, Laura ; Cramer, Tobias ; Fraboni, Beatrice ; Ricciarelli, Damiano ; Meggiolaro, Daniele ; Singh, Ajay ; Liu, Maning LU orcid ; Rusu, Marin ; Wolff, Christian M. and Phung, Nga , et al. (2021) In Energy and Environmental Science 14(3). p.1429-1438
Abstract

The ability to control the energy levels in semiconductors is compelling for optoelectronic applications. In this study, we managed to tune the work function (WF) of halide perovskite semiconductors using self-assembled monolayers of small molecules to induce stable dipoles at the surface. The direction and intensity of the surface dipoles rely on specific molecule-to-surface interactions. Electron acceptor or donor molecules result in the positive or negative WF shifts up to several hundreds of meV. Our approach provides a versatile tool to control the WF of halide perovskite and adjust the energy level alignment at the interface with charge transport materials in perovskite-based optoelectronics. The impact on perovskite solar cells... (More)

The ability to control the energy levels in semiconductors is compelling for optoelectronic applications. In this study, we managed to tune the work function (WF) of halide perovskite semiconductors using self-assembled monolayers of small molecules to induce stable dipoles at the surface. The direction and intensity of the surface dipoles rely on specific molecule-to-surface interactions. Electron acceptor or donor molecules result in the positive or negative WF shifts up to several hundreds of meV. Our approach provides a versatile tool to control the WF of halide perovskite and adjust the energy level alignment at the interface with charge transport materials in perovskite-based optoelectronics. The impact on perovskite solar cells is reported and discussed in detail with the support of modelling.

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publishing date
type
Contribution to journal
publication status
published
subject
in
Energy and Environmental Science
volume
14
issue
3
pages
10 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85103475227
ISSN
1754-5692
DOI
10.1039/d0ee02216k
language
English
LU publication?
no
id
eaada3c2-9816-412c-9e2b-14dca3cbf342
date added to LUP
2023-08-24 12:28:45
date last changed
2023-08-25 15:26:35
@article{eaada3c2-9816-412c-9e2b-14dca3cbf342,
  abstract     = {{<p>The ability to control the energy levels in semiconductors is compelling for optoelectronic applications. In this study, we managed to tune the work function (WF) of halide perovskite semiconductors using self-assembled monolayers of small molecules to induce stable dipoles at the surface. The direction and intensity of the surface dipoles rely on specific molecule-to-surface interactions. Electron acceptor or donor molecules result in the positive or negative WF shifts up to several hundreds of meV. Our approach provides a versatile tool to control the WF of halide perovskite and adjust the energy level alignment at the interface with charge transport materials in perovskite-based optoelectronics. The impact on perovskite solar cells is reported and discussed in detail with the support of modelling.</p>}},
  author       = {{Canil, Laura and Cramer, Tobias and Fraboni, Beatrice and Ricciarelli, Damiano and Meggiolaro, Daniele and Singh, Ajay and Liu, Maning and Rusu, Marin and Wolff, Christian M. and Phung, Nga and Wang, Qiong and Neher, Dieter and Unold, Thomas and Vivo, Paola and Gagliardi, Alessio and De Angelis, Filippo and Abate, Antonio}},
  issn         = {{1754-5692}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{1429--1438}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Energy and Environmental Science}},
  title        = {{Tuning halide perovskite energy levels}},
  url          = {{http://dx.doi.org/10.1039/d0ee02216k}},
  doi          = {{10.1039/d0ee02216k}},
  volume       = {{14}},
  year         = {{2021}},
}