Roadmap and roadblocks for the band gap tunability of metal halide perovskites
(2017) In Journal of Materials Chemistry A 5(23). p.11401-11409- Abstract
Solar cells based on metal-halide perovskite semiconductors inspire high hopes for efficient low cost solar cell technology. This material class exhibits a facile tunability of the band gap making them interesting for multi-junction device technology. We here compare and highlight trends in the band gap tunability and device performance metrics in reported metal halide perovskite alloys of a wide compositional range from low band gap compounds, such as FA0.75Cs0.25Sn0.5Pb0.5I3 with an absorption onset of 1.2 eV, to high bandgap compounds, such as CsPbBr3 with an absorption onset close to 2.4 eV. In between, metal halide perovskites can seemingly be seamlessly tuned by... (More)
Solar cells based on metal-halide perovskite semiconductors inspire high hopes for efficient low cost solar cell technology. This material class exhibits a facile tunability of the band gap making them interesting for multi-junction device technology. We here compare and highlight trends in the band gap tunability and device performance metrics in reported metal halide perovskite alloys of a wide compositional range from low band gap compounds, such as FA0.75Cs0.25Sn0.5Pb0.5I3 with an absorption onset of 1.2 eV, to high bandgap compounds, such as CsPbBr3 with an absorption onset close to 2.4 eV. In between, metal halide perovskites can seemingly be seamlessly tuned by compositional engineering. However, mixed bromide-iodide compounds with band gaps above 1.7 eV often exhibit photo-induced phase segregation inducing domains with lower band gaps that emit photons of low energy. This effect also reduces the photoluminescence quantum yield and hence the maximum open circuit voltage achievable in devices. This highlight summarizes general trends for metal halide perovskites with respect to their absorption onset. Furthermore recent progress as well as possible roadblocks for the band gap tunability of metal halide perovskites are highlighted as this is of particular importance for the development of multifunction solar cell technology.
(Less)
- author
- Unger, E. L. LU ; Kegelmann, Lukas ; Suchan, K. LU ; Sörell, D. ; Korte, Lars and Albrecht, Susanne
- organization
- publishing date
- 2017
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Materials Chemistry A
- volume
- 5
- issue
- 23
- pages
- 9 pages
- publisher
- Royal Society of Chemistry
- external identifiers
-
- wos:000403228200002
- scopus:85021706092
- ISSN
- 2050-7488
- DOI
- 10.1039/c7ta00404d
- language
- English
- LU publication?
- yes
- id
- f57dd666-ea70-444e-9e91-9d45e4f626e6
- date added to LUP
- 2017-07-20 08:46:27
- date last changed
- 2024-09-17 04:43:02
@article{f57dd666-ea70-444e-9e91-9d45e4f626e6,
abstract = {{<p>Solar cells based on metal-halide perovskite semiconductors inspire high hopes for efficient low cost solar cell technology. This material class exhibits a facile tunability of the band gap making them interesting for multi-junction device technology. We here compare and highlight trends in the band gap tunability and device performance metrics in reported metal halide perovskite alloys of a wide compositional range from low band gap compounds, such as FA<sub>0.75</sub>Cs<sub>0.25</sub>Sn<sub>0.5</sub>Pb<sub>0.5</sub>I<sub>3</sub> with an absorption onset of 1.2 eV, to high bandgap compounds, such as CsPbBr<sub>3</sub> with an absorption onset close to 2.4 eV. In between, metal halide perovskites can seemingly be seamlessly tuned by compositional engineering. However, mixed bromide-iodide compounds with band gaps above 1.7 eV often exhibit photo-induced phase segregation inducing domains with lower band gaps that emit photons of low energy. This effect also reduces the photoluminescence quantum yield and hence the maximum open circuit voltage achievable in devices. This highlight summarizes general trends for metal halide perovskites with respect to their absorption onset. Furthermore recent progress as well as possible roadblocks for the band gap tunability of metal halide perovskites are highlighted as this is of particular importance for the development of multifunction solar cell technology.</p>}},
author = {{Unger, E. L. and Kegelmann, Lukas and Suchan, K. and Sörell, D. and Korte, Lars and Albrecht, Susanne}},
issn = {{2050-7488}},
language = {{eng}},
number = {{23}},
pages = {{11401--11409}},
publisher = {{Royal Society of Chemistry}},
series = {{Journal of Materials Chemistry A}},
title = {{Roadmap and roadblocks for the band gap tunability of metal halide perovskites}},
url = {{http://dx.doi.org/10.1039/c7ta00404d}},
doi = {{10.1039/c7ta00404d}},
volume = {{5}},
year = {{2017}},
}