Journal article
Azatruxene-Based, Dumbbell-Shaped, Donor-π-Bridge-Donor Hole-Transporting Materials for Perovskite Solar Cells.
- Illicachi LA Center for Research and Innovation in Bioinformatics and Photonics-CIBioFi, Grupo de Investigación de Compuestos Heterocíclicos, Universidad del Valle, Calle 13 No. 100-00, Edificio E20, Cali, Colombia.
- Urieta-Mora J Departamento Química Orgánica, Facultad C. C. Químicas, Universidad Complutense de Madrid, Av. Complutense s/n, 28040, Madrid, Spain.
- Calbo J Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, 46980, Paterna, Spain.
- Aragó J Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, 46980, Paterna, Spain.
- Igci C Group for Molecular Engineering of Functional Materials, EPFL VALAIS, 1951, Sion, Switzerland.
- García-Benito I Group for Molecular Engineering of Functional Materials, EPFL VALAIS, 1951, Sion, Switzerland.
- Momblona C Group for Molecular Engineering of Functional Materials, EPFL VALAIS, 1951, Sion, Switzerland.
- Insuasty B Center for Research and Innovation in Bioinformatics and Photonics-CIBioFi, Grupo de Investigación de Compuestos Heterocíclicos, Universidad del Valle, Calle 13 No. 100-00, Edificio E20, Cali, Colombia.
- Ortiz A Center for Research and Innovation in Bioinformatics and Photonics-CIBioFi, Grupo de Investigación de Compuestos Heterocíclicos, Universidad del Valle, Calle 13 No. 100-00, Edificio E20, Cali, Colombia.
- Roldán-Carmona C Group for Molecular Engineering of Functional Materials, EPFL VALAIS, 1951, Sion, Switzerland.
- Molina-Ontoria A IMDEA-Nanociencia, Universitaria de Cantoblanco, C/ Faraday 9, Ciudad, 28049, Madrid, Spain.
- Ortí E Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, 46980, Paterna, Spain.
- Martín N Departamento Química Orgánica, Facultad C. C. Químicas, Universidad Complutense de Madrid, Av. Complutense s/n, 28040, Madrid, Spain.
- Nazeeruddin MK Group for Molecular Engineering of Functional Materials, EPFL VALAIS, 1951, Sion, Switzerland.
- 2020-07-02
Published in:
- Chemistry (Weinheim an der Bergstrasse, Germany). - 2020
English
Three novel donor-π-bridge-donor (D-π-D) hole-transporting materials (HTMs) featuring triazatruxene electron-donating units bridged by different 3,4-ethylenedioxythiophene (EDOT) π-conjugated linkers have been synthesized, characterized, and implemented in mesoporous perovskite solar cells (PSCs). The optoelectronic properties of the new dumbbell-shaped derivatives (DTTXs) are highly influenced by the chemical structure of the EDOT-based linker. Red-shifted absorption and emission and a stronger donor ability were observed in passing from DTTX-1 to DTTX-2 due to the extended π-conjugation. DTTX-3 featured an intramolecular charge transfer between the external triazatruxene units and the azomethine-EDOT central scaffold, resulting in a more pronounced redshift. The three new derivatives have been tested in combination with the state-of-the-art triple-cation perovskite [(FAPbI3 )0.87 (MAPbBr3 )0.13 ]0.92 [CsPbI3 ]0.08 in standard mesoporous PSCs. Remarkable power conversion efficiencies of 17.48 % and 18.30 % were measured for DTTX-1 and DTTX-2, respectively, close to that measured for the benchmarking HTM spiro-OMeTAD (18.92 %), under 100 mA cm-2 AM 1.5G solar illumination. PSCs with DTTX-3 reached a PCE value of 12.68 %, which is attributed to the poorer film formation in comparison to DTTX-1 and DTTX-2. These PCE values are in perfect agreement with the conductivity and hole mobility values determined for the new compounds and spiro-OMeTAD. Steady-state photoluminescence further confirmed the potential of DTTX-1 and DTTX-2 for hole-transport applications as an alternative to spiro-OMeTAD.
- Language
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- English
- Open access status
- bronze
- Identifiers
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- DOI 10.1002/chem.202002115
- PMID 32608525
- Persistent URL
- https://sonar.ch/global/documents/281836
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