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  4. Zinc Phthalocyanine Conjugated Dimers as Efficient Dopant-Free Hole Transporting Materials in Perovskite Solar Cells
 
research article

Zinc Phthalocyanine Conjugated Dimers as Efficient Dopant-Free Hole Transporting Materials in Perovskite Solar Cells

Molina, Desire
•
Ruiz-Preciado, Marco A.  
•
Carlsen, Brian  
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February 3, 2020
Chemphotochem

Four ZnPc-dimers with 2,5-thienyl (ZnPc-th-ZnPc 1), 2,7-fluorenyl (ZnPc-flu-ZnPc 2), 3,6-bisthienylldiketopyrrolopyrrole (ZnPc-DPP-ZnPc 3) and 1,4-phenyl (ZnPc-p-ZnPc 4) bridges have been studied as dopant-free hole transporting materials (HTMs) in perovskite solar cells (PSCs). The synthesis and characterization of ZnPc-th-ZnPc 1 and ZnPc-flu-ZnPc 2 dimers are reported for the first time. Steady state and time resolved photoluminescence demonstrate the good hole-extraction capability of these materials. The best efficiencies obtained for dimers 1, 2, 3 and 4 are 15.5 %, 15.6 %, 16.8 % and 15.7 %, respectively, without the addition of dopants. Besides, these derivatives demonstrated better stability both in dark storage conditions with a relative humidity 60 % for 160 h when compared to doped spiro-OMeTAD. The push-pull nature of dimer ZnPc-DPP-ZnPc 3 has led to the highest efficiency among the ZnPc derivatives under study demonstrating that donor-acceptor-donor systems can be good alternatives to commonly used materials due their energy levels, low cost and the final morphology of the hole transporting layer.

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Type
research article
DOI
10.1002/cptc.201900245
Web of Science ID

WOS:000510535400001

Author(s)
Molina, Desire
Ruiz-Preciado, Marco A.  
Carlsen, Brian  
Eickemeyer, Felix Thomas  
Yang, Bowen  
Flores-Diaz, Natalie  
Joao Alvaro-Martins, Maria
Nonomura, Kazuteru  
Hagfeldt, Anders  
Sastre-Santos, Angela
Date Issued

2020-02-03

Publisher

WILEY-V C H VERLAG GMBH

Published in
Chemphotochem
Volume

4

Issue

4

Start page

307

End page

314

Subjects

Chemistry, Physical

•

Chemistry

•

hole transporting materials

•

perovskites

•

photovoltaics

•

phthalocyanines

•

solar cells

•

copper phthalocyanine

•

low-cost

•

stability

•

layers

•

metal

•

performance

•

20-percent

•

porphyrin

•

carbon

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSPM  
Available on Infoscience
March 3, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/166665
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