Detail publikace

Diketopyrrolopyrrole-Based Organic Solar Cells Functionality: The Role of Orbital Energy and Crystallinity

HEINRICHOVÁ, P. POSPÍŠIL, J. STŘÍTESKÝ, S. VALA, M. WEITER, M. TOMAN, P. RAIS, D. PFLEGER, J. VONDRÁČEK, M. ŠIMEK, D. FEKETE, L. HORÁKOVÁ, P. DOKLÁDALOVÁ, L. KUBÁČ, L. KRATOCHVÍLOVÁ, I.

Originální název

Diketopyrrolopyrrole-Based Organic Solar Cells Functionality: The Role of Orbital Energy and Crystallinity

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

In this work, we investigated diketopyrrolopyrrole (DPP) derivatives as potential donor materials for fullerene:DPP solar cells. The derivatives 3,6-bis(5-(benzofuran-2-yl)thiophene-2-yl)-2,5-bis(2-ethylhexyl)pyrrolo[3,4-c]pyrrole-1,4-dione (DPP(TBFu)2) and 3,6-bis(5-(benzothiophene-2-yl)thiophene-2-yl)-2,5-bis(2-ethylhexyl)pyrrolo[3,4-c]pyrrole-1,4-dione (DPP(TBTh)2) were modified by introducing a nitrogen atom into the terminal moiety of the molecule. Our quantum-chemical calculations predicted that this modification would increase the rigidity of the molecular structure and increase the ionization potential relative to the original DPP derivatives. The higher ionization potential primarily supports an enhancement in the open circuit voltage, and a more rigid molecular structure will contribute to reduced nonradiative losses. We experimentally verified the fullerene:DPP solar cell concept based on the coincidence of a smaller driving force for charge separation at the donor/acceptor interface and the crystallinity of the studied DPP derivatives for preparing effective photovoltaic devices. The reduction of the driving force for charge separation could be overcome by more structured/packed donor DPP materials; the delocalization of electrons and holes in such structured materials improves charge separation in OPV devices. Using wide range of experimental methods, we determined the parameters of the studied DPP materials with PC70BM in thin films. This work contributes to practical applications by verifying the concept of this organic solar cell design.

Klíčová slova

Organic solar cells, energy transfer, charge transfer, DPP, fullerene, heterojunction

Autoři

HEINRICHOVÁ, P.; POSPÍŠIL, J.; STŘÍTESKÝ, S.; VALA, M.; WEITER, M.; TOMAN, P.; RAIS, D.; PFLEGER, J.; VONDRÁČEK, M.; ŠIMEK, D.; FEKETE, L.; HORÁKOVÁ, P.; DOKLÁDALOVÁ, L.; KUBÁČ, L.; KRATOCHVÍLOVÁ, I.

Vydáno

16. 4. 2019

Nakladatel

American Chemical Society

Místo

USA

ISSN

1932-7447

Periodikum

Journal of Physical Chemistry C (print)

Ročník

123

Číslo

18

Stát

Spojené státy americké

Strany od

11447

Strany do

11463

Strany počet

16

URL

https://pubs.acs.org/doi/full/10.1021/acs.jpcc.9b01328

BibTex

@article{BUT157617,
  author="Patricie {Heinrichová} and Jan {Pospíšil} and Stanislav {Stříteský} and Martin {Vala} and Martin {Weiter} and Petr {Toman} and David {Rais} and Jiří {Pfleger} and Martin {Vondráček} and Daniel {Šimek} and Ladislav {Fekete} and Petra {Horáková} and Lenka {Dokládalová} and Lubomír {Kubáč} and Irena {Kratochvílová}",
  title="Diketopyrrolopyrrole-Based Organic Solar Cells Functionality: The Role of Orbital Energy and Crystallinity",
  journal="Journal of Physical Chemistry C (print)",
  year="2019",
  volume="123",
  number="18",
  pages="11447--11463",
  doi="10.1021/acs.jpcc.9b01328",
  issn="1932-7447",
  url="https://pubs.acs.org/doi/full/10.1021/acs.jpcc.9b01328"
}