A Doublet State Palladium(I) N-Heterocyclic Carbene Complex as a Dopant and Stabilizer for Improved Photostability in Organic Solar Cells
El Astal-Quirós, Aliah (Universidad de Alcalá)
Carrarini, Valentina (Università degli Studi di Roma Tor Vergata)
Zarotti, Francesca (Università degli Studi di Roma Tor Vergata)
Rahman, Atiq Ur (Università degli Studi di Roma Tor Vergata)
Lledós, Agustí (Universitat Autònoma de Barcelona. Departament de Química)
Yebra, Cristina G. (Universidad de Alcalá)
de Jesús, Ernesto (Universidad de Alcalá)
Reale, Andrea (Università degli Studi di Roma Tor Vergata)

Data:	2024
Resum:	The effect of doublet state metalloradical complex in a solar cell inside the common active layer poly(3-hexylthiophene)/[6,6]-phenyl-C61-butyric acid methyl ester (P3HT/PCBM) is explored. In this work, it is demonstrated that the role of the bis-[1,3-bis-(2,6-diisopropylphenyl)-4,5-dichloroimidazol-2-ylidene]palladium(I) hexafluoridophosphate dopant, [Pd(IPr)][PF], is crucial because the presence of a stable unpaired electron in the molecule significantly improves the optoelectronic performance of the device. We f the optimal concentration of this molecule in the active layer and demonstrate that the presence of this additive in the active layer helps to significantly improve the morphology of the device. The improvements in optoelectronic and morphological parameters are associated with a remarkable increase in photocurrent generation due to more favorable mechanisms of charge separation at the donor/acceptor (D/A) interfaces of the active layer and reduced recombinations. Moreover, the presence of this additive improves the stability of the unencapsulated solar cell against photochemical degradation produced by sunlight.
Ajuts:	Agencia Estatal de Investigación PID2020-114637GB-I00 Agencia Estatal de Investigación TED2021-129634B-I00
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Inverted organic solar cells ; Dopant ; Organometallic molecule ; Palladium ; Optoelectronic improvement ; Morphology ; Stability
Publicat a:	Energies, Vol. 17, Issue 15 (August 2024) , art. 3787, ISSN 1996-1073

DOI: 10.3390/en17153787

19 p, 31.3 MB

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