Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Suppressing the photocatalytic activity of zinc oxide electron-transport layer in nonfullerene organic solar cells with a pyrene-bodipy interlayer
Δημιουργός/Συγγραφέας:	Soultati, Anastasia Verykios, Apostolis Panagiotakis, Stylianos Armadorou, Konstantina-Kalliopi Haider, Muhammad Irfan Kaltzoglou, Andreas Drivas, Charalampos Fakharuddin, Azhar Bao, Xichang Yang, Chunming Yusoff, Abd Rashid Bin Mohd Evangelou, Evangelos K [EL] Πετσαλάκης, Ιωάννης Δ.[EN] Petsalakis, Ioannis D. Kennou, Stella Falaras, Polycarpos Yannakopoulou, Konstantina Pistolis, George Argitis, Panagiotis Vasilopoulou, Maria
Ημερομηνία:	2020-05-13
Γλώσσα:	Αγγλικά
ISSN:	1944-8244 1944-8252
DOI:	10.1021/acsami.0c03147
Άλλο:	32364365
Περίληψη:	Organic solar cells based on nonfullerene acceptors have recently witnessed a significant rise in their power conversion efficiency values. However, they still suffer from severe instability issues, especially in an inverted device architecture based on the zinc oxide bottom electron transport layers. In this work, we insert a pyrene-bodipy donor-acceptor dye as a thin interlayer at the photoactive layer/zinc oxide interface to suppress the degradation reaction of the nonfullerene acceptor caused by the photocatalytic activity of zinc oxide. In particular, the pyrene-bodipy-based interlayer inhibits the direct contact between the nonfullerene acceptor and zinc oxide hence preventing the decomposition of the former by zinc oxide under illumination with UV light. As a result, the device photostability was significantly improved. The π-π interaction between the nonfullerene acceptor and the bodipy part of the interlayer facilitates charge transfer from the nonfullerene acceptor toward pyrene, which is followed by intramolecular charge transfer to bodipy part and then to zinc oxide. The bodipy-pyrene modified zinc oxide also increased the degree of crystallization of the photoactive blend and the face-on stacking of the polymer donor molecules within the blend hence contributing to both enhanced charge transport and increased absorption of the incident light. Furthermore, it decreased the surface work function as well as surface energy of the zinc oxide film all impacting in improved power conversion efficiency values of the fabricated cells with champion devices reaching values up to 9.86 and 11.80% for the fullerene and nonfullerene-based devices, respectively.
Τίτλος πηγής δημοσίευσης:	ACS applied materials & interfaces
Τόμος/Κεφάλαιο:	12
Τεύχος:	19
Σελίδες:	21961–21973
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Οργανική χημεία[EN] Organic chemistry
Λέξεις-Κλειδιά:	Bodipy Nonfullerene acceptors Organic solar cells Photocatalytic activiry Photostability Pyrene Zinc oxide
Κάτοχος πνευματικών δικαιωμάτων:	Copyright © 2020 American Chemical Society
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://pubs.acs.org/doi/10.1021/acsami.0c03147
Ηλεκτρονική διεύθυνση περιοδικού (link) :	https://pubs.acs.org/journal/aamick
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο