Astrid-Caroline Knall (Avtor), Samuel Rabensteiner (Avtor), Sebastian F. Hoefler (Avtor), Matiss Reinfelds (Avtor), Mathias A. Hobisch (Avtor), Heike M. A. Ehmann (Avtor), N. Pastukhova (Avtor), Egon Pavlica (Avtor), Gvido Bratina (Avtor), Ilie Hanzu (Avtor)

Povzetek

The recent success of non-fullerene acceptors in organic photovoltaics also entails a change in the requirements to the polymer donor in terms of optical and morphological properties leading to a demand for novel conjugated polymers. Herein, we report on the synthesis of a 1,4-bis-(thiophene-2-yl)-pyrrolopyridazinedione based copolymer with 2-ethylhexyl substituents on the pyrrolopyridazinedione moiety. A 2D conjugated benzodithiophene (BDT) was chosen as comonomer. The resulting copolymer T-EHPPD-T-EHBDT showed a molecular weight of 10.2 kDa, an optical band gap of 1.79 eV, a hole mobility of 1.8 × 10−4 cm2 V−1 s−1 and a preferred face-on orientation with regard to the substrate. The comparably wide band gap as well as the determined energy levels (HOMO: −5.47 eV, LUMO: −3.68 eV) match well with the narrow band gap non-fullerene acceptor ITIC-F, which was used as the acceptor phase in the bulk heterojunction absorber layers in the investigated solar cells. The solar cells, prepared in inverted architecture, revealed power conversion efficiencies up to 7.4% using a donor:acceptor ratio of 1 : 1 in the absorber layer.

Ključne besede

non-fullerene solar cells;charge transport;charge mobility;power conversion efficiency;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UNG - Univerza v Novi Gorici
UDK: 53
COBISS: 48862979 Povezava se bo odprla v novem oknu
ISSN: 1369-9261
Št. ogledov: 1803
Št. prenosov: 0
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

URN: URN:SI:UNG
Vrsta dela (COBISS): Delo ni kategorizirano
Strani: str. 1001-1009
Letnik: ǂVol. ǂ45
Zvezek: ǂiss. ǂ2
Čas izdaje: 2021
DOI: 10.1039/D0NJ04573J
ID: 12504011