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Naslov:The effect of polymer molecular weight on the performance of PTB7-Th:O-IDTBR non-fullerene organic solar cells
Avtorji:ID Hoefler, Sebastian F., Graz University of Technology (Avtor)
ID Pavlica, Egon, UNG (Avtor)
ID Bratina, Gvido, UNG (Avtor), et al.
Datoteke: Gradivo nima datotek, ki so prostodostopne za javnost. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u. Povezava se odpre v novem oknu
Jezik:Angleški jezik
Vrsta gradiva:Delo ni kategorizirano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:Recent advances in the development of non-fullerene acceptors have increased the power conversion efficiency of organic solar cells to approximately 13%. Fullerene-derivatives and non-fullerene acceptors possess distinctively different structural, optical and electronic properties, which also change the requirements on the polymer donor in non-fullerene organic solar cells. Therefore, in this study, the effect of the molecular weight of the conjugated polymer on the photovoltaic performance, charge carrier mobility, crystallization properties, film morphology, and non-geminate recombination dynamics is systematically investigated in polymer:small molecule organic solar cells using the low bandgap polymer PTB7-Th as the donor and the non-fullerene indacenodithiophene-based small molecule O-IDTBR as the acceptor. Among the examined polymer samples (50–300 kDa), high molecular weights of PTB7-Th (with an optimum molecular weight of 200 kDa) are advantageous to achieve high efficiencies up to 10%, which can be correlated with an increased crystallinity, an improved field-effect hole mobility (1.05 × 10−2 cm2 V−1 s−1), lower charge carrier trapping and a reduced activation energy of charge transport (98 meV). Bias-assisted charge extraction and transient photovoltage measurements reveal higher carrier concentrations (1016 cm−3) and long lifetimes (4.5 μs) as well as lower non-geminate recombination rate constants in the corresponding devices, supporting the high photocurrents (ca. 15.2 mA cm−2) and fill factors (>60%).
Ključne besede:organski polprevodniki, gibljivost, organske sončne celice
Verzija publikacije:Objavljena publikacija
Leto izida:2018
Št. strani:9506-9516
Številčenje:6
PID:20.500.12556/RUNG-3946-612eb1f9-1a84-26e1-e6f0-ce88c965f4cc Novo okno
COBISS.SI-ID:5156347 Novo okno
DOI:10.1039/c8ta02467g Novo okno
NUK URN:URN:SI:UNG:REP:07SLQDVV
Datum objave v RUNG:28.05.2018
Število ogledov:5969
Število prenosov:0
Metapodatki:XML DC-XML DC-RDF
:
HOEFLER, Sebastian F., PAVLICA, Egon in BRATINA, Gvido, 2018, The effect of polymer molecular weight on the performance of PTB7-Th:O-IDTBR non-fullerene organic solar cells. Journal of Materials Chemistry A [na spletu]. 2018. Vol. 6, p. 9506–9516. [Dostopano 22 april 2025]. DOI 10.1039/c8ta02467g. Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=3946
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Gradivo je del revije

Naslov:Journal of Materials Chemistry A
Leto izida:2018

Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P1-0055

Licence

Licenca:CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
Opis:Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.
Začetek licenciranja:28.05.2018

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