Isothermal crystallization of P3HT:PCBM blends studied by RHC

Fatma Demir, Niko Van den Brande, Bruno Van Mele, Sabine Bertho, Dirk Vanderzande, Jean Manca, Guy Van Assche

Onderzoeksoutput: Articlepeer review

20 Citaten (Scopus)

Samenvatting

Defining appropriate annealing temperatures and times is vitally important for increasing the efficiency of bulk heterojunction solar cells by favoring the crystallinity of the polymer-fullerene blend components. In order to better understand the annealing process, the isothermal crystallization of poly(3-hexyl thiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM) blend investigated by means of rapid heating cooling calorimetry (RHC). Isothermal crystallization experiments at temperatures in between the glass transition and melting, within the temperature range of 70-150 °C, can successfully be performed since RHC permits cooling at a sufficiently high rate in order to prevent crystallization during cooling. Crystallization isotherms were determined from the subsequent melting behavior of the blend. They were measured for a wide set of annealing temperatures and times, and the evolution of the crystallization rate with temperature is compared for annealing from the glassy state and from the melt state.
Originele taal-2English
Pagina's (van-tot)845-849
Aantal pagina's5
TijdschriftJournal of Thermal Analysis and Calorimetry
Volume105
Nummer van het tijdschrift3
StatusPublished - 11 jun 2011

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