Impact of polymorphism on the optoelectronic properties of a low-bandgap semiconducting polymer

Mengmeng Li, Ahmed Hesham Balawi, Pieter J. Leenaers, Lu Ning, Gaël H.L. Heintges, Tomasz Marszalek, Wojciech Pisula, Martijn M. Wienk, Stefan C.J. Meskers, Yuanping Yi, Frédéric Laquai, René A.J. Janssen (Corresponding author)

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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Polymorphism of organic semiconducting materials exerts critical effects on their physical properties such as optical absorption, emission and electrical conductivity, and provides an excellent platform for investigating structure–property relations. It is, however, challenging to efficiently tune the polymorphism of conjugated polymers in aggregated, semi-crystalline phases due to their conformational freedom and anisotropic nature. Here, two distinctly different semi-crystalline polymorphs (β1 and β2) of a low-bandgap diketopyrrolopyrrole polymer are formed through controlling the solvent quality, as evidenced by spectroscopic, structural, thermal and charge transport studies. Compared to β1, the β2 polymorph exhibits a lower optical band gap, an enhanced photoluminescence, a reduced π-stacking distance, a higher hole mobility in field-effect transistors and improved photocurrent generation in polymer solar cells. The β1 and β2 polymorphs provide insights into the control of polymer self-organization for plastic electronics and hold potential for developing programmable ink formulations for next-generation electronic devices.

Originele taal-2Engels
Aantal pagina's11
TijdschriftNature Communications
Nummer van het tijdschrift1
StatusGepubliceerd - 28 jun 2019

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    Study results pave the way to programmable electronic inks

    René A.J. Janssen


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