Diketopyrrolopyrrole derivatives: influence of peripheral groups in the excited states absorption process

Leandro Henrique Zucolotto Cocca; João Victor Pereira Valverde; Rafael Queiros Marcia; Alfredo Leithold Neto; Andreia Gerniski Macedo; Paula Cristina Rodrigues; Cleber Renato Mendonça; Leonardo De Boni

doi:10.1117/12.3002662

12 March 2024 Diketopyrrolopyrrole derivatives: influence of peripheral groups in the excited states absorption process

Leandro Henrique Zucolotto Cocca, João Victor Pereira Valverde, Rafael Queiros Marcia, Alfredo Leithold Neto, Andreia Gerniski Macedo, Paula Cristina Rodrigues, Cleber Renato Mendonça, Leonardo De Boni

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Proceedings Volume PC12883, Organic Photonic Materials and Devices XXVI; PC128830I (2024) https://doi.org/10.1117/12.3002662
Event: SPIE OPTO, 2024, San Francisco, California, United States

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Abstract

Organic π-conjugated molecules offer great potential for nonlinear optics applications due to their structural flexibility and favorable emissive properties. Diketopyrrolopyrrole (DPP) derivatives, known for their high planarity and excellent emissive properties, are particularly attractive for such research. In this study, we investigated excited state absorption (ESA) in two DPP derivatives with thienyl groups and different peripheral substituents (hydrogen and bromine) using Z-scan and pump-and-probe techniques. The presence of the bromine atom resulted in a significantly higher nonlinear response, as evidenced by an ESA band at 415 nm with a cross-section 15 times larger than the ground state. Additionally, the sample with bromine exhibited a twofold increase in the cross-section. These findings establish DPP derivatives as promising materials for photonic device applications.

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Leandro Henrique Zucolotto Cocca, João Victor Pereira Valverde, Rafael Queiros Marcia, Alfredo Leithold Neto, Andreia Gerniski Macedo, Paula Cristina Rodrigues, Cleber Renato Mendonça, and Leonardo De Boni "Diketopyrrolopyrrole derivatives: influence of peripheral groups in the excited states absorption process", Proc. SPIE PC12883, Organic Photonic Materials and Devices XXVI, PC128830I (12 March 2024); https://doi.org/10.1117/12.3002662

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