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Versatile aza-BODIPY-based low-bandgap conjugated small molecule for light harvesting and near-infrared photodetection

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InfoMat 2022年第12期4卷 112-127页

作者： Gurudutt Bhat Marcin Kielar Haixia Rao Mahnaz D.Gholami Isabel Mathers Astrid C.R.Larin Thomas Flanagan Enkhtur Erdenebileg Annalisa Bruno Amandeep Singh Pannu Kathryn E.Fairfull-Smith Emad L.Izake Pankaj Sah yeng ming lam Ajay K.Pandey Prashant Sonar School of Chemistry Physicsand Centre for Materials ScienceQueensland University of TechnologyBrisbaneQueenslandAustralia School of Electrical Engineering and Robotics Queensland University of TechnologyBrisbaneQueenslandAustralia Queensland Brain Institute The University of QueenslandSt LuciaQueenslandAustralia School of Materials Science and Engineering Nanyang Technological UniversitySingaporeSingapore Energy Research Institute@NTU(ERI@N) Nanyang Technological UniversitySingaporeSingapore

The versatile nature of organic conjugated materials renders their flawless integration into a diverse family of optoelectronic devices with light-harvesting,photodetection,or light-emitting *** of materials that offer the possibilities of two or more distinct optoelectronic functions are particularly attractive as they enable smart applications while providing the benefits of the ease of fabrication using low-cost ***,we develop a novel,multi-purpose conjugated small molecule by combining boron-azadipyrromethene(aza-BODIPY)as electron acceptor with triphenylamine(TPA)as end-capping donor *** implemented donor–acceptor–donor(D–A–D)configuration,in the form of TPA-azaBODIPY-TPA,preserves ideal charge transfer characteristics with appropriate excitation energy levels,with the additional ability to be used as either a charge transporting interlayer or light-sensing semiconducting layer in optoelectronic *** demonstrate its versatility,we first show that TPA-azaBODIPY-TPA can act as an excellent hole transport layer in methylammonium lead triiodide(MAPbI3)-based perovskite solar cells with measured power conversion efficiencies exceeding 17%,outperforming control solar cells with PEDOT:PSS by nearly 60%.Furthermore,the optical bandgap of 1.49 eV is shown to provide significant photodetection in the wavelength range of up to 800 nm where TPA-azaBODIPY-TPA functions as donor in near-infrared organic photodetectors(OPDs)composed of fullerene ***,the established versatility of TPA-azaBODIPY-TPA,combined with its robust thermal stability as well as excellent solubility and processability,provides a new guide for developing highly efficient multi-purpose electronic materials for the next-generation of smart optoelectronic devices.

关键词： BODIPY multifunctionality organic photodetector perovskite solar cell TPA TPA-azaBODIPY-TPA

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