Boron(iii) β-diketonate-based small molecules for functional non-fullerene polymer solar cells and organic resistive memory devices

Abstract

Boron(iii) β-diketonates have been demonstrated to serve as multi-functional materials in NFA-based OPVs and organic resistive memories.

Synthesis, Characterization, Supramolecular Self-Assembly, and Organic Resistive Memory Applications of BODIPY Derivatives

“…The lower threshold voltages of the device of compound 3 than that of compound 6 could be taken into account by the differences of the film morphology as revealed by the AFM and GIXRD studies. The smoother film of 3 and more crystalline region of 3 were believed to reduce the charge injection barrier and improved charge conduction of the compounds, hence allowing a more efficient charge trap filling and, thus, the lower turn-on voltages. ,, …”

Recent Progress in the Design of Fused-Ring Non-Fullerene Acceptors─Relations between Molecular Structure and Optical, Electronic, and Photovoltaic Properties

“…Solar cells of 5-120 , which has INCN-2F end groups, reached PCE values of 8.85%, while solar cells of 5 - 121 (IDT-T), with INCN groups, had a PCE of 6.36% (both in blend with PBDB-T) . Li et al developed NFAs with new electron-withdrawing groups based on difluoroboron­(III)­β-diketonate . Energy levels, particularly the LUMOs of compounds 5-122 (3, with a para -CF 3 -phenyl group) and 5-123 (4, with a para -CN-phenyl group) are upshifted in comparison to compounds with INCN-based end groups ( 5-119 – 5-121 ); thus, also the optical band gaps are larger (1.69 eV/1.59 eV).…”

“…Li et al developed NFAs with new electron-withdrawing groups based on difluoroboron­(III)­β-diketonate . Energy levels, particularly the LUMOs of compounds 5-122 (3, with a para -CF 3 -phenyl group) and 5-123 (4, with a para -CN-phenyl group) are upshifted in comparison to compounds with INCN-based end groups ( 5-119 – 5-121 ); thus, also the optical band gaps are larger (1.69 eV/1.59 eV). Solar cells with J61 as a donor had moderate PCEs of 3.17% ( 5-122 ) and 4.06% ( 5-123 ) .…”

“…Energy levels, particularly the LUMOs of compounds 5-122 (3, with a para -CF 3 -phenyl group) and 5-123 (4, with a para -CN-phenyl group) are upshifted in comparison to compounds with INCN-based end groups ( 5-119 – 5-121 ); thus, also the optical band gaps are larger (1.69 eV/1.59 eV). Solar cells with J61 as a donor had moderate PCEs of 3.17% ( 5-122 ) and 4.06% ( 5-123 ) . Modification of the IDT central core by the introduction of an additional alkoxy substituent on the terminal thiophene rings leads to 5-124 (IDTOT2F) and 5-125 (IDTO-T-4F), which differ from each other by the length of the alkyl chain (hexyl, octyl).…”

Boron‐Thioketonates: A New Class of S,O‐Chelated Boranes as Acceptors in Optoelectronic Devices

“…Owing to the rich photophysical properties, tetra‐coordinated boron compounds gained attention in making various optoelectronic materials. For instance, Yam and co‐workers [10] demonstrated the potential of boron‐β‐diketonates in making electronic memory storage, and organic solar cells, Ono and co‐workers [11] synthesized various BF 2 ‐complexes (tetracene, perylene, octafluorotetracene, and π‐extended diketones) and studied their electron‐conducting behavior in organic field‐effect transistors. Herein, we report the design, synthesis, and characterization of a new class of boron compounds viz.…”