Luminescent Organic Semiconducting Langmuir Monolayers

• DOI: 10.1021/acsami.7b01919
• Publication Date: 2017-05-10T15:03:17Z
• Authors: Elena V. Agina; Artur A. Mannanov; Alexey S. Sizov; Olga Vechter; Oleg V. Borshchev; Artem V. Bakirov; Maxim A. Shcherbina; Sergei N. Chvalun; Vladislav G. Kons...; Vladimir V. Bruevich; Oleg V. Kozlov; Maxim S. Pshenich...; Dmitry Yu. Paraschuk; Sergei A. Ponomar...
• Keywords: EFFICIENCY; LOW-VOLTAGE; DERIVATIVES; 02 engineering and technology; Langmuir-Blodgett and Langmuir-Schaefer monolayers; OFETs; organic electronics; SELF-ASSEMBLED MONOLAYERS; BLODGETT-FILMS; MOBILITY; photoluminescence; FIELD-EFFECT TRANSISTORS; DIODES; 0210 nano-technology; LIGHT-EMITTING TRANSISTORS; thiophene-phenylene co-oligomers; CIRCUITS

In recent years, monolayer organic field-effect devices such as transistors and sensors have demonstrated their high potential. contrast, electroluminescent are still in infancy. One of the key challenges here is to create an material that self-organizes a combines efficient charge transport with luminescence. Herein, we report novel organosilicon derivative oligothiophene–phenylene dimer D2-Und-PTTP-TMS (D2, tetramethyldisiloxane; Und, undecylenic spacer; P, 1,4-phenylene; T, 2,5-thiophene; TMS, trimethylsilyl) meets these requirements. The self-assembled Langmuir monolayers were investigated by steady-state time-resolved photoluminescence spectroscopy, atomic force microscopy, X-ray reflectometry, grazing-incidence diffraction, semiconducting properties evaluated transistors. We found best uniform, fully covered, highly ordered semiconducting. Thus, two-dimensional (2D) packing conjugated molecules compatible its high-yield luminescence, so 2D molecular aggregation per se does not preclude luminescent properties. Our findings pave way rational design functional materials for light-emitting other optoelectronic devices.