Donor-acceptor polymeric inks with transition-metal dichalcogenide nanosheet suspensions for inkjet-printed thin-film transistors
Source abstract
Abstract
This study investigates molybdenum disulfide (MoS 2) suspension to enhance the charge transport properties of the donor-acceptor co-polymer (DA copolymers) semiconductor diketopyrrolopyrrole thieno[3,2- b]thiophene (DPPT-TT) for inkjet-printed thin-film transistor (TFT) fabrication. A mixture of MoS 2 nanosheets mixed in the DA copolymer was developed and inkjet printed for the fabrication of TFT devices. The I– V measurements of the fabricated TFTs indicated that the addition of MoS 2 suspension (0.5 wt%) into the polymer matrix resulted in the improvement of carrier mobility in both hole and electron transport, with an increase of 52 % and 130 %, respectively, compared to devices without the nanosheets. The improved electrical behavior was not entirely due to transport through the single crystal nanosheets. The introduced MoS 2 nanosheets also induced strongly aggregated polymeric domains in the thin film compared to pristine films without the suspension, resulting in a high degree of molecular ordering within the polymeric film. The origin of the improved microstructure of DPPT-TT-based thin films was analyzed using AFM, UV–vis–NIR, and XRD systems. The structural results were shown to correlate with the electrical behavior, further demonstrating the efficacy of the MoS 2 nanosheets on the enhancement of the TFT performance.
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Research context
OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Organic Electronics and Photovoltaics · ZnO doping and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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