Wafer-scale single crystals, by virtue of their intrinsically high crystallinity and compatibility on wafer-scale processing size, have been extensively studied and applied in various electronics and optoelectronics. In this review,...
Organic nonvolatile transistor memory with synthetic polypeptide derivatives as dielectric was fabricated by a solution process. When only poly (γ-benzyl-l-glutamate) (PBLG) was used as dielectric, the device did not show obvious hysteresis in transfer curves. However, PBLG blended with PMMA led to a remarkable increase in memory window up to 20 V. The device performance was observed to remarkably depend on the blend ratio. This study suggests the crystal structure and the molecular alignment significantly affect the electrical performance in transistor-type memory devices, thereby provides an alternative to prepare nonvolatile memory with polymer dielectrics.
The blending of π-conjugated molecules with polymeric semiconductors is an effective strategy to promote the charge carrier mobility because of the transmission path by the conductive polymers through electrical bridge connection of the small organic molecule crystalline domain. In this work, pentacene single crystal was prepared to induce the molecular orientation of polymeric semiconductor PDPP2T-TT-OD, which led to an enhanced eld-effect mobility of the organic thin-lm transistor (OTFTs) by improving the crystallinity due to nucleation and growth phase separation. Besides, with the addition of antisolvents, the crystallization of the blend lm was further improved, 27 times higher than that of a pure polymer semiconductor-based OTFTs. That was because the pentacene nuclei induced polymer crystallization through π-π interactions and the addition of antisolvent promoted the aggregation of polymer chains in solution, enabling the molecular chains packed more closely in solid lms. Therefore, the chain arrangement of polymers induced via small molecular single crystals provides a new idea to improve mobility in composite semiconductor thin lms for the construction of novel organic optoelectronic devices.
The blending of π-conjugated molecules with polymeric semiconductors is an effective strategy to promote the charge carrier mobility because of the transmission path by the conductive polymers through electrical bridge connection of the small organic molecule crystalline domain. In this work, pentacene single crystal was prepared to induce the molecular orientation of polymeric semiconductor PDPP2T-TT-OD, which led to an enhanced field-effect mobility of the organic thin-film transistor (OTFTs) by improving the crystallinity due to nucleation and growth phase separation. Besides, with the addition of anti-solvents, the crystallization of the blend film was further improved, 27 times higher than that of a pure polymer semiconductor-based OTFTs. That was because the pentacene nuclei induced polymer crystallization through π-π interactions and the addition of antisolvent promoted the aggregation of polymer chains in solution, enabling the molecular chains packed more closely in solid films. Therefore, the chain arrangement of polymers induced via small molecular single crystals provides a new idea to improve mobility in composite semiconductor thin films for the construction of novel organic optoelectronic devices.
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