Tuning charge transport in organic semiconductors with nanoparticles and hexamethyldisilazane

He, Zhengran; Zhang, Ziyang; Bi, Sheng; Chen, Jihua

doi:10.1007/s11051-021-05151-2

Cited by 8 publications

(4 citation statements)

References 74 publications

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“…In this work, we chose the well‐known TIPS pentacene organic semiconductor as an example, mainly due to its improved solubility and intensified π‐π stacking, to study the effect of the binary solvent on the semiconductor crystallization. TIPS pentacene adopts a face‐to‐face packing pattern with intensified π‐π stacking, benefiting charge transport of the organic semiconductor [72–73] …”

Section: Resultsmentioning

confidence: 99%

“…TIPS pentacene adopts a face-toface packing pattern with intensified π-π stacking, benefiting charge transport of the organic semiconductor. [72][73] The selection of solvents exerts a significant impact not only on the organic semiconductor solubility, but also on the nuclei formation, [74] semiconductor crystallization, [75][76] crystal alignment, [77][78] vertical phase separation, [79] thin film morphology, [80] and charge carrier mobility. [69][70] The conformational flexibility from the TIPS pentacene triisopropylsilyl side groups results in improved solubility in hydrophobic solvents such as toluene and chlorobenzene.…”

Section: Resultsmentioning

confidence: 99%

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A Green Binary Solvent Method to Control Organic Semiconductor Crystallization

Sun

Zhou

et al. 2023

ChemistrySelect

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While solution‐processed small‐molecular organic semiconductors have been reported with significant research progress, their random crystal orientations and abundant defects at grain boundaries remain as a major obstacle to achieving high performance in organic electronic devices. In this paper, we demonstrate a binary solvent method that comprises a green solvent to manipulate the crystal alignment, morphology and charge transport of organic semiconductors. 6,13‐bis(triisopropylsilylethynyl) pentacene (TIPS pentacene) was studied as an example to showcase the enlargement of grain width and millimeter‐scale alignment of organic crystals based on the toluene/n‐amyl acetate binary solvents. At an optimized volume ratio of 3 : 1, the toluene/n‐amyl acetate binary solvent gave rise to a 4‐fold reduction in misorientation angle and approximately 40 % increase in the grain width. UV‐visible spectroscopy confirmed strong H‐aggregations with more favorable intrachain interaction and charge transport in TIPS pentacene. X‐ray diffraction showed enhanced peak intensities in (00 l) type of reflections and improved film crystallinity. Finally, thin film transistors were demonstrated to test the charge transport in the TIPS pentacene organic crystals. This work demonstrates the binary green solvent method can effectively regulate the organic semiconductor crystallization and alignment even in the absence of external alignment techniques such as solution shearing, and thereby sheds light on advancing facile organic electronic applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

A Green Binary Solvent Method to Control Organic Semiconductor Crystallization

Sun

Zhou

et al. 2023

ChemistrySelect

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“…Crystal alignment: as mentioned above, solution based growth of organic semiconductors can result in inferior crystal alignment. Poor crystal alignment can further cause considerable mobility variations as measured from a batch of transistor devices, [124][125][126][127][128][129][130][131] which make them infeasible for flexible electronics applications. By intentionally aligning the crystal orientation at different angles to the direction from the source to drain contacts, the mobility variations can reach one order of magnitude.…”

Section: Binary Solvent Effect On Crystallizationmentioning

confidence: 99%

Binary solvent engineering for small-molecular organic semiconductor crystallization

Zhang

Asare‐Yeboah

et al. 2023

Mater. Adv.

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“…First, when drop casted in solution, TIPS pentacene forms dendritic patterns of crystal ribbons, which can be characterized by considerable crystal misorientation and film gaps [87][88][89][90][91][92][93][94][95][96][97][98]. In a pivotal study conducted by Chen and coworkers [99], the misorientation angle θ was measured between the TIPS pentacene crystal long axis and the direction from source to drain contact electrodes in the transistor device.…”

Section: Challenges In Controlling Organic Semiconductor Crystallizationmentioning

confidence: 99%