Wide-bandgap organic nanocrystals with high mobility and tunable lasing emission

Journal of Materials Chemistry C ◽

10.1039/d0tc05309k ◽

2021 ◽

Author(s):

Yin-Xiang Li ◽

Wei Liu ◽

Meng-Na Yu ◽

Xue-Mei Dong ◽

Chang-Jin Ou ◽

...

Keyword(s):

Charge Transport ◽

High Mobility ◽

Wide Bandgap ◽

Strong Emission ◽

Organic Nanocrystals ◽

Dual Color ◽

Efficient Charge

Wide-bandgap organic nanocrystals are developed. The strong emission, efficient charge transport and tunable dual-color lasing characters indicate their superior photoelectric integrated property toward potential multifunctional applications.

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Charge-transport in Organic Semiconductors: Probing High Mobility with Light

MRS Proceedings ◽

10.1557/opl.2013.1027 ◽

2013 ◽

Vol 1568 ◽

Author(s):

Demetrio A da Silva Filho ◽

Pedro Henrique de Oliveira Neto ◽

M. Carmen Ruiz Delgado ◽

Juan T. Lopez Navarrete ◽

Juan Casado

Keyword(s):

Charge Transport ◽

Organic Semiconductors ◽

High Mobility ◽

Charge Carriers ◽

Experimental Result ◽

Mobility Of Charge Carriers ◽

Vis Spectroscopy ◽

Efficient Charge ◽

Processing Techniques ◽

Improve Device

ABSTRACTEfficient charge transport is key to the operation of the various devices based on organic semiconductors, such as OLEDs, OPVs and OFETs. Both academia and industry are investing heavily in the development of new organic materials and processing techniques to improve device performance. An important parameter to tweak is the mobility of charge carriers. Triggered by an experimental result, here we investigate whether this parameter can be probed indirectly using UV-VIS spectroscopy. This would simplify the process of characterization and optimization of the mobility in amorphous molecular films, for example.

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Experimental evidence that short-range intermolecular aggregation is sufficient for efficient charge transport in conjugated polymers

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.1501381112 ◽

2015 ◽

Vol 112 (34) ◽

pp. 10599-10604 ◽

Cited By ~ 115

Author(s):

Suhao Wang ◽

Simone Fabiano ◽

Scott Himmelberger ◽

Skomantas Puzinas ◽

Xavier Crispin ◽

...

Keyword(s):

Charge Transport ◽

Carrier Mobility ◽

High Mobility ◽

Charge Carrier Mobility ◽

Polymer Chains ◽

Semiconducting Polymers ◽

Local Order ◽

Low Concentrations ◽

Efficient Charge ◽

Classic Approach

Efficiency, current throughput, and speed of electronic devices are to a great extent dictated by charge carrier mobility. The classic approach to impart high carrier mobility to polymeric semiconductors has often relied on the assumption that extensive order and crystallinity are needed. Recently, however, this assumption has been challenged, because high mobility has been reported for semiconducting polymers that exhibit a surprisingly low degree of order. Here, we show that semiconducting polymers can be confined into weakly ordered fibers within an inert polymer matrix without affecting their charge transport properties. In these conditions, the semiconducting polymer chains are inhibited from attaining long-range order in the π-stacking or alkyl-stacking directions, as demonstrated from the absence of significant X-ray diffraction intensity corresponding to these crystallographic directions, yet still remain extended along the backbone direction and aggregate on a local length scale. As a result, the polymer films maintain high mobility even at very low concentrations. Our findings provide a simple picture that clarifies the role of local order and connectivity of domains.

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