Organic nanocrystals (NCs) are in the mesoscopic phase between a single molecule and the corresponding bulk crystals, and are expected to exhibit peculiar optical properties, depending on crystal size and shape. In the present Award Accounts, recent progress on hybridized organic NCs and ordered array structure of encapsulated organic NCs will be introduced in detail for optically functional materials toward next-generation organic device application. Hybrid material (or hybridization) is an important area in current material science. Our attention is now focused on coreshell type hybridized organic NCs, which seem to be the best suited nanostructure for providing novel optoelectronic properties and photonic function induced by coreshell interface interaction. On the other hand, it may be necessary to arrange and integrate organic NCs, including hybridized materials, on a substrate so as to receive and transmit input and output signals by electronically and/or optically accessing organic devices. Hence, encapsulations of organic NCs, patterned substrates, and tapered cell method have been employed suitably to fabricate and control ordered array structure of organic NCs on a substrate. Finally, the future scope in the relevant fields of optoelectronics and photonics will be discussed in brief.
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