Tailor-Made Highly Luminescent and Ambipolar Transporting Organic Mixed Stacked Charge-Transfer Crystals: An Isometric Donor–Acceptor Approach

Abstract

We have rationally designed a densely packed 1:1 donor-acceptor (D-A) cocrystal system comprising two isometric distyrylbenzene- and dicyanodistyrylbenzene-based molecules, forming regular one-dimensional mixed stacks. The crystal exhibits strongly red-shifted, bright photoluminescence originating from an intermolecular charge-transfer state. The peculiar electronic situation gives rise to high and ambipolar p-/n-type field-effect mobility up to 6.7 × 10(-3) and 6.7 × 10(-2) cm(2) V(-1) s(-1), respectively, as observed in single-crystalline OFETs prepared via solvent vapor annealing process. The unique combination of favorable electric and optical properties arising from an appropriate design concept of isometric D-A cocrystal has been demonstrated as a promising candidate for next generation (opto-)electronic materials.

In-Situ GISAXS Study of Supramolecular Nanofibers having Ultrafast Humidity Sensitivity

“…Development of organic materials using supramolecular design stratergies 8–10 to achieve novel functionalities has been in the forefront of research interest 11–15 . Supramolecular materials are relatively new class of organic materials which are considered as promising candidates for various applications such as solar cells 16–19 , sensors 20, 21 , FETs 11, 12, 22–26 etc. Interactions in these materials benefit from the intermediate size regime (few tens of nm to µm) that lies between single molecule (few nm) and polymer thin films (~µm) 11 which enable easy fabrication.…”

Mixed-stack architecture and solvatomorphism of trimeric perfluoro-ortho-phenylene mercury complexes with dithieno[3,2-b:2′,3′-d]thiophene

“…Mixed-stack donor-acceptor co-crystals recently attracted attention as charge-transporting materials for organic electronics [1][2][3][4][5] and as room-temperature ferroelectrics [6]. Their semiconducting properties are also a subject of theoretical studies [2,7].…”

Freezing-in orientational disorder induces crossover from thermally-activated to temperature-independent transport in organic semiconductors

“…Examples include metal-insulator transitions, neutral-ionic transitions, Peierls transitions and transitions to a ferroelectric state [3][4][5][6][7][8][9][10][11][12][13] . Historically, these complexes were of interest due to the prediction of room temperature superconductivity or metallic conductivity 14 ; more recently, they have proven to be an excellent medium for the study of novel application-oriented properties such as photoconductivity, tunable semiconductivity, ferroelectricity, magnetoresistance and field emission 3,4,[15][16][17][18][19][20][21][22][23][24][25][26] . Such properties are highly coupled to the crystalline structure of these molecular solids.…”