Crystallization of thiophene/phenylene co-oligomers by dropping of their solutions into poor solvents

Improvement in thermal stability of solar cell using a non-fullerene n-type liquid crystalline semiconductor

“…The development of several π-conjugated oligomers has contributed to the advancement of organic optical and electronic devices. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] For example, bis-styrylbenzene derivatives (BSDs) and thiophene/phenylene co-oligomers (TPCOs) show remarkable optical and electrical characteristics. Various studies have reported the excellent photophysical properties of BSDs and TPCOs, where 1,4-bis(4trifluoromethylstyryl)benzene and α,ω-bis(biphenylyl) terthiophene (BP3T) show very low amplified spontaneous emission thresholds.…”

Growth of alkyl-monosubstituted thiophene/phenylene co-oligomer crystals and their device application

“…[5][6][7][8][9][10][11][12][13][14] On the other hand, we have investigated the electrical and optical properties of small-molecule organic semiconductors, thiophene=phenylene co-oligomers (TPCOs), and applied them to optoelectronic devices. [15][16][17] By virtue of the excellent crystallinity of most TPCOs, their single crystals were grown in a liquid [18][19][20] or vapor phase 21,22) and used as an active layer of OFETs. 19,[22][23][24][25] However, even though a few methods are available for liquid phase crystal growth, [18][19][20] unsubstituted TPCOs are poorly soluble, which makes the solution process difficult.…”

“…[15][16][17] By virtue of the excellent crystallinity of most TPCOs, their single crystals were grown in a liquid [18][19][20] or vapor phase 21,22) and used as an active layer of OFETs. 19,[22][23][24][25] However, even though a few methods are available for liquid phase crystal growth, [18][19][20] unsubstituted TPCOs are poorly soluble, which makes the solution process difficult. Recently, soluble TPCOs have been designed and synthesized by introducing alkyl substituents to one or two molecular terminals, 14,26) and their device characteristics were reported for vacuum-deposition and crystalline films prepared by solution casting and skimming.…”

Emission behavior of trifluoromethyl bis-styrylbenzene derivative

“…[1][2][3] This leads to the enhancement of the optical and electronic characteristics of organic compounds. [4][5][6][7][8][9][10][11][12][13][14][15] Among functional organic compounds, some compounds having a bis-styrylbenzene skeleton show high crystallization based on their planar structure, which is composed of benzene rings and carbon double bonds. Unsubstituted poly( p-phenylene vinylene) (PPV) also has the bis-styrylbenzene skeleton in its main chain and exhibits high crystallization, resulting in high electronic conductivity.…”