π-Conjugated poly(anthracene-alt-fluorene)s with X-shaped repeating units: New blue-light emitting polymers

Organic Sensitizers Featuring 9,10-Diaryl-Substituted Anthracene Unit

“…Once linked through its C9 and C10 sites, the whole molecule, as a result of the steric effect caused by the four hydrogen atoms at the C1, C2, C5 and C8 sites, would be twisted at the connecting positions of the anthracene and other aromatic rings, thus, hampering the effective intramolecular charge transfer (ICT) and being harmful to the performance of the corresponding DSCs . In contrast to this, the 2,6-linkage mode could keep relatively good planar configuration of the whole conjugated system and broaden its absorption spectrum, leading to good performance. − However, once again, good planar structure usually caused unwanted π–π stacking, resulting in possibly decreased performance. Thus, if these π–π interactions could be avoided to some degree, the energy conversion efficiencies might be improved, as partially confirmed by some related papers published recently. − For example, once incorporating the 2,6-conjugated 9,10-bishexyloxyanthracene unit as the conjugated bridge, the sensitizers gave conversion efficiencies in the range of 4.69–7.52% .…”

The dynamic organic p–n junction

“…[14][15][16][17][18][19][20][21][22] The nominal difference between an LEC and an OLED is that the former contains mobile ions in the active material. [23][24][25][26][27][28][29][30] These ions rearrange during operation, which in turn allows for a range of attractive device properties, including low-voltage operation with thick active layers and stable electrode materials. [31][32][33][34][35][36] However, the further development of LECs is currently hampered by an inadequate understanding of the device operation.…”

X‐ and H‐Shape Two Dimensional Conjugated Oligomers with Anthracene as the Node

“…Owing to its promising light-emitting and charge-transporting properties, anthracene has been widely used as a building block for conjugated small molecules, oligomers, and polymers. [18][19][20][21][22][23] Particularly, substituents can be introduced at four positions (2, 6, 9, and 10-positions) without spatial interference. According to a previous report, poly (2,6-anthrylene)s are well-conjugated polymers and steric hindrance between aryl substituents at 9,10-positions and anthracne can be released by using ethynyl linkages.…”