| Title |
Unlocking room temperature phosphorescence in dibenzothiophene-based systems via the Scholl reaction |
| Authors |
Fabregat, Clara ; Bujaldón, Roger ; Garcia-Amorós, Jaume ; Volyniuk, Dmytro ; Ghasemi, Melika ; Grazulevicius, Juozas V ; Velasco, Dolores |
| DOI |
10.1016/j.dyepig.2025.113053 |
| Full Text |
|
| Is Part of |
Dyes and pigments.. London : Elsevier. 2025, vol. 243, art. no. 113053, p. 1-10.. ISSN 0143-7208. eISSN 1873-3743 |
| Keywords [eng] |
diphenanthro[9,10-b:9',10'-d]thiophene ; Organic optoelectronics ; p-type semiconductors ; Room temperature phosphorescence ; White light |
| Abstract [eng] |
A family of butterfly-shaped diphenanthro[9,10-b:9′,10′-d]thiophene derivatives has been straightforwardly synthesized from tetrabromothiophene via consecutive Suzuki-Miyaura and Scholl reactions, targeting potential charge-transporting and light-emitting organic materials. Indeed, time of flight measurements displayed hole mobility values up to 4.7 × 10−5 cm2 V−1 s−1 under an applied electric field of 6 × 105 V cm−1. Spectroscopic studies showed promising photoluminescence, with quantum yields up to 27.5 % and adjustable emissions ranging from deep blue to sky blue in solution and in solid films, respectively. Moreover, the synthesized compounds revealed room-temperature phosphorescence when introduced as dopants in Zeonex films, a highly sought-after characteristic in metal- and halogen-free organic materials. This phenomenon delineates a spectral transition from deep blue to warm-white emission as the environment shifts from air-equilibrated to vacuum conditions, which entails different applications such as lighting or oxygen-sensing devices. Phosphorescence, which was further corroborated in dilute solutions of THF at 77 K, does not occur on the non-cyclized synthetic precursors, demonstrating the key role of the Scholl reaction to unlock it. These findings make evidence of the potential of this core for advancing optoelectronic device functionalities. |
| Published |
London : Elsevier |
| Type |
Journal article |
| Language |
English |
| Publication date |
2025 |
| CC license |
|
