We synthesised 12,12-diisopropyl-7-methyl-12H-indololo[3,2-d]-naphtho[1,2-b][1]silole from 1-bromo-2-naphtholvia four steps. The silylene-bridged 2-(2-naphthyl)indole exhibited intense blue photoluminescence in solution and in the solid state. For example, the fluorescence maximum of the powder appeared at 476 nm with a high quantum yield (Φ = 0.70). The organic light-emitting device using the silylene-bridged indole as a light-emitting layer demonstrated a high current efficiency of 3.80 cd A−1 and a power efficiency of 3.64 lm W−1 at 10 mA cm−2 with excellent colour coordinates (0.152, 0.094), while the device fabricated with the blue-emissive indole as a dopant achieved even higher current and power efficiencies of 6.68 cd A−1 and 5.58 lm W−1, respectively, at 10 mA cm−2.
我们通过四个步骤从
1-溴-2-萘酚合成了 12,12-
二异丙基-7-甲基-1
2H-吲哚并[3,2-d]-
萘并[1,2-b][1]
硅烯。
硅烯桥接的
2-(2-萘基)吲哚在溶液和固态中都表现出强烈的蓝色光致发光。例如,粉末的荧光最大值出现在 476 纳米波长处,量子产率很高(Φ = 0.70)。使用
硅烯桥
吲哚作为发光层的有机发光器件在 10 mA cm-2 条件下的电流效率高达 3.80 cd A-1,功率效率为 3.64 lm W-1,色坐标(0.152,0.094)极佳;而使用蓝色发光
吲哚作为掺杂剂制造的器件在 10 mA cm-2 条件下的电流效率和功率效率更高,分别达到 6.68 cd A-1 和 5.58 lm W-1。