中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2,7-二溴芴 | 2,7-dibromo-9H-fluorene | 16433-88-8 | C13H8Br2 | 324.015 |
2,7-二溴-9-芴酮 | 2,7-dibromofluorene-9-one | 14348-75-5 | C13H6Br2O | 337.998 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 4,4'-(2,7-dibiphenyl-4-yl-9H-fluorene-9,9-diyl)bis(N,N-diphenylaniline) | 1404363-94-5 | C73H52N2 | 957.229 |
—— | 4,4'-{2,7-bis[2-biphenyl-4-ylvinyl]-9H-fluorene-9,9-diyl}bis(N,N-diphenylaniline) | 1404363-95-6 | C77H56N2 | 1009.31 |
—— | 2,7-bis(pyren-1-yl)-9,9-bis(4-diphenylaminophenyl)fluorene | 1369432-56-3 | C81H52N2 | 1053.32 |
—— | 4,4'-(2,7-bis[4'-(9H-carbazol-9-yl)-2-methylbiphenyl-4-yl]-9H-fluorene-9,9-diyl)bis(N,N-diphenylaniline) | 1404363-99-0 | C99H70N4 | 1315.67 |
New small molecules based on 9,9-bis(4-diphenylaminophenyl)fluorene functionalized with triphenylamine moieties are developed for use as dopant-free hole transporting materials (HTMs) in planar inverted perovskite solar cells. Power conversion efficiencies (PCE) as high as 17.1% are obtained with good stability.
The development of high performance optically pumped organic lasers operating in the deep blue still remains a big challenge. In this paper, we have investigated the photophysics and the optical gain characteristics of a novel fluorene oligomer functionalized by four triphenylamine (TPA) groups. By ultrafast spectroscopy we found a large gain spectral region from 420 to 500 nm with a maximum gain cross-section of 1.5 × 10−16 cm2 which makes this molecule a good candidate for photonic applications. Amplified Spontaneous Emission measurements (ASE) under 150 fs and 3 ns pump pulses have revealed a narrow emission at 450 nm with a threshold of 5.5 μJcm−2 and 21 μJcm−2 respectively. Our results evidence that this new fluorene molecule is an interesting material for photonic applications, indeed the inclusion of TPA as a lateral substituent leads to a high gain and consequently to a low threshold blue organic ASE.
High performance green phosphorescent OLEDs using novel bromine-substituted compounds as hole transport layers were fabricated.