UGH3, 1,3-bis(triphenylsilyl)benzene, is an isomer to UGH-2, 1,4-bis(triphenylsilyl)benzene.
UGH3 is an ultrahigh energy gap (4.40 eV) organosilicon compounds and a weak electron-transport-type host for highly efficient blue PHOLEDs. UGH3 has a high triplet energy (ET=3.1 eV) and can also be used as a host material to dilute exciplex to enhance TADF-OLED optical and electrical device performance. Having a deep HOMO energy level (7.2 eV), UGH3 can also be used as an effective hole blocking layer material.
Both UGH2 and UGH3 have low glass transition temperatures (Tg) below 100 °C, BSB, 4,4'-di(triphenylsilyl)-biphenyl, however, offers better morphology of OLED device films for higher device performance and stability with higher Tg at 100 °C.
|Molecular weight||594.89 g/mol|
|Absorption||λmax 265 nm in THF|
||λem 418 nm|
|HOMO/LUMO||HOMO = 7.20 eV, LUMO = 2.80 eV, ET =3.1 eV |
|Full chemical name||1,3-Bis(triphenylsilyl)benzene|
|Classification / Family||Phosphorescent blue host material, Hole blocking materials, Sublimed materials|
|Purity||Sublimed >99.0% (HPLC)|
|Melting point||Tg = 46 °C, TGA: >280 °C (0.5% weight loss)|
*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the sublimed materials for OLED devices page.
|Device structure||ITO (70 nm)/NPB (40 nm)/mCP (7.5 nm)/UGH3:FIrpic:Bt2Ir(acac) (14%, 0.3%) (30 nm)/UGH3 (5 nm)/Bphen (50 nm)/LiF (1 nm)/Al (120 nm) 
|Max. Current Efficiency||47.5 cd/A|
|Max. EQE||18.9 %|
|Max. Power Efficiency||36.6 Im/W|
|Device structure||ITO (70 nm)/NPB (40 nm)/mCP (7.5 nm)/UGH3:mCP (7:3):14 wt%FIrpic:0.3 wt% Bt2Ir(acac) (30 nm)/UGH3 (5 nm)/Bphen (50 nm)/LiF (1 nm)/Al (120 nm) 
|Max. Current Efficiency||47.6 cd/A|
|Max. EQE||18.9 %|
|Max. Power Efficiency||40.9 Im/W|
|Device structure||ITO/NPB (40 nm)/TSBPA (10 nm)|TSBPA:PO-T2T 1:1 in 50 vol % UGH-3 (40 nm)|POT2T (50 nm)|LiF (1 nm)|Al (100 nm) 
|Max. EQE||19.2 %|
|Sublimed(>99.0% purity)||M2270A1||100 mg||£189.00|
|Sublimed(>99.0% purity)||M2270A1||250 mg||£378.00|
|Sublimed(>99.0% purity)||M2270A1||500 mg||£599.00|
|Sublimed(>99.0% purity)||M2270A1||1 g||£980.00|
Literature and Reviews
- Arylsilanes and siloxanes as optoelectronic materials for organic light-emitting diodes (OLEDs), D. Sun et al., J. Mater. Chem. C, 3, 9496-9508 (2015); DOI: 10.1039/C5TC01638J.
- Improved Performance of White Phosphorescent Organic Light-Emitting Diodes through a Mixed-Host Structure, ETRI. J., 31 (6), 642-646 (2009); J. Lee et al., DOI: 10.4218/etrij.09.1209.0005.
- Less Is More: Dilution Enhances Optical and Electrical Performance of a TADF Exciplex, M. Colella et al., J. Phys. Chem. Lett., 10, 793−798 (2019); DOI: 10.1021/acs.jpclett.8b03646.
- Ultrahigh Energy Gap Hosts in Deep Blue Organic Electrophosphorescent Devices, X. Ren et al., Chem. Mater., 16, 23, 4743–4747 (2004); DOI: 10.1021/cm049402m.
- Identifying the Factors That Lead to PLQY Enhancement in Diluted TADF Exciplexes Based on Carbazole Donors, M. Colella et al., J. Phys. Chem. C, 123 (28); DOI: 10.1021/acs.jpcc.9b03538.
- Enhanced efficiency and reduced roll-off in blue and white phosphorescent organic light-emitting diodes with a mixed host structure, J. Lee et al., Appl. Phys. Lett. 94, 193305 (2009); DOI: 10.1063/1.3136861.
To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, pharmaceuticals, cosmetics, food or commercial applications.