TSPO1

TSPO1, diphenyl[4-
With a sufficiently high triplet energy (ET ) of 3.36 eV, TSPO1 can be used as fluorescent host or exciton blocking layer materials in TADF-OLED devices. Also with low lying LUMO (ELUMO = 2.52 eV) and HOMO (EHOMO = 6.79 eV), TSPO1 is suitable for efficient electron injection and hole blocking, owing to the electron deficient nature of diphenylphosphine oxide moiety it bears.
General Information
CAS number | 1286708-86-8 |
Full name | Diphenyl[4- |
Chemical formula | C36H29OPSi |
Molecular weight | 536.67 g/mol |
Absorption | λmax 266 nm in DCM |
Photoluminescence | λmax 322 nm in DCM |
HOMO/LUMO | HOMO = 6.79 eV, LUMO = 2.52 eV; ET = 3.36 eV [1] |
Synonyms | Diphenylphosphine oxide-4-(triphenylsilyl)phenyl |
Classification / Family | Triphenylsilyl derivatives, Bipolar host materials, Electron Injection layer (EIL) materials, Hole Blocking layer (HBL) materials, Fluorescent host materials, TADF materials, Organic printing electronics. |
Product Details
Purity | Sublimed > 99% (HPLC) |
Melting point | 236 °C (lit.) |
Appearance | White crystals/powder |
Chemical Structure

Device Structure(s)
Device structure | ITO/HATCN (7nm)/TAPC (40 nm)/DCDPA (10 nm)/CzCbPy: 20 wt% DMAC-DPS (25 nm)/TSPO1 (5 nm)/TPBi (30 nm)/LiF (1.5 nm)/Al (100 nm) [2] |
Colour | Deep Blue ![]() |
Max. Luminance | 8,035 cd/m2 |
Max. Current Efficiency | 35.0 cd/A |
Max. EQE | 22.9% |
Device structure | ITO/HATCN (5 nm)/NPB (60 nm)/MCP (5 nm)/15 wt% PXZ-CMO:mCP (30 nm)/TSPO1 (5 nm)/TPBi (30 nm)/LiF (0.5 nm)/Al (150 nm) [3] |
Colour | Green ![]() |
Max. Luminance | 8,124 cd/m2 |
Max. Current Efficiency | 38.2 cd/A |
Max. EQE | 12.1% |
Device structure | PEDOT:PSS (60 nm)/TAPC (20 nm)/mCP (10 nm)/DPEPO: TmCzTrz (25 nm)/TSPO1 (5 nm)/TPBI (20 nm)/LiF (1 nm)/Al (200 nm) [4] |
Colour | Blue ![]() |
Max. Power Efficiency | 52.1 Im/W |
Max. EQE | 25.5% |
Device structure | ITO (50 nm)/PEDOT:PSS (60 nm)/poly(9-vinylcarbazole) (15 nm)/SiCz:4CzIPN (30 nm)/TSPO1 (35 nm)/LiF (1 nm)/Al (200 nm) [5] |
Colour | Green ![]() |
Max. Power Efficiency | 63.4 Im/W |
Max. EQE | 26% |
Device structure | ITO/MoO3 (2 nm)/TAPC (40 nm)/TCTA (10 nm)/CzSi (3 nm)/CzSi:Pd-B-1* (10%):TTPA (1%) (20 nm)/TSPO1 (10 nm)/TmPyPb (40 nm)/LiF (1.2 nm)/Al (150 nm) [6] |
Colour | Green ![]() |
Max Current Efficiency | 38.85 cd/A |
Max EQE | 10.41% |
Max. Power Efficiency | 38.14 lm W-1 |
Device structure | ITO (50 nm)/NPD (40 nm)/TCTA (15 nm)/mCP) (15 nm)/1 wt% DABNA-2*:mCBP(20 nm)/TSPO1 (40 nm)/LiF (1 nm)/Al (100 nm) [7] |
Colour | Blue ![]() |
Max. Current Efficiency | 21.1 cd/A |
Max. EQE | 20.2% |
Max. Power Efficiency | 15.1 lm W−1 |
Device structure | ITO (50 nm)/NPD (40 nm)/TCTA (15 nm)/mCP) (15 nm)/1 wt% DABNA-2*:mCBP(20 nm)/TSPO1 (40 nm)/LiF (1 nm)/Al (100 nm) [8] |
Colour | Yellow ![]() |
Max. Current Efficiency | 66.2 cd/A |
Max. EQE | 23.2% |
Max. Power Efficiency | 56.2 lm W−1 |
Device structure | ITO (120 nm)/PEDOT:PSS (60 nm)/TAPC (10 nm)/TCTA (10 nm)/mCP (10 nm)/DPEPO:DMAC-DPS:TBRb (25 nm)/TSPO1 (5 nm)/TPBI (30 nm)/LiF (1 nm)/Al (200 nm) [9] |
Colour | White ![]() |
Max Current Efficiency | 39.3 cd/A |
Max EQE | 17.6% |
Max. Power Efficiency | 41.0 lm W-1 |
*For chemical structure information, please refer to the cited references
Pricing
Grade | Order Code | Quantity | Price |
Sublimed (>99% purity) | M2199A1 | 100 mg | £199.00 |
Sublimed (>99% purity) | M2199A1 | 250 mg | £399.00 |
Sublimed (>99% purity) | M2199A1 | 500 mg | £678.00 |
Sublimed (>99% purity) | M2199A1 | 1 g | £1130.00 |
MSDS Documentation
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 (2015); DOI: 10.1039/c5tc01638j.
- δ-Carboline-based bipolar host materials for deep blue thermally activated delayed fluorescence OLEDs with high efficiency and low roll-off characteristic, J. Moon et al., RSC Adv., 8, 17025 (2018); DOI: 10.1039/c8ra01761a.
- Suppressing Efficiency Roll-Off of TADF Based OLEDs by Constructing Emitting Layer With Dual Delayed Fluorescence, Y. Zhang et al., Front. Chem., 7, 302 (2019); doi: 10.3389/fchem.2019.00302.
- Design Strategy for 25% External Quantum Effi ciency in Green and Blue Thermally Activated Delayed Fluorescent Devices, D. Lee et al., Adv. Mater. 2015, 27, 5861–5867 (2015); DOI: 10.1002/adma.201502053.
- High Efficiency in a Solution-Processed Thermally Activated Delayed-Fluorescence Device Using a Delayed-Fluorescence Emitting Material with Improved Solubility, Y-J. Cho et al., Adv. Mater., 26, 6642–6646 (2014); DOI: 10.1002/adma.201402188.
- Highly luminescent palladium(II) complexes with sub-millisecond blue to green phosphorescent excited states. Photocatalysis and highly efficient PSF-OLEDs, P-K. Chow et al., Chem. Sci., 7, 6083-6098 (2016); DOI: 10.1039/C6SC00462H.
- High efficiency (~ 100 lm W-1) hybrid WOLEDs by simply introducing ultrathin non-doped phosphorescent emitters in a blue exciplex host, S, Ying et al., J. Mater. Chem. C, 6, 7070 (2018); DOI: 10.1039/c8tc01736k.
- Aromatic-Imide-Based Thermally Activated Delayed Fluorescence Materials for Highly Efficient Organic Light-Emitting Diodes, M. Li et al., Angew. Chem. Int. Ed., 56, 8818 –8822 (2017); DOI: 10.1002/anie.201704435.
- High efficiency fluorescent white organic light-emitting diodes having a yellow fluorescent emitter sensitized by a blue thermally activated delayed fluorescent emitter, W. Song et al., Org. Electron., 23, 138–143 (2015); doi: 10.1016/j.orgel.2015.04.016.
- External Quantum Efficiency Above 20% in Deep Blue Phosphorescent Organic Light‐Emitting Diodes, S. Jeon et al., adv. mater., 23, 1436 (2011); DOI: 10.1002/adma.201004372.
To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.