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923192

Sigma-Aldrich

Spiro-TTB

greener alternative

≥99% (HPLC)

Synonym(s):

2,2′,7,7′- Tetrakis(N,N′-di-p-methylphenylamino)-9,9′-spirobifluorene, 2,2′,7,7′-Tetra(N, N-di-tolyl)amino-spiro-bifluorene, 2,2′,7,7′-Tetra(N,N-di-p-tolyl)amino-9,9-spirobifluorene, 2,2′,7,7′-Tetra(N,N-ditolylL)amino-9,9-spiro-bifluorene, 2,2′,7,7′-Tetrakis(di-p-tolylamino)-9,9′-spirobi[fluorene], 2,2′,7,7′-Tetrakis(di-p-tolylamino)spiro-9,9′-bifluorene, N2,N2,N2′,N2′,N7,N7,N7′,N7-Octa-p-tolyl-9,9′-spirobi[fluorene]-2,2′,7,7′-tetraamine

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About This Item

Empirical Formula (Hill Notation):
C81H68N4
CAS Number:
Molecular Weight:
1097.43
MDL number:
NACRES:
NA.23

description

PL:409 nm (in THF)
TGA:> 360 °C (0.5% weight loss)
Tg: 146 °C

Quality Level

Assay

≥99% (HPLC)

mol wt

average mol wt 1097.43 g/mol

greener alternative product characteristics

Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.

sustainability

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loss

0.5% TGA, >360°C

transition temp

Tg 146 °C

solubility

THF: soluble

λmax

385 nm in THF

Orbital energy

HOMO 5.2 eV 
LUMO 1.9 eV 

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General description

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Application

Spiro-TTB is a high-mobility organic semiconductor with strong donor character given its four substituted arylamine moieties that stabilize positively charged cationic states via mesomeric effects.
It has been successfully applied as transparent hole-transparent layer in solar cells, organic field-effect transistors (OFETs), and organic light emitting devices (OLEDs). In photovoltaics, spiro-TTB was used as organic hole selective layer between perovskite and the silicon cells, contributing to a 25.2% efficency perovskite/ silicon tandem solar cell. When used in OLEDs, spiro-TTB enabled applications in organic photodetectors (OPDs), imaging and lasing applications.
Spiro-TTB is used as a hole transport material in OLED devices, organic photovoltaics (OPVs), organic field-effect transistors (OFETs) and perovskite solar cells. It exhibits excellent hole injection and transport properties, enabling efficient charge transport from the anode to the emitting layers of the OLED structure. This contributes to improved device performance, stability, and overall efficiency.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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