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Product Code B1421-5g
Price £145 ex. VAT

Indolo[2,3-a]carbazole, Heterocyclic building blocks

Used in the synthesis of TADF-OLED host and emitting layer materials, and anticancer drugs.


Specifications | MSDS | Literature and Reviews


Indolo[2,3-a]carbazole (CAS number 60511-85-5), an isomer to Indolo[3,2-b]carbazole, is consisted of one fused indole and carbazole with two pyrrole cloves facing the same direction. indolo[2,3-a]carbazole derivatives are known for their favourable properties such as good planarity, high thermal stability and excellent photophysical properties.

Highly efficient green PHOLED exhibiting an impressive operational lifetime of over 10,000 h with an initial luminance of 1,000 cd m-2 was achieved using 2-biphenyl-4,6-bis(12-phenylindolo[2,3-a]carbazol-11-yl)-1,3,5-triazine (PIC-TRZ) as the host, 20 times longer than the operational lifetime while the conventional host material CBP was used.

The majority of the naturally occurring indolo[2,3-a]carbazoles bear an additional annulated pyrrole unit to the benzene ring. Indolo[2,3-a]carbazole alkaloids has shown a great range of pharmacological effects such as antifungal, antimicrobial, and anticancer activities.

General Information


CAS Number 60511-85-5
Chemical Formula C18H12N2
Molecular Weight 256.31 g/mol
Full Name Indolo[2,3-a]carbazole
Synonyms 11,12-Dihydroindolo[2,3-a]carbazole
Classification / Family Indocarbazole derivatives, Semiconductor synthesis intermediates, Heterocyclic building blocks, Photocatalyst

Chemical Structure


Indolo[2,3-a]carbazole chemical structure, CAS 60511-85-5
Indolo[2,3-a]carbazole chemical structure, CAS 60511-85-5

Product Details


Purity >98% (1H NMR)
Melting Point Tm = 371 °C
Appearance Off-white powder/crystals

MSDS Documentation


Indolo[2,3-a]carbazoleIndolo[2,3-a]carbazole MSDS Sheet

Literature and Reviews


  1. An Indolocarbazole-Based Thermally Activated Delayed Fluorescence Host for Solution-Processed Phosphorescent Tandem Organic Light-Emitting Devices Exhibiting Extremely Small Efficiency Roll-Off, S. Ohisa et al., Adv. Funct. Mater., 29 (16), 1808022 (2019); DOI: 10.1002/adfm.201808022.
  2. Design of thermally activated delayed fluorescent sensitizers for high efficiency over 20% and long lifetime in yellow fluorescent organic light-emitting diodes, J. Kim et al., J. Mater. Chem. C, 8, 5265-5272 (2020); DOI: 10.1039/D0TC00178C.
  3. Thiadiazole Fused Indolo[2,3-a]carbazole Based Oligomers and Polymer, G. Balaji et al., Org. Lett., 11 (19), 4450–4453 (2009); DOI: 10.1021/ol901806q.
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