FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on info@ossila.com, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.


Product Code B1151-5g
Price £160 ex. VAT

Indolo[3,2-b]carbazole, used for the preparation of semiconducting molecules and polymers

High-quality and high-purity monomer available to purchase online.


Specifications | MSDS | Literature and Reviews


Found in Brassica family vegetables, indolo[3,2-b]carbazole (CAS number 6336-32-9) is a potent agonist of the aryl hydrocarbon receptor (AhR). With good thermal, chemical and environmental stability, Indolo[3,2-b]carbazole structure is highly desired in OLED and OFET devices.

Indolo[3,2-b]carbazole (ICz) has a large planar and rigid conjugated structure with fused alternating three benzene and two pyrrole rings. It can be considered as a structure of fused indole and carbazole, or two indoles fused at the opposite positions of a benzene ring.

Indolo[3,2-b]carbazole has been a useful building block for the preparation of various semiconducting small molecules and polymers. By introducing various functional groups into the 2,8,3,6-, or especially 5,11- positions of ICZ main structure, tuneable outstanding photophysical properties, great morphological stability and thermal stability can be achieved. Due to their electron donating nature, Indolo[3,2-b]carbazole derivatives have been used as hole transporting, charge injection, host and electroluminescent materials for OLED and OFET devices. 

Semiconducting Indolo[3,2-b]carbazole derivatives are relatively bearing low HOMO levels and large band gaps. Exhibiting p-type FET behaviour with hole mobilities as high as 0.2 cm2 V-1 s-1 and an on/off current ratio higher than 106, 5,11-bis(4-octylphenyl)indolo[3,2-b]carbazole allows efficient overlap between the oligomeric molecules due to its planar and rigid structure, promoting self-organized readily into highly crystalline layered structures in solid films.

General Information


CAS Number 6336-32-9
Chemical Formula C18H12N2
Full Name Indolo[3,2-b]carbazole
Molecular Weight 256.31 g/mol
Synonyms 5,11-Dihydroindolo[3,2-b]carbazole, ICz
Classification / Family Indolo-carbazoles, semiconductor synthesis intermediates, Electron donor unit, OLED, OFETs, organic photovoltaics

Chemical Structure


Indolo[3,2-b]carbazole chemical structure, CAS 6336-32-9
Indolo[3,2-b]carbazole (ICz) chemical structure, CAS 6336-32-9

Product Details


Purity >98% (1H NMR)
Melting Point 460 °C
Appearance White to yellowish green powder/crystals

MSDS Documentation


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

Literature and Reviews


  1. Synthesis, Characterization, and Application of Indolo[3,2-b]carbazole Semiconductors, P. Boudreault et al., J. Am. Chem. Soc., 129, 29, 9125–9136 (2007); DOI: 10.1021/ja071923y.
  2. Indolo[3,2-b]carbazole-Based Thin-Film Transistors with High Mobility and Stability, Y. Wu et al., J. Am. Chem. Soc., 127, 2, 614–618 (2005); DOI: 10.1021/ja0456149.
  3. Four new bipolar Indolo[3,2-b]carbazole derivatives for blue OLEDs, H. Yang et al., Dyes Pigm., 187, 109096 (2021); DOI: 10.1016/j.dyepig.2020.109096.
Return to the top