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General information

  • Name: C545T
  • Full name: 10-(2-Benzothiazolyl)-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H,11H-(1)benzopyropyrano(6,7-8-I,j)quinolizin-11-one
  • CAS number: 155306-71-1
  • Chemical formula: C26H26N2O2S
  • Molecular weight: 430.56 g/mol
  • Absorption: λmax = 473 nm in THF
  • Photoluminescence: λmax = 506 nm in THF
  • HOMO/LUMO: HOMO = 5.6 eV, LUMO = 3.0 eV
  • Synonyms: Coumarin 545T
  • Classification: Organic light-emitting diodes, Electron transport layer materials (ETL), Emmiting layer materials (EML), Green fluorescent dopant materials, Organic photovoltaics (OPV), Laser dyes, TADF materials
  • Purity: Sublimed: >99%
  • Melting point: 228 °C
  • Appearance: Pale yellow to yellow powder/crystals

C545T >99% – High-Purity Green Fluorescent Dopant for Advanced OLEDs

At Noctiluca, we proudly offer C545T, a crucial material for the advancement of OLED (organic light-emitting diode) and OPV (organic photovoltaics) technology. Formally known as 10-(2-Benzothiazolyl)-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H,11H-(1)benzopyropyrano(6,7-8-I,j)quinolizin-11-one, this compound, identified by CAS number 155306-71-1 and molecular formula C26H26N2O2S, is meticulously crafted to meet the highest standards of research and industrial applications. With a superior purity of >99%, C545T ensures exceptional performance in advanced OLED and OPV applications. Our dedication to quality guarantees that C545T supports unmatched efficiency and longevity in electronic devices, making it indispensable for modern technology.

The Molecular Structure and Properties of C545T

C545T, also known as Coumarin 545T, is distinguished by its advanced photophysical properties. This pale yellow to yellow powder/crystalline compound exhibits absorption maxima at λmax = 473 nm in THF and photoluminescence at λmax = 506 nm in THF. The molecular structure includes a unique combination of benzothiazolyl and quinolizinone units, enhancing its electron transport and green fluorescent capabilities. These properties, along with its high thermal stability with a melting point of 228 °C, make C545T an excellent choice for creating efficient and reliable OLEDs, OPVs, and laser dyes.

Key Features of C545T

  • Exceptional Purity and Quality: Our C545T, with a purity level of >99%, is produced through a stringent sublimation process. This high level of purity ensures consistent and reliable material quality, which is essential for high-performance OLED and OPV applications. The exceptional purity of C545T is critical for developing effective emissive and charge transport layers.
  • Optimized for OLED and OPV Applications: C545T is highly versatile, functioning effectively as a green fluorescent dopant, emitting layer (EML) material, and TADF material. Its integration into these layers results in devices with superior energy conversion efficiency and extended operational lifespans. This versatility is vital for advancing OLED and OPV technology, making C545T a preferred choice for developers aiming to innovate in electronic and photovoltaic applications.
  • Superior Photophysical Attributes: Featuring absorption maxima at λmax = 473 nm and photoluminescence at λmax = 506 nm, C545T offers outstanding photophysical properties. These characteristics are crucial for maximizing light absorption and energy transfer in OLEDs and OPVs, aiding in the creation of highly efficient, next-generation electronic devices.
  • High Thermal Stability: C545T is designed to maintain high performance even at elevated temperatures, with a melting point of 228 °C. This impressive thermal stability ensures that C545T retains its structural integrity and electronic properties under demanding conditions, making it a reliable choice for OLED and OPV applications requiring long-term consistency.
  • Versatile Processing Capabilities: C545T’s excellent solubility and adaptability make it suitable for various fabrication processes, including solution processing methods like spin-coating and inkjet printing. This flexibility facilitates its integration into different manufacturing workflows, enabling the production of devices with enhanced efficiency and uniformity. Whether in research environments or large-scale production, C545T’s processability supports innovative design and application in OLEDs and OPVs.

The Role of C545T in Advanced OLEDs

C545T, chemically identified as C26H26N2O2S, plays a pivotal role in the development of high-performance OLED and OPV technology. By providing efficient charge transport and emission capabilities, C545T significantly enhances the light-emitting and energy conversion properties of devices. Its effectiveness as a green fluorescent dopant and TADF material ensures vibrant color purity and brightness, which are essential for developing high-definition displays and efficient solar cells. Additionally, its robust thermal stability and superior photophysical properties support the creation of durable and reliable electronic devices. The unique combination of these properties makes C545T a critical asset in advancing OLED and OPV technology and expanding its applications in modern electronics.


C545T exemplifies Noctiluca’s commitment to delivering superior chemical materials, underscoring our dedication to advancing material science for sustainable and efficient OLED and OPV applications. As a leading OLED materials supplier and contract research organization (CRO), we are devoted to providing our clients with premium-grade materials that foster technological and innovative progress.

Contact us today to discover how our high-purity C545T can meet your scientific and industrial needs, ensuring your projects achieve the highest standards of quality and performance, or to inquire about bulk orders of this compound.


Any questions? Contact us!