Order Code: M411
MSDS sheet


(excluding Taxes)


General Information

CAS number 58280-31-2
Chemical formula C26H16N2O2S2Zn
Molecular weight 517.94 g/mol
Absorption λmax 287,334 nm (in CH2Cl2)
Fluorescene λem 458 nm (in CH2Cl2)
HOMO/LUMO HOMO = 5.41 eV, LUMO = 2.65 eV
Synonyms Zn(BTZ)2
Classification / Family Organometallic, OLEDs, White light emitter, Electron transport layer material (ETL), Materials science.


Product Details

Purity Sublimed* 99.89%
Melting point 305-310 °C (lit.)
Color Light Yellow Powder

*Sublimation is a techinique used to obtain ultra pure grade chemicals to get rid of mainly trace metals and inorganic impurities. Sublimation happens under certain pressure for chemicals only goes through two physical stages from a solid sate to vapor (gas) and then the vapor condensed to a solid state on a cool surface (referred to as cold finger). The most typical examples of sublimation are iodine and dry ice. For more details about sublimation, please refer to sublimed materials for OLEDs and perovskites and our collection of sublimed materials.


Chemical Structure

ZN(BTZ)2 chemical structure
Chemical Structure of Bis(2-(2-hydroxyphenyl)benzothiazolate)zinc, Zn(BTZ)2; CAS No. 58280-31-2; Chemical Formula C26H16N2O2S2Zn


Bis(2-(2-hydroxyphenyl)benzothiazolate) zinc (II), Zn(BTZ)2, is one of the most studied high efficient electroluminescent material. It is also has been widely used as an excellent electron transporting materials in OLEDs [1].

Zn(BTZ)exhibits an unusual broad electroluminescent (EL) emission and for this reason, a single-emitting component for white light emitting diodes can be fabricated by using Zn(BTZ)2 as emitting layer material [2]. It has also been reported that with an insertion of rubrene layer, the purify of the white light emitting of Zn(BTZ)can be improved [3].

Device structure ITO/TPD (50 nm)/Zn(BTZ)2 (50 nm)/MgIn (200 nm) [4]
Colour Greenish White white
Max. Luminance 10,190 cd/m2
Max. Power Efficiency 0.89 lm W1

Device structure                                       ITO/2T-NATA (20 nm)/NPB (60 nm)/Zn(BTZ)2:Ir(DBQ)2(acac) (80 nm)/Alq3 (70 nm)/LiF (1nm)/Al (200 nm) [5]
Color                                  Red red
Max. Luminance 25,000 cd/m2
Max. Current Efficiency 12 cd/A

Device structure ITO/PVK:TPD (30 nm)/Zn(BTZ)2:0.05 wt.% Rubrene (50 nm)/Al (100 nm) [6]
Colour White white
Max. EQE 0.63%
Max. Luminance 4,048 cd/m2
Max. Current Efficiency 4.05 cd/A

Device structure ITO/NPB/CBP:3 wt%TBPe:1 wt%rubrene/Zn(BTZ)2:5 wt%Ir(piq)2(acac)/Zn(BTZ)2/Mg:Ag [7]
Colour White white
Max. EQE 2.4%
Max. Luminance 23,000 cd/m2


hplc trace of znbtz2

HPLC trace of Bis(2-(2-hydroxyphenyl)benzothiazolate)zinc, Zn(BTZ)2.

Literature and Reviews

  1. Structures, Electronic States, and Electroluminescent Properties of a Zinc(II) 2-(2-Hydroxyphenyl)benzothiazolate Complex, G. Yu et al., J. Am. Chem. Soc., 125 (48), 14816–14824 (2003).
  2. Charge Carrier Transporting, Photoluminescent, and Electroluminescent Properties of Zinc(II)-2-(2-hydroxyphenyl)benzothiazolate Complex, X. Xu, Chem. Mater.,19 (7), 1740–1748 (2007), DOI: 10.1021/cm062960b.
  3. Effect of inserting of thin Rubrene layer on performance of Organic Light-Emitting Diodes based on Zn(BTZ)2, R. L. Tomova et al., J. Phys.: Conf. Ser., 253, 012048 (2010), doi:10.1088/1742-6596/253/1/012048.
  4. White-Light-Emitting Material for Organic Electroluminescent Devices, Y. Hamada et al., Jpn. J. Appl. Phys. 35 L1339-L1341 (1996); http://iopscience.iop.org/1347-4065/35/10B/L1339.
  5. Effect of A Series of Host Material on Optoelectronic Performance of Red Phosphorescent OLED, H. Li et al., Chin. J. Luminance, 5, 585-589, 2009.
  6. White organic light-emitting devices using Zn(BTZ)2 doped with Rubrene as emitting layer,
    J. Zheng et al., Chin. Sci. Bull., 50, 509-513 (2005); DOI: 10.1360/04wb0050.
  7. Influence of Dopant Concentration on Electroluminescent Performance of Organic White-Light-Emitting Device with Double-Emissive-Layered Structure, M. Wu et al., Chin. Phys. Lett., 25, 294-297 (2008).
  8. White organic light-emitting diodes based on a novel Zn complex with high CRI combining emission from excitons and interface-formed electroplex, Y. Hao et al., Org. Electronics 12, 136–142 (2011).
  9. The effect of small-molecule electron transporting materials on the performance of
    polymer solar cells, H. Du et al., Thin Solid Films, 519, 4357 (2011).