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 technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials for OLED devices page.


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).