BCP - Bathocuproine

Order Code: B232
MSDS sheet

Price

(excluding Taxes)

£48.00


Pricing

 Grade Order Code Quantity Price
Unsublimed (>99.7% purity) B232 1 g £48
Sublimed (>99.8% purity) B231 1 g
£125
Unsublimed (>99.7% purity) B232 5 g £226
Sublimed (>99.8% purity) B231 5 g £399

 

General Information

Full name 2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline
Synonyms Bathocuproine, BCP
CAS number 4733-39-5
Molecular formula C26H20N2
Molecular weight 360.45 g/mol
HOMO / LUMO HOMO ~6.4 eV      LUMO ~2.9 eV
Classification / Family

Electron transport layer materials, Electron injection layer materials, Hole blocking layer materials, OFET, OLED, Organic Photovoltaics, Perovskite solar cells, Sublimed materials.

 

Product Details

Purity

Sublimed* >99.8%

Unsublimed >99.7%

Melting point 280-282°C (lit.)
Appearance 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

chemical structure of bathocuproine, CAS number 4733-39-5
Chemical Structure of Bathocuproine (BCP); CAS No. 4733-39-5; Chemical Formula C26H20N2.

 

Applications

2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline, also known as Bathocuproine (BCP), is a wide-band-gap material and has a high electron affinity. When it is embedded into organic electronic devices, bathocuproine acts as an exciton blocking barrier which prohibits excitons diffusion process towards the Al electrode otherwise being quenched. One of the most commonly used buffer layer between acceptor and cathode layer is bathocuproine and the introduction of the buffer layer can greatly improve the PCE of polymer organic solar cells. BCP is one of the most popuplar hole blocking layer materials that is used in organic elctronics including perovskite solar cells.

It has demonstrated that a BCP buffer layer reduces nonradiative recombination of excitons at the C60 –Al interface. Its most important function is to establish an Ohmic contact between the C60 film and the Al electrode in photovoltaic devices [4].

Device structure ITO/DNTPD* (60 nm)/NPB (20 nm)/mCP (10 nm)/mCP:FIrpic (25 nm)/CBP:Ir(piq)2acac (5 nm)/BCP (5 nm)/Alq3 (20 nm)/LiF (1 nm)/Al (200 nm) [5]                    
Colour White white
EQE@500 cd/m2 8.2 %
Current Efficiency@500  cd/m2 12.7 lm W1

Device structure ITO/NPB (30 nm)/NPB: DCJTB: C545T* (10 nm)/NPB (4 nm)/DNA (8 nm)/BCP (9 nm)/Alq3 (30 nm)/LiF (1 nm)/Al (100 nm) [6]
Colour White white
Max. Luminance  13,600 cd/m2
Max. Current Efficiency 12.3 cd/A
Max. Power Efficiency 4.4 lm W1
Device structure ITO/2T-NATA (17 nm)/TPAHQZn* (25 nm)/NPBX* (15 nm)/BCP (8 nm)/ Alq3 (35 nm)/LiF (0.5 nm)/Al (120 nm) [7]
Colour White   white
Max. EQE                         17.5%
Max. Luminance 12,930 cd/m(12 V) 
Max. Current Efficiency 2.66 cd/A (10 V)

Device structure ITO/ NPB(60 nm)/Alq3:DCM(7nm)/BCP(12 nm)/ Alq3(36nm)/ MgAg(200 nm) [8]
Colour Red red
Max. Luminance 1, 000 cd/m2
Max. Current Efficiency 5.66 cd/A 

Device structure ITO/α-NPD* (50 nm)/7%-Ir(ppy)3:CBP (20 nm)/BCP (10 nm)/Alq3 (40 nm)/Mg–Ag (100 nm)/Ag (20 nm)  [9]
Colour Green green
Max EQE (12.0±0.6)%
Max. Powder Efficiency (45±2) lm W1

*For chemical structure informations please refer to the cited references.

 

Characterisation

HPLC of BCP

HPLC trace of Bathocuproine (BCP).

 

1H NMR BCP Bathocuproine in CDCl3

1H NMR spectrum of 2,9-Dimethyl-4,7-diphenyl-1,10-phenantroline, also known as Bathocuproine, BCP in CDCl3: Instrument AVIIIHD400 (see full version).

 

Literature and Reviews

    1. Detailed analysis of bathocuproine layer for organic solar cells based on copper phthalocyanine and C60, J. Huang et al., J. Appl. Phys., 105, 073105 (2009)
    2. On the Role of Bathocuproine in Organic Photovoltaic Cells, H. Gommans et al., Adv. Funct. Mater., 18, 3686-3691 (2008)
    3. A Blue Organic Light Emitting Diode, Y. Kijima et al., J. Appl. Phys., 38, 5274-5277 (1999)
    4. On the function of a bathocuproine buffer layer in organic photovoltaic cells, M. Vogel et al., Appl. Phys. Lett., 89, 163501 (2006).
    5. Improved color stability in white phosphorescent organic light-emitting diodes using charge confining structure without interlayer, S-H. Kim et al., Appl. Phys. Lett. 91, 123509 (2007); http://dx.doi.org/10.1063/1.2786853.
    6. High efficiency white organic light-emitting devices by effectively controlling exciton recombination region, F. Guo et al., Semicond. Sci. Technol. 20, 310–313 (2005).
    7. White organic light-emitting devices based on novel (E)-2-(4-(diphenylamino) styryl)quinolato zinc as a hole- transporting emitter, G. Ding et al., Semicond. Sci. Technol. 24, 025016 (2009); stacks.iop.org/SST/24/025016.
    8. High-efficiency red electroluminescence from a narrow recombination zone confined by an organic double heterostructure, Z. Xie et al., Appl. Phys. Lett., 79, 1048 (2001); doi: 10.1063/1.1390479.
    9. Efficient electrophosphorescence using a doped ambipolar conductive molecular organic thin film, C. Adachi et aL., Org. Electronics, 2(1), 37-43 (2001), doi:10.1016/S1566-1199(01)00010-6.