Bathocuproine, one of the most popular HBL materials used in organic electronics
Aids the improvement of PCE of polymer organic solar cells when used as a buffer layer
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 exciton diffusion process towards the Al electrode otherwise being quenched. One of the most commonly used buffer layer between acceptor and cathode layers is bathocuproine. The introduction of the buffer layer can greatly improve the PCE of polymer organic solar cells. BCP is one of the most popular hole-blocking layer materials that is used in organic electronics, including perovskite solar cells.
Bathocuproine (BCP) from Ossila was used in the high-impact paper (IF 30.85), Engineering Band-Type Alignment in CsPbBr3 Perovskite-Based Artificial Multiple Quantum Wells, K. Lee et al., Adv. Mater., 33 (17), 2005166 (2021); DOI: 10.1002/adma.202005166.
It was 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 .
|Molecular weight||360.45 g/mol|
|HOMO / LUMO||HOMO ~ 6.4 eV LUMO ~2.9 eV|
|Classification / Family||Electron-transport layer (ETL), Electron-injection layer (EIL), Hole-blocking layer, OFET, OLED, Organic Photovoltaics, Perovskite solar cells, Sublimed materials.|
|Melting point||280-282°C (lit.)|
|Appearance||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.
|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) |
|EQE@500 cd/m2||8.2 %|
|Current Efficiency (@500 cd/m2)||12.7 lm W−1|
|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) |
|Max. Luminance||13,600 cd/m2|
|Max. Current Efficiency||12.3 cd/A|
|Max. Power Efficiency||4.4 lm W−1|
|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) |
|Max. Luminance||12,930 cd/m2 (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) |
|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) |
|Max. Powder Efficiency||(45±2) lm W−1|
*For chemical structure information please refer to the cited references.
|Grade (Purity)||Order Code||Quantity||Price|
|Sublimed (>99.5%)||B231||1 g
|Sublimed (>99.5%)||B231||5 g||£850|
|Unsublimed (>98.0%)||B232||5 g||
Literature and Reviews
- 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)
- On the Role of Bathocuproine in Organic Photovoltaic Cells, H. Gommans et al., Adv. Funct. Mater., 18, 3686-3691 (2008)
- A Blue Organic Light Emitting Diode, Y. Kijima et al., J. Appl. Phys., 38, 5274-5277 (1999)
- On the function of a bathocuproine buffer layer in organic photovoltaic cells, M. Vogel et al., Appl. Phys. Lett., 89, 163501 (2006).
- 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.
- High efficiency white organic light-emitting devices by effectively controlling exciton recombination region, F. Guo et al., Semicond. Sci. Technol. 20, 310–313 (2005).
- 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.
- 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.
- 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.
- Matching Charge Extraction Contact for Wide-Bandgap Perovskite Solar Cells, Y. Lin et al., adv. Mater., 1700607 (2017); DOI: 10.1002/adma.201700607.
- Role of bathocuproine as hole-blocking and electron-transporting layer in organic light emitting devices, R.Tomova et al., Phys. Status Solidi. C, 7, 3–4, 992–995 (2010); DOI: 10.1002/pssc.200982725.
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