Effects of the buffer layer inserted between the transparent conductive oxide anode and the organic electron donor

Godoy, A.; Cattin, Linda; Toumi, L.; Díaz, F. R.; Valle, M.; Soto, G.; Kouskoussa, B.; Morsli, M.; Benchouk, K.; Khelil, A.

doi:10.1016/j.solmat.2009.11.003

Cited by 55 publications

(40 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indium tin oxide (ITO) is commonly used as transparent conductive anode. In order to increase the anode work function, which is necessary for efficient hole collection, the ITO surface is subjected to specific treatments, such as oxygen plasma, or coated with a suitable anode buffer layer [16]. Metal, such as gold [17], but also transition metal oxides [18], such as tungsten oxide [19], molybdenum oxide [20] and nickel oxide…”

Section: Introductionmentioning

confidence: 99%

Effect of CuI Anode Buffer Layer on the Growth of Polymers Thin Films and on the Performances of Organic Solar Cells

Zamora¹,

Díaz²,

Valle³

et al. 2013

View full text Add to dashboard Cite

Organic photovoltaic cells using polymer belonging to the aniline-heteroaryl family as electron donor have been achieved by thermal evaporation. We show that the properties of the polymer film, morphology, molecule order and conductivity depend strongly on the bottom anode buffer layer. While cells without anode buffer layer or with MoO 3 or CuI anode buffer layer have been probed, we show that CuI allows improving strongly the cells efficiency through an improvement of the morphology and conductivity of the polymer film. This shows that although it is necessary a good band matching at the interface, this is not sufficient, because the templating effect of CuI on the polymer film is primordial for photovoltaic cells improvement.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of CuI Anode Buffer Layer on the Growth of Polymers Thin Films and on the Performances of Organic Solar Cells

Zamora¹,

Díaz²,

Valle³

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Other transition metal oxide (WO 3 , V 2 O 5 , NiO) have been probed as efficient ABL. Although such interface improvement has been often carried out [8,[23][24][25][26], the operation mechanism of these ABL is still in debate. The typical values which characterize the properties of the MoO 3 are: The work function, MoO3 , the top of the valence band, VB, which is the ionisation potential, IP, the bottom of the conduction band, BC, which is the electronic affinity (EA).…”

Section: Discussionmentioning

confidence: 99%

“…Therefore a lot of works have been dedicated at the improvement of the inte rface organic acceptor/cathode. The introduction of a thin anode buffer layer (ABL) between the ITO and the ED induces a significant improvement of the device efficiency [ 8]. For instance, we have shown that Au [ 9] and MoO x [10] allow achieving this goal, by simple vacuum deposition of an ultra -thin gold film or of a thin MoO x film when CuPc is the ED.…”

Section: Introductionmentioning

confidence: 99%

About the transparent electrode of the organic photovoltaic cells

Bérnède

Nguyen

Cattin

et al. 2011

Eur. Phys. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

Abstract. Electrodes and the nature of their contact with organic materials play a crucial role in the realization of efficient optoelectronic components. Whether the injection (organic light emittin g diodesOLEDs) or collection (organic photovoltaic cells -OPV cells) of carriers, contacts must be as efficient as possible. To do this, it is customary to refer to electrode surface treatment and / or using a buffer layer all things to optimize the contac t. Efficiency of organic photovoltaic cells based on organic electron donor/organic electron acceptor junctions can be strongly improved when the transparent conductive anode is coated with a buffer layer (ABL). We show that an ultra-thin gold (0.5 nm) or a thin molybdenum oxide (3-5 nm) can be used as efficient ABL. However, the effects of these ABL depend on the highest occupied molecular orbital (HOMO) of different electron donors of the OPV cells. The results indicate that, in the case of metal ABL, a good matching between the work function of the anode and the highest occupied molecular orbital of the donor material is the major factor limiting the hole transfer efficiency. Indeed, gold is efficient as ABL only when the HOMO of the organic donor is clos e to its work function Au . MoO 3 has a wider field of application as ABL than gold , The role of the oxide is not so clearly understand than that of Au , different models proposed to interpret the experimental results are discussed.

show abstract

“…Research over the last few years indicates that buffer layers, either inorganic such as MoO 3 , WO 3 , V 2 O 5 , ZnO, LiF or organic, like PEDOT:PSS or BCP, with thicknesses usually less than 20 nm [1][2][3][4][5][6][7] can have beneficial effects on * E-mail: ryszard@mif.pg.gda.pl interface properties. A layer of transition-element oxide (with a thickness of a few nm) incorporated on an anode increases the flux of holes injected into (or extracted from) active organic layers [1][2][3][4][6][7][8]. Additionally a layer of LiF (1 nm) or BCP (10 nm) incorporated on a cathode increases the injection of electrons [1,7].…”

Section: Introductionmentioning

confidence: 99%

Modification of current-voltage characteristics of planar organic systems by nm-thick copper phthalocyanine or perylene dye interlayer

Signerski

Jarosz

2013

Open Physics

View full text Add to dashboard Cite

Abstract:The effect of a nm-thick interlayer of copper phthalocyanine (CuPc) or perylene dye (MePTCDI) on currentvoltage characteristics of planar organic systems is discussed in this work. The MePTCDI layer in the ITO/MePTCDI/CuPc/Au system strongly reduces reverse dark current by blocking injection of holes from ITO into CuPc leading to high values of rectification ratio. The CuPc interlayer in the ITO/CuPc/MePTCDI/Ag system causes a strong reduction in electron injection from ITO and reverses a forward polarity. Modification of current-voltage characteristics of illuminated systems with an interlayer of MePTCDI or CuPc is associated with a strong photovoltaic effect. This results from efficient excition dissociation at the CuPc/MePTCDI interface. Saturation current, determined by this process of charge carrier photogeneration, can be observed at particular voltage polarity. PACS

show abstract

Effects of the buffer layer inserted between the transparent conductive oxide anode and the organic electron donor

Cited by 55 publications

References 42 publications

Effect of CuI Anode Buffer Layer on the Growth of Polymers Thin Films and on the Performances of Organic Solar Cells

Effect of CuI Anode Buffer Layer on the Growth of Polymers Thin Films and on the Performances of Organic Solar Cells

About the transparent electrode of the organic photovoltaic cells

Modification of current-voltage characteristics of planar organic systems by nm-thick copper phthalocyanine or perylene dye interlayer

Contact Info

Product

Resources

About