Effect of the nature of the anode buffer layer – MoO<sub>3</sub>, CuI or MoO<sub>3</sub>/CuI – on the performances of organic solar cells based on oligothiophene thin films deposited by sublimation

Makha, Mohamed; Cattin, Linda; Djobo, S. Ouro; Stéphant, Nicolas; Langlois, Nicole I.; Angleraud, B.; Morsli, M.; Addou, M.; Bérnède, J.C.

doi:10.1051/epjap/2012120372

Cited by 10 publications

(9 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This distinct grain structure and the gaps between the grains result in a high density of grain boundaries in the thin films, respectively. Such a granular structure is often reported for CuI thin films grown with various deposition methods and is also common for CuI thin films used in optoelectronic devices, where grain boundary effects should therefore also be expected. Even epitaxial thin films grown on crystalline substrates, for example, ZnO show (well‐oriented) rotational domains such that grain boundary effects should also be present and can limit the performance of devices especially for lateral transport.…”

Section: Resultsmentioning

confidence: 99%

Suppression of Grain Boundary Scattering in Multifunctional p‐Type Transparent γ‐CuI Thin Films due to Interface Tunneling Currents

Kneiß

Yang

Barzola‐Quiquia

et al. 2018

Adv Materials Inter

View full text Add to dashboard Cite

Transparent p‐type conductive γ‐CuI thin films typically exhibit unexpectedly high hole mobilities in the range of 10 cm2 V−1 s−1 even when heavily textured. To explain this phenomenon, the transport properties of such thin films are investigated. The temperature‐dependent resistivities of the textured (111)‐oriented films with different carrier concentration are fitted using the fluctuation‐induced tunneling conductivity (FITC) model in series with a power law. The FITC model describes barriers at the grain boundaries whereas the power law considers the scattering in the metallic interior of the grains. Magnetoresistance measurements performed on a reactively DC‐sputtered thin film at low temperatures (T < 8 K) suggest a 2D weak antilocalization effect with phase coherence lengths of about 50 nm. This is corroborated by a typical logarithmic temperature dependence of the zero‐field conductance. An n‐type inversion layer or a defect band at the interfaces of the grains as origin of the 2D carrier system and the barriers at the grain boundaries is proposed. This leads to a conclusive description of the electrical transport properties of γ‐CuI thin films and explains the high hole mobilities which are due to a suppressed backscattering at the grain boundaries in the presence of tunneling channels.

show abstract

Section: Resultsmentioning

confidence: 99%

Suppression of Grain Boundary Scattering in Multifunctional p‐Type Transparent γ‐CuI Thin Films due to Interface Tunneling Currents

Kneiß

Yang

Barzola‐Quiquia

et al. 2018

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

“…By comparison with MoO 3 , we showed that the surface energy value of CuI is far lower, 59.3 mJ m −2 for the former and 26.3 mJ m −2 for the later. Such difference can justify, as in the case of CuPc, the difference in molecular orientation obtained by changing the HTL and therefore the difference in OPVC efficiency . However, in the case of AlPcCl, as is shown in Figure , the effectiveness of the template effect of CuI is dependent on the deposition rate of the layer .…”

Section: Discussionmentioning

confidence: 95%

“…The thickness and deposition rate of the MoO 3 layer were set to 3 nm and 0.02 nm s −1 , respectively . In the case of CuI, the deposition rate, which has a strong influence on cell properties, was set to 0.005 nm s −1 while its thickness was 1.5 nm . For C 60 , the deposition rate and final thickness were set to 0.05 nm s −1 and 40 nm, respectively.…”

Section: Methodsmentioning

confidence: 99%

The Influence of Deposition Rates on Properties of AlPcCl Thin Films and on the Performance of Planar Organic Solar Cells

Mohammed-Krarroubik

Morsli

Khelil

et al. 2017

Physica Status Solidi (a)

View full text Add to dashboard Cite

The performance of organic photovoltaic cells depends on different properties of the organic materials, such as carrier mobility, band structure, morphology, and crystallinity. For AlPcCl, it is shown that these properties are dependent on the layer deposition rates. As the deposition rate increases, the surface roughness of AlPcCl layers decreases. In contrast, the crystallinity of the layers increases as the deposition rate decreases, thereby increasing the hole mobility value. These effects are opposed: the former effect allows higher open circuit voltages to be obtained as the deposition rate increases, whereas the latter increases the short circuit current as the deposition rate decreases. Therefore, there is a trade‐off between open and short circuit current values, and it is necessary to find the best deposition rate for AlPcCl. Here, it is shown that the highest mobility carriers in layers deposited slowly allow the use of thicker AlPcCl layers, which permits acceptable open circuit voltage values and optimum photovoltaic cell efficiencies to be obtained. This results in an optimum efficiency value of 3.97% for a 26‐nm‐thick AlPcCl film that is deposited at 0.02–0.03 nm s−1.

show abstract

“…We derive the dielectric function, absorption coefficient and the transmission using variable angle spectroscopic ellipsometry (VASE) and in a separate experiment UV-VIS transmission of solution-cast thin-film CuI. We denote that earlier studies covered predominantly vacuum-deposited CuI films [36,37]. The response of a 34 nm solution-cast thin-film reflects an absorption feature at 400 nm (α ¼0.5 cm À 1 ).…”

Section: Resultsmentioning

confidence: 99%

CuI as versatile hole-selective contact for organic solar cell based on anthracene-containing PPE–PPV

Mohamed

Gąsiorowski

Hingerl

et al. 2015

Solar Energy Materials and Solar Cells

View full text Add to dashboard Cite

a b s t r a c tAn important issue in construction of organic photovoltaic cells concerns the selective contacts. Here, especially the modification of the hole-extraction is challenging, as energy levels have to match the polymer's highest occupied molecular orbital (HOMO). We took the view to the mutual anode interface and we sought for a solution-based alternative for commonly used PEDOT:PSS -with an eye on improving the hole-extraction with an inorganic interlayer. We present copper iodide (CuI) as a versatile inorganic p-type semiconductor that meets the requirements for enhanced charge extraction in donor polymers. We applied two types of anthracene-containing PPE-PPV block-copolymers that recently gained attention as efficient active absorbers in bulk heterojunction photovoltaic cells. We report on the advantages using CuI as hole-selective contact and show an improvement of the power conversion efficiency in polymer-based solar cells.

show abstract

Effect of the nature of the anode buffer layer – MoO₃, CuI or MoO₃/CuI – on the performances of organic solar cells based on oligothiophene thin films deposited by sublimation

Cited by 10 publications

References 16 publications

Suppression of Grain Boundary Scattering in Multifunctional p‐Type Transparent γ‐CuI Thin Films due to Interface Tunneling Currents

Suppression of Grain Boundary Scattering in Multifunctional p‐Type Transparent γ‐CuI Thin Films due to Interface Tunneling Currents

The Influence of Deposition Rates on Properties of AlPcCl Thin Films and on the Performance of Planar Organic Solar Cells

CuI as versatile hole-selective contact for organic solar cell based on anthracene-containing PPE–PPV

Contact Info

Product

Resources

About

Effect of the nature of the anode buffer layer – MoO3, CuI or MoO3/CuI – on the performances of organic solar cells based on oligothiophene thin films deposited by sublimation

Cited by 10 publications

References 16 publications

Suppression of Grain Boundary Scattering in Multifunctional p‐Type Transparent γ‐CuI Thin Films due to Interface Tunneling Currents

Suppression of Grain Boundary Scattering in Multifunctional p‐Type Transparent γ‐CuI Thin Films due to Interface Tunneling Currents

The Influence of Deposition Rates on Properties of AlPcCl Thin Films and on the Performance of Planar Organic Solar Cells

CuI as versatile hole-selective contact for organic solar cell based on anthracene-containing PPE–PPV

Contact Info

Product

Resources

About

Effect of the nature of the anode buffer layer – MoO₃, CuI or MoO₃/CuI – on the performances of organic solar cells based on oligothiophene thin films deposited by sublimation