Carbon nanotube network electrodes enabling efficient organic solar cells without a hole transport layer

Barnes, Teresa M.; Bergeson, Jeremy D.; Tenent, Robert C.; Larsen, B.; Teeter, Glenn; Jones, K. M.; Blackburn, Jeffrey L.; Lagemaat, Jao van de

doi:10.1063/1.3453445

Cited by 124 publications

(78 citation statements)

References 18 publications

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“…With respect to ITO-free and nonfl exible solar cells (constructed over rigid substrates like glass or quartz), it is possible to fi nd even higher values, for example, 4.13% for a cell based on a singlewall CNT fi lm. [ 46 ] All the effi ciency values found in literature must be carefully compared, as the solar cells are constructed in very different ways and several aspects must be taken into account, like thermal annealing, exposure to atmosphere, moisture, and the presence of buffer layers. Moreover, it is important to note that most ITO-free devices report the use of bulk heterojunction solar cells with P3HT:PCBM (poly(3-hexylthiophene): [6,6]-phenyl-C 61 -butyric acid methylester) since it is a well-known system and generally presents better effi ciencies values than the bilayer counterpart.…”

Section: Methodsmentioning

confidence: 99%

ITO‐Free and Flexible Organic Photovoltaic Device Based on High Transparent and Conductive Polyaniline/Carbon Nanotube Thin Films

Salvatierra

Cava

Roman

et al. 2012

Adv Funct Materials

177

155

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The synthesis and characterization of thin fi lms of polyaniline/carbon nanotubes nanocomposites is reported, as well as their utilization as transparent electrodes in ITO-free organic photovoltaic devices. These fi lms are generated by interfacial synthesis, which provides them with the unique ability to be deposited onto any substrate as transparent fi lms, thus enabling the production of fl exible solar cells using substrates like PET. Very high carbon nanotube loadings can be achieved using these fi lms without signifi cantly affecting their transparency ( ≈ 80-90% transmittance at 550 nm). Sheet resistances as low as 300 Ω / ᮀ are obtained using secondary polyaniline doping in the presence of carbon nanotubes. These fi lms present excellent mechanical stability, exhibiting no lack in performance after 100 bend cycles. Flexible and completely ITO-free organic photovoltaic devices are built using these fi lms as transparent electrodes, and high effi ciencies (up to 2.27%) are achieved.

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Section: Methodsmentioning

confidence: 99%

ITO‐Free and Flexible Organic Photovoltaic Device Based on High Transparent and Conductive Polyaniline/Carbon Nanotube Thin Films

Salvatierra

Cava

Roman

et al. 2012

Adv Funct Materials

177

155

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“…Indeed in a recent independent study the substrate cost was identifi ed as the most important factor in the manufacturing cost of OPVs. [ 18 ] Possible replacements for ITO glass include other transparent conducting oxides, [ 19 ] conducting polymers, [20][21][22] carbon nanotube fi lms, [23][24][25] graphene [ 26 ] and silver nanowires. [ 27 , 28 ] Unfortunately, very few of these electrodes have yielded devices with performance comparable to those utilizing ITO glass.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Transparent Au Electrodes for Organic Photovoltaics Fabricated Using a Mixed Mono‐Molecular Nucleation Layer

Stec

Williams

Jones

et al. 2011

Adv Funct Materials

108

100

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A rapid, solvent free method for the fabrication of highly transparent ultrathin (∼8 nm) Au films on glass has been developed. This is achieved by derivatizing the glass surface with a mixed monolayer of 3‐mercaptopropyl(trimethoxysilane) and 3‐aminopropyl(trimethoxysilane) via co‐deposition from the vapor phase, prior to Au deposition by thermal evaporation. The mixed monolayer modifies the growth kinetics, producing highly conductive films (∼11 Ω per square) with a remarkably low root‐mean‐square roughness (∼0.4 nm) that are exceptionally robust towards UV/O3 treatment and ultrasonic agitation in a range of common solvents. As such, they are potentially widely applicable for a variety of large area applications, particularly where stable, chemically well‐defined, ultrasmooth substrate electrodes are required, such as in organic optoelectronics and the emerging fields of nanoelectronics and nanophotonics. By integrating microsphere lithography into the fabrication process, we also demonstrate a means of tuning the transparency by incorporating a random array of circular apertures into the film. The application of these nanostructured Au electrodes is demonstrated in efficient organic photovoltaic devices where it offers a compelling alternative to indium tin oxide coated glass.

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“…An improved solar cell performance has been reported in Ref. [98] with CNT electrode by optimizing the thickness of P3HT/PCBM layer to about 900 nm. The device structures were identical except that one cell was fabricated on 56 Ω×sq -1 ITO whereas the other one was on 60 Ω×sq -1 SWNT film.…”

Section: Current-voltage Dependence For Identical P3ht/pcbm Devices Cmentioning

confidence: 99%

Carbon nanotubes for organic/inorganic hybrid solar cells

Arici

Karazhanov

2016

Materials Science in Semiconductor Processing

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Carbon nanotube network electrodes enabling efficient organic solar cells without a hole transport layer

Cited by 124 publications

References 18 publications

ITO‐Free and Flexible Organic Photovoltaic Device Based on High Transparent and Conductive Polyaniline/Carbon Nanotube Thin Films

ITO‐Free and Flexible Organic Photovoltaic Device Based on High Transparent and Conductive Polyaniline/Carbon Nanotube Thin Films

Ultrathin Transparent Au Electrodes for Organic Photovoltaics Fabricated Using a Mixed Mono‐Molecular Nucleation Layer

Carbon nanotubes for organic/inorganic hybrid solar cells

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