Carbon nanotube/PEDOT:PSS electrodes for organic photovoltaics

Kymakis, Emmanuel; Klapsis, G.; Koudoumas, E.; Stratakis, Emmanuel; Kornilios, N.; Vidakis, Nectarios; Franghiadakis, Y.

doi:10.1051/epjap:2006148

Cited by 68 publications

(44 citation statements)

References 15 publications

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“…PEDOT:PSS has a low conductivity compared to ITO, which limits its applications in devices; therefore, chemical doping and thermal annealing, [91][92][93][94] as well as composites, 95 have been used to enhance the conductivity and environmental stability of solar cell devices. However, there is a tradeoff between optical transparency and electrical conductivity of a PEDOT:PSS system: higher conductivity induced by chemical doping or thermal annealing leads to decreased optical transmission, which means restricted absorption of light, resulting in a lower PCE of PEDOT:PSS-based solar cell devices.…”

Section: Stability Problems With Organic Solar Cellsmentioning

confidence: 99%

“…However, there is a tradeoff between optical transparency and electrical conductivity of a PEDOT:PSS system: higher conductivity induced by chemical doping or thermal annealing leads to decreased optical transmission, which means restricted absorption of light, resulting in a lower PCE of PEDOT:PSS-based solar cell devices. To overcome this drawback and nd a balance between conductivity and optical transparency, Kymakis et al 95 used single-walled carbon nanotubes (SWCNTs)/PEDOT:PSS as the hole collecting electrode for P3HT:PCBM-based solar cells.…”

Section: Stability Problems With Organic Solar Cellsmentioning

confidence: 99%

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Stability of graphene-based heterojunction solar cells

Singh

Nalwa

2015

RSC Adv.

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Bulk-heterojunction (BHJ) solar cells based on organic small molecules and polymers are the focus of increasing attention by science and commerce. In organic photovoltaic devices, a conjugated polymer layer is used as the donor, while a fullerene-based derivative is used as the acceptor. Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is one of the most common interfacial materials used for organic BHJ solar cells. However, PEDOT:PSS is acidic and hygroscopic in nature, and it inherits microstructural inhomogeneities that cause not only gradual degradation, but a complete failure of BHJ solar cell devices. There is a growing interest in graphene-based solar cells because graphene-based materials offer ease of solution processability, high optical transparency, and high power conversion efficiency. Graphene has been actively investigated for use as a transparent conducting electrode, and as a photoactive layer in fabricating solar cell devices. Power conversion efficiency in the range of 10% to 15% for graphene and inorganic semiconductor-based hybrid heterojunction solar cells, and 15.6% for graphene-containing perovskite solar cells has been observed.Organic materials-based solar cells degrade not only from environmental exposure, but also from photo-oxidation caused by light illumination. In addition to higher power conversion efficiency, stability in graphene-based solar cells is critically important for commercial applications. In this review article, the stability of graphene-based heterojunction solar cells under atmospheric conditions is evaluated. Current studies show that the insertion of a graphene buffer layer into solar cell heterostructures stops degradation and enhances stability in solar cell devices. Long-term environmental stability of graphenebased heterojunction solar cells for commercial applications is discussed.

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Section: Stability Problems With Organic Solar Cellsmentioning

confidence: 99%

Section: Stability Problems With Organic Solar Cellsmentioning

confidence: 99%

Stability of graphene-based heterojunction solar cells

Singh

Nalwa

2015

RSC Adv.

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“…The PEDOT:PSS interlayer effectively modified the interfacial potential barrier of the Pt/n-Ge Schottky contact resulting in an increased barrier height. PEDOT:PSS is a good p-type semiconducting polymer, and therefore it has been proposed for use as a hole injection layer or as an electrode for organic solar cells and light-emitting diodes [13,14]. However, its relatively low conductivity is still a major road block to the wide spread device applications.…”

Section: Introductionmentioning

confidence: 99%

Energy-level alignment and electrical properties of Al/p-type Si Schottky diodes with sorbitol-doped PEDOT:PSS as an organic interlayer

Janardhanam

Yun

Jyothi

et al. 2015

Journal of Alloys and Compounds

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“…[2] Therefore, alternatives for ITO in organic electronics are being pursued. These include other transparent conducting oxides, [3] conducting polymers, [4][5][6] polymercarbon nanotube composites, [7,8] and two-dimensional random network single wall carbon nanotube (SWNT) films. [9][10][11][12] SWNT films are interesting candidates for alternative electrodes because they can be processed at room temperature and in ambient conditions making the process compatible with polymeric substrates.…”

Section: Introductionmentioning

confidence: 99%

Stability of Doped Transparent Carbon Nanotube Electrodes

Jackson

Domercq

Jain

et al. 2008

Adv Funct Materials

185

180

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This paper evaluates the effectiveness of p‐doping transparent single‐walled carbon nanotube (SWNT) films via chemical treatment with HNO3 and SOCl2. Stability of the improvement in electrical conductivity after doping is investigated for different doping treatments as a function of exposure time to air and as a function of temperature. Doped films were found to have a greater than twofold increase in conductivity with sheet resistance values as low as 105 Ω sq−1 with an optical transmittance of 80% at 550 nm. However, doping enhancements demonstrated limited stability in air and under thermal loading. The application of a thin capping layer of PEDOT/PSS is shown to stabilize the improvements in conductivity, evidenced by sustained lower sheet resistance in both air and under thermal loading.

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Carbon nanotube/PEDOT:PSS electrodes for organic photovoltaics

Cited by 68 publications

References 15 publications

Stability of graphene-based heterojunction solar cells

Stability of graphene-based heterojunction solar cells

Energy-level alignment and electrical properties of Al/p-type Si Schottky diodes with sorbitol-doped PEDOT:PSS as an organic interlayer

Stability of Doped Transparent Carbon Nanotube Electrodes

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