Organic device electrode fabricated by aluminum in nanopowder and bulk form and effect on device properties

In this work, polymer diode performance was analyzed by using nickel as anode electrode from two kinds of nickel as starting materials, namely nickel wire Ni{B} and nickel nano-particle Ni{N}. Metal electrode surface roughness and grain morphology were investigated by atomic force microscope and scanning electron microscope, respectively. CurrentÀvoltage (IÀV) and capacitanceÀvoltage (CÀV) characteristics were measured for the fabricated device at room temperature. Obtained result from the currentÀvoltage characteristics shows an increment in the current density for nickel nano-particle top electrode device. The increase in the current density could be due to a reduction in built-in voltage at P3HT/Ni{N} interface.

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“…Obtained results indicate that the grain size of the electrode can be tailored by using nickel nanoparticle as source materials [7].…”

Section: (A) and 3(b)mentioning

confidence: 98%

Nickel Electrode for Improving Current Density in Organic Electronic Device

Kesavan

Ramamurthy

2015

IETE Technical Review

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“…Electrodes with no improper roughness matching will hamper the charge carrier transport across the interface of the transport layer and the metal. As a consequence, the electric field will get concentrated and funneled locally, causing undesirable leakage pathways for the charge carriers across the interface . This will alter the charge carrier dynamics of the devices and is expected to be lowered by interface engineering .…”

Section: Introductionmentioning

confidence: 99%

“…As a consequence, the electric field will get concentrated and funneled locally, causing undesirable leakage pathways for the charge carriers across the interface. 14 This will alter the charge carrier dynamics of the devices and is expected to be lowered by interface engineering. 15 Engineering of the charge extraction and transport layer of the devices is an important means to enhance device performance.…”

Section: Introductionmentioning

confidence: 99%

Electrode Transport Layer–Metal Electrode Interface Morphology Tailoring for Enhancing the Performance of Perovskite Solar Cells

Nath

Ramamurthy

Mahapatra

et al. 2022

ACS Appl. Electron. Mater.

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In the field of photovoltaics, methylammonium lead iodide (MAPbI 3 ) is the most emerging light absorber material because of its excellent optoelectronic properties. Perovskite solar cells with P−I−N device architecture were fabricated with thermally evaporated metal electrodes from different sources like silver nanoparticles and bulk silver shots. Film topography, surface morphology, structure, and grain size were observed using various characterization techniques. Top electrodes with better roughness matching with the transport layer were obtained by thermal evaporation of metal nanopowder. Various electrical characterization techniques, including current density (J) vs voltage (V) and capacitance measurements, were carried out under light and dark conditions for investigating the device performance. Devices with electrodes thermally evaporated using nanopowder showed enhancement in device performance with a lower series resistance and a higher shunt resistance, as observed from J−V characteristics. An open-circuit voltage improvement of ∼14% and a power conversion efficiency enhancement of ∼13% have been observed. A considerable improvement in contact resistances has also been noted. The idea about the recombination of devices can be obtained from J−V measurements with varying illumination intensities. The higher carrier concentration in the device based on a Ag NP electrode can be related to the contribution of the less recombination because of the reduced number of traps. These findings support the purpose of using metal nanopowder instead of the bulk form of metals for thermally evaporated top electrodes in perovskite solar cells.

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Organic Inorganic Hybrid Hole Transport Layer for Light Management in Inverted Organic Photovoltaic

Kesavan

Jagdish

Ramamurthy

2017

IEEE J. Photovoltaics

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A design to enhance the photocurrent density in an inverted bulk heterojunction organic solar cell is explored. Aluminum nanoparticles dispersed in the hole transport layer at the rear end of the device structure are observed to enhance the device performance through multiple effects including enhanced absorption and better charge collection. Modeling and simulations are used to understand the mechanisms of optical transport that underlie the enhancements which are experimentally observed.

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Organic device electrode fabricated by aluminum in nanopowder and bulk form and effect on device properties

Cited by 6 publications

References 19 publications

Nickel Electrode for Improving Current Density in Organic Electronic Device

Nickel Electrode for Improving Current Density in Organic Electronic Device

Electrode Transport Layer–Metal Electrode Interface Morphology Tailoring for Enhancing the Performance of Perovskite Solar Cells

Organic Inorganic Hybrid Hole Transport Layer for Light Management in Inverted Organic Photovoltaic

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