High-efficiency transparent organic light-emitting devices

Parthasarathy, Gautam; Adachi, Chihaya; Burrows, P. E.; Forrest, Stephen R.

doi:10.1063/1.126275

Cited by 160 publications

(88 citation statements)

References 13 publications

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“…[162] The Evans group developed a synthetic pathway for the preparation of iridium(III) complexes with ligands that contain terminal double bonds. [83,160,163,164] The phenylpyridine-containing chloro-bridged iridium(III) dimer [Ir(ppy) 2 -l-Cl] 2 was treated with vinylpyridine or an acac derivative with a terminal double bond. These precursor compounds allow copolymerization with suitable comonomers.…”

Section: Neutral Iridium(iii) Complexesmentioning

confidence: 99%

New Trends in the Use of Transition Metal–Ligand Complexes for Applications in Electroluminescent Devices

Langeveld²,

2005

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The advantage of using phosphorescent transition metal–ligand complexes in optoelectronic applications such as organic light‐emitting diodes (OLEDs) and light‐emitting electrochemical cells (LECs) are described and evaluated. Additionally, different device constructions utilizing phosphorescent transition‐metal complexes like iridium(III) mixed‐ligand complexes and ruthenium(II) systems are reviewed and specified. Diverse host materials in which the phosphorescent emitters can be placed are discussed, such as small organic molecules and a few polymeric systems, and alternative processing technologies are briefly compared. Recent developments in the synthesis of iridium(III) triplet emitters are discussed. Different device architectures require different kinds of metal–ligand complexes. The different synthetic routes leading to charged and non‐charged complexes are briefly discussed.

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Section: Neutral Iridium(iii) Complexesmentioning

confidence: 99%

New Trends in the Use of Transition Metal–Ligand Complexes for Applications in Electroluminescent Devices

Langeveld²,

2005

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“…In particular, when a strong electric field is applied over thin active layers, the charges form an exciplex by reducing the interfacial barrier at the heterojunction as similar to the case of the bilayer-type organic-LEDs. 19,20 These exciplex recombine eventually with a light emission, corresponding to the 1.5 eV feature.…”

mentioning

confidence: 99%

Electroluminescence in polymer-fullerene photovoltaic cells

Kim

Park

et al. 2005

Applied Physics Letters

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We report electroluminescence (EL) in photovoltaic (PV) cells based on semiconducting polymer-fullerene composites. By applying a forward bias to the PV cells, the devices exhibited a clear EL action with a peak around 1.5 eV. We ascribe this peak to an “electric field-assisted exciplex” formed between the electrons in the fullerenes and the holes in the polymers, thereby resulting in radiative recombination in the composites. This finding is totally unexpected because of a strong photoluminescence quenching in the same materials. Since the same devices also showed typical photovoltaic effects under illumination, our results demonstrate a dual functionality in one device; polymer photovoltaic cells and polymer light-emitting diodes.

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“…Next, a 8 nm thick layer of BCP was grown; BCP has been previously shown to function as an exciton blocking, electron transport layer in both organic light emitting diodes [75] and solar cells [63]. This layer was followed by a 180Å thick layer of silver shadowmasked to dene cathodes of 1.4 × 10 Reection and net absorption of the electromagnetic wave were modeled using the transfer matrix method.…”

Section: Energy Transfer Via Guided Modesmentioning

confidence: 99%

The Application of Photosynthetic Materials and Architectures to Solar Cells

Mapel

Baldo

2006

Nanostructured Materials for Solar Energy Conversion

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Photosynthetic approaches to redesigning photovoltaics (PV) oer an attractive route towards achieving high-eciency, low-cost solar energy transduction. This thesis explores two routes toward this end: the direct integration of photosynthetic structures into solid-state devices and the architectural redesign of organic solar cells to more closely parallel photosynthesis.The highly ecient photosynthetic reaction center is the site of exciton dissociation in photosynthesis, analogous to the role of the donor-acceptor interface in organic PV. This thesis describes the successful integration of reaction centers with organic semiconductors into solid-state devices. Although functional, we nd that these devices suer the same limitation as the more traditional organic PV: the ability to absorb enough light.Photosynthetic bacteria and plants compartmentalize the processes leading to light energy conversion. This spatial separation of structures augments the evolutionary design space: the processes of photon absorption and exciton dissociation occur in two separate locations, allowing the independent functional optimization of each. Applying a similar approach to PV would similarly remove the need for multifunctional materials, bypassing limiting tradeos and permitting the utilization of new material systems. To this end, I propose a novel architecture and present initial conclusions on theoretical performance eciency. Fabricated devices demonstrate the system is viable and suggests that further improvements in device design will enable highly ecient photovoltaics.

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High-efficiency transparent organic light-emitting devices

Cited by 160 publications

References 13 publications

New Trends in the Use of Transition Metal–Ligand Complexes for Applications in Electroluminescent Devices

New Trends in the Use of Transition Metal–Ligand Complexes for Applications in Electroluminescent Devices

Electroluminescence in polymer-fullerene photovoltaic cells

The Application of Photosynthetic Materials and Architectures to Solar Cells

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