Correlated Disorder Substrate‐Integrated Nanodisk Scatterers for Light Extraction in Organic Light Emitting Diodes

Piechulla, Peter M.; Donie, Yidenekachew J.; Wehrspohn, Ralf B.; Lemmer, Uli; Gomard, Guillaume; Sprafke, Alexander

doi:10.1002/adom.202202557

Cited by 4 publications

(2 citation statements)

References 38 publications

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“…Previously, randomly textured and periodic structures were studied for light management in photovoltaics and light-emitting diodes (LEDs), amongst others. [23][24][25] Lambertian textured surfaces appear highly effective and are utilized extensively for light trapping and out-coupling. On the other hand, in the course of evolution, natural selection has produced useful textured structures that modulate electromagnetic radiation for temperature regulation and camouflage.…”

Section: Introductionmentioning

confidence: 99%

A textured surface platform for dual-mode temperature regulation in photonic textiles

Abebe

Khousakoun

Gidik³

et al. 2023

Preprint

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Personal radiative heat regulation using photonic textiles can facilitate a decreased energy consumption in buildings by expanding the range of comfortable ambient conditions. Here, we propose a dual-mode photonic design, which modulates the emissivity using a textured membrane that changes its surface structure between flat and wrinkled. The dual nature of the design is achieved through a varying high and low surface emissivity to provide both cooling and heating functions. Theoretical calculations employing a variety of potential materials and geometries predict a substantial thermoregulation potential of the design, with a setpoint window of up to 5.5 °C, which is achieved using a Lambertian surface texture from zinc oxide at the frontal surface. Furthermore, we fabricate a proof-of-concept demonstrating thermal comfort in a setpoint temperature window of about 3 °C, with further room for improvement. This design leverages the concept of diffusing surfaces, well-known in the photovoltaics field e.g., towards a textile application.

show abstract

Section: Introductionmentioning

confidence: 99%

A textured surface platform for dual-mode temperature regulation in photonic textiles

Abebe

Khousakoun

Gidik³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Here, we propose a design based on a textured membrane that changes its surface geometry between flat and textured (wrinkled) as a function of temperature to modulate the outer surface emissivity. Previously, randomly textured and periodic structures were studied for light management in photovoltaics and light-emitting diodes (LEDs), among others. − Lambertian textured surfaces (i.e., perfectly diffusive surfaces) appear highly effective and are utilized extensively for light trapping and out-coupling. On the other hand, in the course of evolution, natural selection has produced useful textured structures that modulate electromagnetic radiation for temperature regulation and camouflage.…”

Section: Introductionmentioning

confidence: 99%

A Textured Surface Platform for Dual-Mode Temperature Regulation in Photonic Textiles

Abebe,

Khousakoun,

Gidik

et al. 2023

ACS Appl. Opt. Mater.

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Personal radiative heat regulation using photonic textiles can facilitate decreased energy consumption in buildings by expanding the range of comfortable ambient conditions. Here, we propose a dual-mode photonic design that modulates the emissivity using a textured membrane that changes its surface structure between flat and wrinkled. The dual nature of the design is achieved through varying high and low surface emissivity to provide both cooling and heating functions. Theoretical calculations employing a variety of potential materials and geometries predict a substantial thermoregulation potential of the design with a set point window of up to 5.5 °C, which is achieved using a Lambertian surface texture from zinc oxide at the frontal surface. Furthermore, we fabricate a proof-of-concept demonstrating thermal comfort in a set point temperature window of about 3 °C, with further room for improvement. This design leverages the concept of diffusing surfaces, well-known in the photovoltaics field, toward a textile application.

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Nanostructures in Organic Light‐Emitting Diodes: Principles and Recent Advances in the Light Extraction Strategy

Kang,

Byeon,

Kim

et al. 2024

Laser & Photonics Reviews

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Organic light‐emitting diodes (OLEDs) in recent years have emerged as a leading display technology and the popularity of OLEDs is attributed to their numerous advantages, including the ability to produce natural color, achieve a true black state, consume low consumption, exhibit fast response, and be compatible with flexible devices. However, limitations in the performance persist, e.g., the out‐coupling efficiency, which currently stands at ≈20% due to issues such as trapped modes and plasmon loss. Many researchers, therefore, have actively proposed the integration of various nanostructures to address the challenges and enhance OLED performance. The structures play a crucial role in facilitating strong optical interaction with surface plasmon and waveguide modes, thereby improving the extraction of trapped modes. To mitigate the confinement, layers to modulate the refractive index are introduced to extract the confined light and redirect it into the out‐coupled mode. In this review, a comprehensive overview of the principle and effectiveness of these nanostructures in enhancing OLED performance is provided. Various applications of OLEDs are explored based on nanostructures such as nanoparticles, nanomeshes, metasurface, bioinspired structures, and scattering layers. By implementing and refining these nanostructures, significant advancements in OLED performance are anticipated.

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Correlated Disorder Substrate‐Integrated Nanodisk Scatterers for Light Extraction in Organic Light Emitting Diodes

Cited by 4 publications

References 38 publications

A textured surface platform for dual-mode temperature regulation in photonic textiles

A textured surface platform for dual-mode temperature regulation in photonic textiles

A Textured Surface Platform for Dual-Mode Temperature Regulation in Photonic Textiles

Nanostructures in Organic Light‐Emitting Diodes: Principles and Recent Advances in the Light Extraction Strategy

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