The effect of transmittance and luminous efficiency with the application of cathode mesh mask in transparent organic light‐emitting devices

Transparent organic light‐emitting diodes (TOLEDs) are exciting next‐generation electronic devices that can be embedded and integrated into walls, windows, head‐up panels in commercial and domestic buildings, cars, planes, and other segments of the consumer goods sector. TOLEDs are also fundamental components for the realization of the stacked OLEDs for various industrial and research applications. Furthermore, futuristic smart wearables for clothing as well as medical purposes will also benefit remarkably from the development of TOLEDs. However, the efficiency of TOLEDs is significantly lower than that of their opaque counterparts. The achievement of high‐performance TOLEDs is directly dependent on the properties of the chosen electrode materials as well as the used light extraction techniques. In this review, the reported perspectives of TOLEDs are discussed along with their types, design, and architectures, applied TOLED materials and properties, and the application fields of these transparent devices. The performance of the electrode materials and the commonly used light extraction methods are reviewed in detail as well. The main purpose is to shed light on some of the effective TOLED approaches and the underlying reasons for the frequently encountered issues in these diodes. Auspicious novel fabrication techniques as well as device structures are also highlighted.

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Transparent Organic Light‐Emitting Diodes: Advances, Prospects, and Challenges

Huseynova

Lee

Kim

et al. 2021

Advanced Optical Materials

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Highly transparent and stretchable organic light-emitting diodes with ultrathin metal films as double electrodes

Chen

Yin

Wang

et al. 2023

Applied Physics Letters

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Organic light-emitting diodes (OLEDs) with both high transparency and stretchability are of importance for next-generation wearable and deformable displays, which have not been studied in depth. In this work, highly flexible and transparent OLEDs (TrOLEDs) are achieved by using ultrathin metal films as both anode and cathode to fabricate stretchable TrOLEDs (S-TrOLEDs) based on a wrinkling strategy. The TrOLEDs show a transmittance value of 73% at 550 nm and a negligible micro-cavity effect with near Lambertian emission characteristics at a wide angle of view. Furthermore, almost symmetric electroluminescent properties are obtained from the anode and cathode, which is important for dual-side display. Two-dimensional S-TrOLEDs with random wrinkles show 50% stretchability and retain 80% of their initial luminance after 200 cycles of stretching. The effect of random wrinkles on the transmittance of S-TrOLEDs is researched and the transparency losses of the device are analyzed deeply. We hope that this work is meaningful for promoting the development of S-TrOLEDs in the display industries.

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The effect of transmittance and luminous efficiency with the application of cathode mesh mask in transparent organic light‐emitting devices

Cited by 2 publications

References 18 publications

Transparent Organic Light‐Emitting Diodes: Advances, Prospects, and Challenges

Transparent Organic Light‐Emitting Diodes: Advances, Prospects, and Challenges

Highly transparent and stretchable organic light-emitting diodes with ultrathin metal films as double electrodes

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