Frequency‐Dependent, Alternating Current‐Driven, Field‐Induced Polymer Electroluminescent Devices with High Power Efficiency

Chen, Yonghua; Xia, Yingdong; Smith, Gregory M.; Carroll, David

doi:10.1002/adma.201402682

Cited by 39 publications

(51 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The light intensity also increases with alternating-current frequency at a constant voltage bias, and luminance of 2,000 cd m −2 was achieved at 100 kHz. However, very poor light emission was observed at 400 kHz owing to insufficient time for carrier injection, consistent with previous results3132. It should be noted that the device was electrically broken down at the voltage of ∼60 V. The device performance was degraded at 200 kHz, compared with that at 100 kHz and the device failure occurred at ∼60 V, when it was operated both 300 and 400 kHz (Supplementary Fig.…”

Section: Resultssupporting

confidence: 90%

“…To this end, we envisioned that a field-driven organic light-emitting platform would be useful for dynamic interactive display applications. One or two insulating layers can be inserted between the electrode and light-emitting layer, to facilitate carrier injection on alternating-current field2324252627282930313233343536. In addition, this unique architecture with insulating layers does not permit the direct contact between the electrodes and light-emitting layers and thus band alignment design of the two layers may not be necessarily considered.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Organic light emitting board for dynamic interactive display

et al. 2017

View full text Add to dashboard Cite

Interactive displays involve the interfacing of a stimuli-responsive sensor with a visual human-readable response. Here, we describe a polymeric electroluminescence-based stimuli-responsive display method that simultaneously detects external stimuli and visualizes the stimulant object. This organic light-emitting board is capable of both sensing and direct visualization of a variety of conductive information. Simultaneous sensing and visualization of the conductive substance is achieved when the conductive object is coupled with the light emissive material layer on application of alternating current. A variety of conductive materials can be detected regardless of their work functions, and thus information written by a conductive pen is clearly visualized, as is a human fingerprint with natural conductivity. Furthermore, we demonstrate that integration of the organic light-emitting board with a fluidic channel readily allows for dynamic monitoring of metallic liquid flow through the channel, which may be suitable for biological detection and imaging applications.

show abstract

Section: Resultssupporting

confidence: 90%

mentioning

confidence: 99%

Organic light emitting board for dynamic interactive display

et al. 2017

View full text Add to dashboard Cite

show abstract

“…This phenomenon was also observed in purely capacitive electroluminescent devices with organic semiconductor active materials. 64,[71][72][73] The spatial position of the carrier recombination (light emission) zone of the AC-driven PeLEFET can be controlled by modifying the gate or source drain voltages of the device, similarly to its DC-driven counterpart. This can be achieved in both cases of AC-driven drain or gate electrodes.…”

Section: Resultsmentioning

confidence: 99%

AC-driven perovskite light-emitting field-effect transistors

Maddalena

Chin

Cortecchia

et al. 2017

2017 Conference on Lasers and Electro-Optics Europe &Amp; European Quantum Electronics Conference (CLEO/Europe-EQEC)

View full text Add to dashboard Cite

† Electronic supplementary information (ESI) available.Perovskite light-emitting field-effect transistors (PeLEFETs) provide a versatile device architecture to control transport and electroluminescence properties of hybrid perovskites, enabling injection of high charge carrier density and spatial control of the radiative recombination zone. Ionic screening and organic cation polarization effects typical of metal-halide perovskites, however, critically affect PeLEFET efficiency and reliability. In this work, we demonstrate a new device operation mode based on high-frequency modulation of the applied voltages, which allows significant reduction of ionic drift/screening in methylammonium lead iodide light-emitting transistors. In optimized top contact PeLEFETs, AC operation results in brighter and more uniform electroluminescence compared to DC-driven devices. Moreover, high frequency modulation enables electroluminescence emission up to room temperature.

show abstract

“…Existing challenges in the ACEL devices are their high operating voltage and low efficiency, which might impede their applications in wearable and portable electronics. Fortunately, studies are being carried out with promising improvements of reduced operating voltages (< 50 V) and increased efficiency in the organic ACEL devices [46,47]. Different approaches have also been conducted to effectively reduce the operating voltage in the inorganic ACEL devices.…”

Section: Alternating Current Electroluminescence (Acel)mentioning

confidence: 99%

Progress and Prospects in Stretchable Electroluminescent Devices

Wang

Lee

2017

Nanophotonics

View full text Add to dashboard Cite

Stretchable electroluminescent (EL) devices are a new form of mechanically deformable electronics that are gaining increasing interests and believed to be one of the essential technologies for next generation lighting and display applications. Apart from the simple bending capability in flexible EL devices, the stretchable EL devices are required to withstand larger mechanical deformations and accommodate stretching strain beyond 10%. The excellent mechanical conformability in these devices enables their applications in rigorous mechanical conditions such as flexing, twisting, stretching, and folding.The stretchable EL devices can be conformably wrapped onto arbitrary curvilinear surface and respond seamlessly to the external or internal forces, leading to unprecedented applications that cannot be addressed with conventional technologies. For example, they are in demand for wide applications in biomedical-related devices or sensors and soft interactive display systems, including activating devices for photosensitive drug, imaging apparatus for internal tissues, electronic skins, interactive input and output devices, robotics, and volumetric displays. With increasingly stringent demand on the mechanical requirements, the fabrication of stretchable EL device is encountering many challenges that are difficult to resolve. In this review, recent progresses in the stretchable EL devices are covered with a focus on the approaches that are adopted to tackle materials and process challenges in stretchable EL devices and delineate the strategies in stretchable electronics. We first introduce the emission mechanisms that have been successfully demonstrated on stretchable EL devices. Limitations and advantages of the different mechanisms for stretchable EL devices are also discussed. Representative reports are reviewed based on different structural and material strategies. Unprecedented applications that have been enabled by the stretchable EL devices are reviewed. Finally, we summarize with our perspectives on the approaches for the stretchable EL devices and our proposals on the future development in these devices.

show abstract

Frequency‐Dependent, Alternating Current‐Driven, Field‐Induced Polymer Electroluminescent Devices with High Power Efficiency

Cited by 39 publications

References 41 publications

Organic light emitting board for dynamic interactive display

Organic light emitting board for dynamic interactive display

AC-driven perovskite light-emitting field-effect transistors

Progress and Prospects in Stretchable Electroluminescent Devices

Contact Info

Product

Resources

About