Efficient electroluminescent cooling with a light-emitting diode coupled to a photovoltaic cell (Conference Presentation)

2017 ◽  
Author(s):  
Tianyao P. Xiao ◽  
Kaifeng Chen ◽  
Parthiban Santhanam ◽  
Shanhui Fan ◽  
Eli Yablonovitch
Keyword(s):  
Light Emitting Diode ◽  
Photovoltaic Cell ◽  
Light Emitting ◽  
Electroluminescent Cooling

A Pathway for Information Transmission to the Ear

1995 ◽  
Vol 74 (9) ◽  
pp. 640-644 ◽  
Author(s):  
Ricardo Ferreira Bento ◽  
Aroldo Miniti ◽  
Tanit Ganz Sanchez ◽  
Adolfo Leiner ◽  
Carlos Augusto Nunes
Keyword(s):  
Tympanic Membrane ◽  
Hearing Aids ◽  
Electromagnetic Interference ◽  
Light Emitting Diode ◽  
Photovoltaic Cell ◽  
Small Power ◽  
Prosthetic Devices ◽  
Light Emitting ◽  
Implantable Hearing Aids ◽  
Audio Range

The use of implantable hearing aids and cochlear implants as an aid to neurosensory deafness is becoming an established procedure. The transmission of a processed speech signal is accomplished either transcutaneously via radiofrequency or percutaneously by connector coupling. Whereas the former is sensitive to electromagnetic interference, the latter increases the risk of infection. To overcome these disadvantages, an infrared (IR) system for transmission through the tympanic membrane was devised and tested. The transmitter/receiver consisted of an IR light emitting diode (LED;920nm) and a photovoltaic cell. The LED was placed inside the auditory canal of four dogs and the photovoltaic cell in the tympanic cavity over the cochlear promontory. A sinusoidal signal modulation was applied to the LED. The emitted signal was detected undistorted after crossing the tympanic membrane, with an average absorbance of 20%. High-frequency cut-off was adequate for cochlear implant purposes and audio prosthetic devices in general. The authors conclude that the tympanic membrane may be used as a translucent sealed interface to transmit data in the audio range to the middle and inner ears, with small power loss, good frequency response, and immunity to interface.

scholarly journals Design, Development, and Analysis of a Densely Packed 500x Concentrating Photovoltaic Cell Assembly on Insulated Metal Substrate

2015 ◽  
Vol 2015 ◽  
pp. 1-18 ◽  
Author(s):  
Leonardo Micheli ◽  
Nabin Sarmah ◽  
K. S. Reddy ◽  
Xichun Luo ◽  
Tapas K. Mallick
Keyword(s):  
Light Emitting Diode ◽  
Schottky Diodes ◽  
Photovoltaic Cell ◽  
Metal Substrate ◽  
The Novel ◽  
Design Development ◽  
Light Emitting ◽  
Cost Cutting ◽  
In Series ◽  
Photovoltaic Technologies

The paper presents a novel densely packed assembly for high concentrating photovoltaic applications, designed to fit 125x primary and 4x secondary reflective optics. This assembly can accommodate 144 multijunction cells and is one of the most populated modules presented so far. Based on the thermal simulation results, an aluminum-based insulated metal substrate has been used as baseplate; this technology is commonly exploited for Light Emitting Diode applications, due to its optimal thermal management. The original outline of the conductive copper layer has been developed to minimize Joule losses by reducing the number of interconnections among the cells in series. Oversized Schottky diodes have been employed for bypassing purposes. The whole design fits the IPC-2221 requirements. The plate has been manufactured using standard electronic processes and then characterized through an indoor test and the results are here presented and commented on. The assembly achieves a fill factor above 80% and an efficiency of 29.4% at 500x, less than 2% lower than that of a single cell commercial receiver. The novel design of the conductive pattern is conceived to decrease the power losses and the deployment of an insulated metal substrate represents an improvement towards the awaited cost-cutting for high concentrating photovoltaic technologies.

scholarly journals High-performance near-field electroluminescent refrigeration device consisting of a GaAs light emitting diode and a Si photovoltaic cell

2017 ◽  
Vol 122 (14) ◽  
pp. 143104 ◽  
Author(s):  
Kaifeng Chen ◽  
Tianyao P. Xiao ◽  
Parthiban Santhanam ◽  
Eli Yablonovitch ◽  
Shanhui Fan
Keyword(s):  
High Performance ◽  
Light Emitting Diode ◽  
Near Field ◽  
Photovoltaic Cell ◽  
Light Emitting

Effective Yellow Y 3 Al 5 O 12 :Ce 3+ Nanophosphor for Light‐Emitting Diode and Photovoltaic Cell as a Downconverter

2020 ◽  
Vol 217 (20) ◽  
pp. 2000178
Author(s):  
Taewook Kang ◽  
Hyunwoo Kang ◽  
Hyundon Jeong ◽  
Jehong Park ◽  
Taehoon Kim ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Photovoltaic Cell ◽  
Light Emitting

Synchronization of Chaotic Quantum Dot Light Emitting Diodes under Optical Feedback Effect

2020 ◽  
pp. 144-148
Keyword(s):  
Quantum Dot ◽  
Delay Time ◽  
Chaos Synchronization ◽  
Optical Feedback ◽  
Light Emitting Diode ◽  
Feedback Effect ◽  
Complete Synchronization ◽  
Light Emitting ◽  
Coupling Methods ◽  
Coupling Parameters

Chaos synchronization of delayed quantum dot light emitting diode has been studied theortetically which are coupled via the unidirectional and bidirectional. at synchronization of chaotic, The dynamics is identical with delayed optical feedback for those coupling methods. Depending on the coupling parameters and delay time the system exhibits complete synchronization, . Under proper conditions, the receiver quantum dot light emitting diode can be satisfactorily synchronized with the transmitter quantum dot light emitting diode due to the optical feedback effect.

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