Optoelectronic devices tagged posts

Stress and strain, applied in just the right manner, can sometimes produce amazing results. That is what researchers, led by a team at UC Berkeley’s Department of Electrical Engineering and Computer Sciences, discovered about an emerging semiconductor material—black phosphorous (BP)—used to make two types of optoelectronic devices: light emitting diodes (LEDs) and photodetectors.

Under mechanical strain, BP can be induced to emit or detect infrared (IR) light in a range of desirable wavelengths—2.3 to 5...

A microlaser comprised of a cylinder of indium gallium arsenide phosphide (red) on silicon (blue) could enable integrated optical circuits. Credit: © 2016 A*STAR Data Storage Institute

Combining silicon with a light-producing semiconductor may help develop micrometer-scale lasers, shows Doris Keh-Ting Ng and her colleagues from A*STAR Data Storage Institute. Silicon has revolutionized the manufacture of electrical devices. Electronic engineers would like to further expand the functionality of these integrated circuits by enabling them to create, manipulate and detect light. These optoelectronic devices could speed up processing of digital information, and lead to micrometer-scale lasers, for use in barcode scanners for example.

The problem, however, is that silicon is not an efficient lig...

Flexible OLED light sources on transparent electrodes developed within TREASORES. These OLEDs were made by Fraunhofer FEP using a roll-to-roll process. Credit: Fraunhofer FEP

In >3yrs of work, European scientists have finally made future lighting technology ready to market. They developed flexible lighting foils that can be produced roll-to-roll. These devices pave the path towards cheaper solar cells and LED lighting panels. Project TREASORES was lead by Empa scientist Frank Nüesch and combined knowhow from 9 companies and 6 research institutes in 5 european countries.

In Nov 2012, the TREASORES project (Transparent Electrodes for Large Area Large Scale Production of Organic Optoelectronic Devices) started with the aim of developing technologies to dramatically reduce the production cost...