Atomically thin light-emitting device opens the possibility for ‘invisible’ displays

Science Daily  March 26, 2018
Transition-metal dichalcogenide monolayers have naturally terminated surfaces and can exhibit a near-unity photoluminescence quantum yield in the presence of suitable defect passivation. An international team of researchers (USA – UC Berkeley, Lawrence Berkeley National Laboratory, Saudi Arabia) fabricated a monolayer seven-segment display and achieved the first transparent and bright millimeter-scale light-emitting monolayer semiconductor device. Electroluminescence is obtained by applying an AC voltage between the gate and the semiconductor. The electroluminescence intensity is weakly dependent on the Schottky barrier height or polarity of the contact. According to the researchers the device is a proof-of-concept, and much research remains… read more. Open Access TECHNICAL ARTICLE