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Opt Express. 2012 Jul 30;20(16):17359-66. doi: 10.1364/OE.20.017359.

Electrically tunable electroluminescence from SiN(x)-based light-emitting devices.

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State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.


Two obvious Gauss peaks are observed in SiN(x)-based light-emitting devices with silver nanoparticles deposited onto the luminous layer, both of which are blue shifted with the increase of injected current. The origin of these two peaks is discussed by means of the changes of their positions, relative intensities, and full width at half maximum. We attribute the blue-shift of both electroluminescence peaks to the improvement of carrier injection as carriers can be injected into higher energy levels along their corresponding band tails, which is also confirmed by the changes of the transport mechanism.

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