Frequency-dependent, alternating current-driven, field-induced polymer electroluminescent devices with high power efficiency.

Chen, Yonghua; Xia, Yingdong; Smith, Gregory M; Carroll, David L · Adv Mater · 2014

basic_science · Level V

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Abstract

A significant enhancement in power efficiency for alternating current-driven field-induced polymer electroluminescent devices is demonstrated by employing a high-k ferroelectric polymer dielectric through impedance matching of the device with the driving source. A peak power efficiency of 34.1 lm W(-1) at a frequency of 65 kHz is achieved, which is 2 to 12 times higher than the previous highest reports.