Abstract
We demonstrated the tri-functional device based on all powder-processing methods by using ZnS powder as phosphor layer and piezoelectric material as dielectric layer. The fabricated device generated the electroluminescent (EL) light from phosphor and the sound from piezoelectric sheet under a supply of external electric power, and additionally harvested the reverse-piezoelectric energy to be converted into EL light. Under sinusoidal applied voltage, EL luminances were exponentially increased with a maximum luminous efficiency of 1.3 lm/W at 40 V and 1,000 Hz, and sound pressure levels (SPLs) were linearly increased. The EL luminances were linearly dependent on applied frequency while the SPLs showed the parabolic increase behavior below 1,000 Hz and then the flat response. The temperature dependence on EL luminances and SPLs was demonstrated; the former was drastically increased and the latter was slightly decreased with the increase of temperature. Finally, as an energy harvesting application, the piezoelectric-induced electroluminescence effect was demonstrated by applying only mechanical pressure to the device without any external electric power.
Highlights
We demonstrated the tri-functional device based on all powder-processing methods by using ZnS powder as phosphor layer and piezoelectric material as dielectric layer
The fabricated device generated the EL light from the phosphor and the sound from the piezoelectric sheet under a supply of external electric power, and harvested the reverse-piezoelectric energy harvesting mechanical to be converted into EL light
The temperature-dependent EL luminance reached the maximum point at the Curie temperature of PZT sheet of 230 °C, while the sound pressure levels (SPLs) was slightly decrease from 73 dB (25 °C) to 65 dB (250 °C)
Summary
We demonstrated the tri-functional device based on all powder-processing methods by using ZnS powder as phosphor layer and piezoelectric material as dielectric layer. As an energy harvesting application, the piezoelectric-induced electroluminescence effect was demonstrated by applying only mechanical pressure to the device without any external electric power. To our knowledge, there is no report on tri-functional and powder-based processed devices: the light emission from the phosphor and simultaneously the sound emission from the piezoelectric as well as the piezo-electric-luminescence (PEL) by energy harvesting of external mechanical strain or vibration to be converted into light energy. The piezoelectric-induced electroluminescence effect was demonstrated by applying the external pressure to the device without any electric power
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
