B You

C Miclea

C Munasinghe

CW Tang

F Wang

G Destriu

H Hwang

H Kim

I Cho

J Ibanez

K Adrian

L Hu

LE Tannas

LL Beranek

MR Bai

P Zalm

PK Panda

QM Zhang

S Shionoya

SJ Lee

SP Beeby

T Chen

T Hase

T Minami

T Yanagisawa

WM Yen

XY Wei

Y Zhang

YAE Ono

YY Chen

ZQ Zhuang

Scientific Reports

AbstractWe 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.</jats:p

Sunghoon Lee

Taewook Kang

Wunho Lee

Mohammad M. Afandi

Jongho Ryu

Jongsu Kim

Crossref

Multifunctional Device based on phosphor-piezoelectric PZT: lighting, speaking, and mechanical energy harvesting

Multifunctional Device based on phosphor-piezoelectric PZT: lighting, speaking, and mechanical energy harvesting

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