Luminance enhancement of electroluminescent devices using highly dielectric UV-curable polymer and oxide nanoparticle composite

作者：Chung Seok Hwan^*; Song Seongkyu; Yang Kee Jeong; Jeong Soon Moon; Choi Byeongdae

来源：Optical Materials Express, 2014, 4(9): 1824-1832.

DOI：10.1364/OME.4.001824

A flexible hybrid structure electroluminescent (HSEL) device was fabricated from ZnS:Cu phosphor microparticles dispersed in a UV-curable polymer matrix. We observed a maximum luminance of 111 cd/m(2) at 10 kHz and 170 V from a device wherein the mixing ratio between the phosphor particles and highly dielectric polymer binder was 70:30 wt%. Furthermore, by uniformly dispersing highly dielectric BaTiO3 nanoparticles within the polymer matrix, we were able to obtain a luminance of up to 211 cd/m(2) in the HSEL device. Compared to the conventional thermal curing process, this UV process greatly simplifies the fabrication steps by combining phosphors and dielectric materials at room temperature. This process also demonstrates a promising pathway toward creating flexible and printed EL devices in the future.

• 出版日期2014-9-1