Multi-color microfluidic organic light-emitting diodes based on on-demand emitting layers of pyrene-based liquid organic semiconductors with fluorescent guest dopants
Multi-color microfluidic organic light-emitting diodes based on on-demand emitting layers of pyrene-based liquid organic semiconductors with fluorescent guest dopants
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DOI：
10.1016/j.snb.2014.09.101
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发表时间：
2015-02-01
影响因子：
8.4
通讯作者：
Mizuno, Jun
中科院分区：
文献类型：
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作者：
Kasahara, Takashi;Matsunami, Shigeyuki;Mizuno, Jun
在这项研究中，我们提出了按需多色微流控有机发光二极管（微流控OLED）使用荧光客体发射体掺杂的液体有机半导体。我们使用1-芘丁酸2-乙基己酯（PLQ）不仅作为蓝绿色液体发射体，而且作为液体基质。将5，12-二苯基并四苯（DPT）、5，6，11，12-四苯基并四苯（rubrene）和四苯基二苯并二氢萘（DBP）掺杂到PLQ中，分别得到绿色、黄色和红色液体发光体。单微米厚SU-8为基础的微通道夹在氧化铟锡（ITO）阳极和3-氨丙基三乙氧基硅烷（APTES）改性的ITO阴极之间的玻璃基板上使用光刻和异质键合技术，和发射层的形成按需通过简单地注入液体发射到目标微通道。具有液体发射体的微流体OLED成功地表现出多色电致发光（EL）发射。此外，对于具有PLQ的2.5 μ m厚的微流体OLED，在61 V下的最大亮度达到26.0 cd/m（2），并且通过用新的液体发射体替换劣化的发射层来恢复降低的EL亮度。我们期望所提出的微流体OLED的按需多色EL发射和可刷新亮度特征将是未来长寿命发光器件应用的非常有前途的技术。(C)2014爱思唯尔有限公司版权所有。
In this study, we propose on-demand multi-color microfluidic organic light-emitting diodes (microfluidic OLEDs) using fluorescent guest emitter-doped liquid organic semiconductors. We use 1-pyrenebutyric acid 2-ethylhexyl ester (PLQ) not only for a greenish-blue liquid emitter, but also for a liquid host. 5,12-Diphenyltetracene (DPT), 5,6,11,12-tetraphenyltetracene (rubrene), and tetraphenyldibenzoperiflanthene (DBP) are doped into PLQ to obtain green, yellow, and red liquid emitters, respectively. Single-micrometer-thick SU-8-based microchannels sandwiched between an indium tin oxide (ITO) anode and a 3-aminopropyltriethoxysilane (APTES)-modified ITO cathode are fabricated on a glass substrate using photolithography and heterogeneous bonding techniques, and emitting layers are formed on-demand by simply injecting liquid emitters into the target microchannels. The microfluidic OLEDs with liquid emitters successfully exhibited multi-color electroluminescence (EL) emissions. Furthermore, the maximum luminance reached 26.0 cd/m(2) at 61 V for 2.5-mu m-thick microfluidic OLED with PLQ, and the decreased EL luminance was recovered by replacing the degraded emitting layer with a fresh liquid emitter. We expect that on-demand multi-color EL emissions and refreshable luminance features of the proposed microfluidic OLEDs will be highly promising technologies for future long-life light-emitting device applications. (C) 2014 Elsevier B.V. All rights reserved.