UV-curable polymer-treated polydimethylsiloxane substrate for ultrahigh-efficient flexible organic light-emitting diodes

聚二甲基硅氧烷 材料科学 基质(水族馆) 有机发光二极管 光电子学 二极管 聚合物 发光二极管 复合材料 海洋学 地质学 图层(电子)
作者
Lihui Liu,Zhongjin Zhang,Zijie Hou,Chenxi Liu,Mengze Li,Yuzhou Pan,Jian Chen,Kun Cao,Shufen Chen
出处
期刊:Applied Materials Today [Elsevier BV]
卷期号:41: 102507-102507 被引量:1
标识
DOI:10.1016/j.apmt.2024.102507
摘要

• The thermal stability of PDMS substrate is improved by using NOA63 modification layer. • The interfacial adhesion between PDMS and PEDOT:PSS is enhanced with NOA63. • The NOA63 modification layer also facilitates the light extraction in flexible OLEDs. • The flexible OLEDs achieve an ultrahigh EQE of 65 %. Flexible organic light-emitting diodes (FOLEDs) have developed rapidly and have been successfully implemented in the technology of foldable smartphones. As one of the most promising flexible substrates, polydimethylsiloxane (PDMS) suffers from the drawbacks of low thermal stability and weak interfacial adhesion with the low-cost solution-processed poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) film electrodes. In this work, a UV-curable polymer, Norland Optical Adhesive 63 (NOA63), is proposed to enhance the thermal stability and interfacial adhesion, as well as facilitating the light extraction of PDMS substrate. The PEDOT:PSS electrode film on the NOA63 modified PDMS substrate performs a uniform and smooth surface morphology with a low roughness of 3.1 nm, a high transmittance of 94.7 % at 550 nm wavelength, a low sheet resistance of 160 Ω/sq, and superior mechanical durability even after 18,000 bending cycles. The outstanding characteristics of the PDMS/NOA63 substrate enables the fabrication of an ultrahigh-efficient FOLED with a maximum current efficiency, power efficiency and external quantum efficiency of 230.6 cd/A, 144.9 lm/W and 65 %, respectively. This study paves the way to realize high-performance FOLEDs for wearable electronics in the future.
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