Performance of OLED under mechanical strain: a review
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Performance of OLED under mechanical strain: a review Nan Sun1, Chengming Jiang1,* Jinhui Song1,* 1
, Qikun Li1, Dongchen Tan1, Sheng Bi1, and
Key Laboratory for Precision and Non-Traditional Machining Technology of the Ministry of Education, Dalian University of Technology, Dalian 116024, China
Received: 31 August 2020
ABSTRACT
Accepted: 10 October 2020
OLEDs with convenient portability, low power consumption, and mechanical flexibility have successfully demonstrated their wide range of applications in display, lighting, and medical devices. With the biological requirement and continuous development of electronic technology, the OLEDs have opened up new possibilities for wearable electronic devices. Plentiful reports have revealed the progress of OLED devices with excellent performance of mechanical strain, involving flexible electrodes, processing technology, and advanced fabrication. In this review, the OLED processing methods are systematically discussed, and the development of flexible electrodes has been focused in terms of mechanical strain. In addition, the OLED performance with flexible electrodes also is described. The review provides a comprehensive understanding of OLEDs that can withstand the mechanical strain and achieve commercial maturity.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction OLED (organic light-emitting diode) has many incomparable advantages compared with traditional display technology because of its thin structure, low power consumption, high resolution, self-emissive characters, and gradually becomes a new trend of the future display. Since its invention in 1987 [1], OLED has attracted great attention from industry and academia due to its commercial application potential of low operating voltage and high brightness. In 1992, Gustafsson et al. made the first flexible OLED device, which is of pioneering significance and has triggered a new research upsurge [2]. From then on, with the
emergence and development of phosphorescent and TADF emitters, along with the rapid development of fabrication technologies, flexible OLEDs have gradually matured. In recent decades, OLED technology has been developed rapidly [3–5]. Today, with the continuous improvement of people’s health and the continuous advancement of electronic technology, flexible OLEDs that can withstand mechanical strain requirements are gradually becoming popular. Currently, flexible OLED devices have successfully demonstrated their wide range of applications in displays [6, 7], lighting [8, 9], and medical fields [10, 11]. For fully flexible OLED devices, the ability to withstand mechanical strain (mainly including
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https://doi.org/10.1007/s10854-020-04652-5
J Mater Sci: Mater Electron
bending, stretching, and repeated folding) is crucial. In addition, good light transmittance, electrical conductivity, surface adhesion and consistency, chemical stability, and low-cost mass production are also essential key
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