Journal
IEEE TRANSACTIONS ON ELECTRON DEVICES
Volume 64, Issue 5, Pages 1922-1931Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TED.2017.2647964
Keywords
Flexible encapsulation; flexible organic light-emitting diodes (OLED); flexible transparent electrodes; wearable displays
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning (MSIP) [CAFDC 5-1(0), NRF-2007-0056090]
- Leading Foreign Research Institute Recruitment Program through the NRF - MSIP [2013K1A4A3055679]
- Civil Military Technology Cooperation Center [15-CM-EN-08]
- IT Research and Development Program of MOTIE/KEIT [10042412]
- Nano Material Technology Development Program through the NRF - MSIP [NRF-2016M3A7B4910635]
- Agency for Defense Development (ADD), Republic of Korea [15-CM-EN-08-MKE] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2016M3A7B4910635, 2013K1A4A3055679] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Organic light-emitting diodes (OLEDs) are remarkably promising display devices that can function in mechanically flexible configurations on a plastic substrate due to various compelling properties, including organic constituents, ultrathin and simple structure, and low-temperature fabrication. In spite of successful demonstrations of flexible OLEDs, some technical issues of containing relatively thick transparent electrodes made of ceramic materials and an unstable flexible encapsulation system have impeded reaching high levels of reliability and durability toward full commercialization. This review covers recent developments in structure designs for highly durable flexible OLEDs, ranging from alternative transparent electrodes to thin-film encapsulation layers, in which solution concepts for the existing critical issues of flexible OLEDs are addressed. Emerging unusual substrates and their application strategies are additionally introduced to find intimations of future display technologies and hence to disclose nonclassic flexible OLEDs.
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