[논문]Highly efficient, heat dissipating, stretchable organic light-emitting diodes based on a MoO 3 /Au/MoO 3 electrode with encapsulation

Choi, Dae Keun; Kim, Dong Hyun; Lee, Chang Min; Hafeez, Hassan; Sarker, Subrata; Yang, Jun Su; Chae, Hyung Ju; Jeong, Geon-Woo; Choi, Dong Hyun; Kim, Tae Wook; Yoo, Seunghyup; Song, Jinouk; Ma, Boo Soo; Kim, Taek-Soo; Kim, Chul Hoon; Lee, Hyun Jae; Lee, Jae Woo; Kim, Donghyun; Bae, Tae-Sung; Yu, Seung Min; Kang, Yong-Cheol; Park, Juyun; Kim, Kyoung-Ho; Sujak, Muhammad; Song, Myungkwan; Kim, Chang-Su; Ryu, Seung Yoon

doi:10.1038/s41467-021-23203-y

[해외논문] Highly efficient, heat dissipating, stretchable organic light-emitting diodes based on a MoO 3 /Au/MoO 3 electrode with encapsulation 원문보기

Nature communications, v.12 no.1, 2021년, pp.2864 -

Choi, Dae Keun (Division of Display and Semiconductor Physics, Display Convergence, College of Science and Technology, Korea University Sejong Campus, Sejong City, Republic of Korea) , Kim, Dong Hyun (Division of Display and Semiconductor Physics, Display Convergence, College of Science and Technology, Korea University Sejong Campus, Sejong City, Republic of Korea) , Lee, Chang Min (Division of Display and Semiconductor Physics, Display Convergence, College of Science and Technology, Korea University Sejong Campus, Sejong City, Republic of Korea) , Hafeez, Hassan (Division of Display and Semiconductor Physics, Display Convergence, College of Science and Technology, Korea University Sejong Campus, Sejong City, Republic of Korea) , Sarker, Subrata (Division of Display and Semiconductor Physics, Display Convergence, College of Science and Technology, Korea University Sejong Campus, Sejong City, Republic of Korea) , Yang, Jun Su (Division of Display and Semiconductor Physics, Display Convergence, College of Science and Technology, Korea University Sejong Campus, Sejong City, Republic of) , Chae, Hyung Ju , Jeong, Geon-Woo , Choi, Dong Hyun , Kim, Tae Wook , Yoo, Seunghyup , Song, Jinouk , Ma, Boo Soo , Kim, Taek-Soo , Kim, Chul Hoon , Lee, Hyun Jae , Lee, Jae Woo , Kim, Donghyun , Bae, Tae-Sung , Yu, Seung Min , Kang, Yong-Cheol , Park, Juyun , Kim, Kyoung-Ho , Sujak, Muhammad , Song, Myungkwan , Kim, Chang-Su , Ryu, Seung Yoon

Abstract ▼ AI-Helper

Stretchable organic light-emitting diodes are ubiquitous in the rapidly developing wearable display technology. However, low efficiency and poor mechanical stability inhibit their commercial applications owing to the restrictions generated by strain. Here, we demonstrate the exceptional performance of a transparent (molybdenum-trioxide/gold/molybdenum-trioxide) electrode for buckled, twistable, and geometrically stretchable organic light-emitting diodes under 2-dimensional random area strain with invariant color coordinates. The devices are fabricated on a thin optical-adhesive/elastomer with a small mechanical bending strain and water-proofed by optical-adhesive encapsulation in a sandwiched structure. The heat dissipation mechanism of the thin optical-adhesive substrate, thin elastomer-based devices or silicon dioxide nanoparticles reduces triplet-triplet annihilation, providing consistent performance at high exciton density, compared with thick elastomer and a glass substrate. The performance is enhanced by the nanoparticles in the optical-adhesive for light out-coupling and improved heat dissipation. A high current efficiency of ~82.4 cd/A and an external quantum efficiency of ~22.3% are achieved with minimum efficiency roll-off.A transparent twistable and stretchable MoO3/Au/MoO3 electrode is demonstrated by Choi et al. for organic light-emitting diodes. The device fabricated on thin elastomer shows enhanced EQE with minimum efficiency roll-off owing to the improved charge injection and heat dissipation from the substrate.

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