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- Title
Resilient, environment tolerant and biocompatible electroluminescent devices with enhanced luminance based on compliant and self-adhesive electrodes.
- Authors
Lu, Ya; Chen, Yuanyuan; Sun, Haoyu; Deng, Fang; Mei, Changtong; Xu, Xinwu; Wu, Qinglin; Xiao, Huining; Yue, Yiying; Han, Jingquan
- Abstract
Electroluminescent (EL) devices are of great significance for expanding the application range of optoelectronics. However, the realization of EL devices with environment-tolerance, stretchability, mechanical cycling stability, self-adhesion, biocompatibility, and high dielectric constant still remains a challenge. Herein, a type of EL device with enhanced comprehensive performances composing of a chlorinated barium titanate/phosphor/polydimethylsiloxane (Cl-BT/phosphor/PDMS) luminescent layer sandwiched between two silver nanowire-cellulose nanocrystal with II crystalline allomorph/Triton X-100 modified polydimethylsiloxane (AgNW-CNC II/TX-PDMS) electrodes fabricated through a full solution-processing strategy is proposed. Environmentally-friendly CNC II with high transmittance acts as an antioxidant, dispersant and film-former for AgNWs. The hydrophilic modification of TX to PDMS imparts the electrodes with self-adhesion, high stretchability, as well as strong interfacial bonding between TX-PDMS and AgNW-CNC II. The electrodes achieve skin-like modulus by adjusting TX content, endowing the EL devices with a high compliance (186 kPa of Young's modulus). The luminescent layer with Cl-BT exhibits a high dielectric constant (19) and luminance (up to 72 cd m−2). The assembled EL device with excellent cyclic stability (luminance retention 85% after 400 cycles), durability (luminance retention >94% after 400 min) and stretchability (88% luminance at 200% strain) can work properly at broad temperatures (−20 ~ 70 °C) and underwater. This biocompatible and self-adhesive EL device demonstrates great potential for implantable biomedical devices and wearable displays under harsh environments.
- Subjects
ELECTROLUMINESCENT devices; NANOWIRES; CELLULOSE nanocrystals; ELECTROLUMINESCENCE; ELECTRODES; YOUNG'S modulus; PERMITTIVITY; BARIUM titanate
- Publication
NPJ Flexible Electronics, 2024, Vol 8, Issue 1, p1
- ISSN
2397-4621
- Publication type
Article
- DOI
10.1038/s41528-024-00322-2