Bright Stretchable White Alternating‐Current Electroluminescent Devices Enabled by Photoluminescent Phosphor. Issue 8 (29th December 2021)

• Record Type: Journal Article
• Authors: Zhao, Changbin; Yang, Biao; Ali, Muhammad Umair; Zhao, Yiqian; Zhang, Chaohong; Yin, Yongming; Liu, Ming; Yan, Chaoyi; Meng, Hong
• Is Part Of: Advanced materials technologies. Volume 7:Issue 8(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-12-29
• Subjects: alternating current‐driven -- electroluminescence -- photoluminescent phosphor -- stretchable devices -- white‐emission; Materials science -- Periodicals; Technological innovations -- Periodicals; Materials science; Technological innovations; Periodicals; 620.1105
• DOI: 10.1002/admt.202101440
• Languages: English
• ISSNs: 2365-709X

Abstract

Abstract: Alternating current‐driven electroluminescent (ACEL) devices have recently emerged as a potential candidate for next‐generation smart lighting, stretchable displays, and wearable electronics. Herein, a simple and efficient method is developed to fabricate high brightness, chromatic‐stable, and stretchable white ACEL devices through doping wide‐spectrum yellow photoluminescent phosphor into blue electroluminescent emissive layer. By tuning the ratio of electroluminescent to photoluminescent phosphors in the emissive layer, the optimized device achieved a maximum brightness of 3150 cd m −2 for white emission with Commison Internationale de L'Eclairage coordinates of (0.28, 0.34), and manifested a more stable chromaticity than traditional ACEL devices. Moreover, a digital display and stretchable white ACEL device (with a tensile strain of 150%) are demonstrated to show the generality of this approach. The high brightness white ACEL devices proposed in this work offer a simplified architecture with facile fabrication process and large‐area compatibility, which may find broad range of applications in wearable optoelectronics. Abstract : High brightness, chromatic‐stable and stretchable white alternating current‐driven electroluminescent (ACEL) devices are achieved through doping wide‐spectrum yellow photoluminescent phosphor into blue electroluminescent layer. The optimized device exhibited a maximum brightness of 3150 cd m −2 for white emission with Commison Internationale de L'Eclairage coordinates of (0.28, 0.34). In addition, stretchable white ACEL devices are demonstrated that perform well under high tensile strain of up to 150%.