title: Polysiloxane Functionalized Carbon Dots and Their Cross-Linked Flexible Silicone Rubbers for Color Conversion and Encapsulation of White LEDs.
abstract: In this work, aminopropylmethylpolysiloxane (AMS) functionalized luminescent carbon dots (AMS-CDs) were prepared via a one-step solvothermal method. AMS-CDs could be self- or co-cross-linking with AMS to form 3D flexible transparent silicone rubbers (SRs) where CDs acted as cross-linking points, so the loading fraction of AMS-CDs could be adjusted from 10 to 100 wt %, thus modulating fluorescence properties and flexibility of silicone rubbers. Because of the self-curing property and high thermal stability, AMS-CDs were also studied in white LEDs (WLEDs), serving as a color conversion and encapsulation layer of GaN based blue LEDs simultaneously that would avoid the traditional problem of poor compatibility between emitting and packaging materials. And the color coordinate of AMS-CDs based WLEDs (0.33, 0.28) was very close to the pure white light. In addition, the obtained CDs cross-linked SRs had good transparency (T > 80%) at 510-1400 nm and high refractive indexes (1.33-1.54) that could meet the need of commercial packaging materials and optical application. AMS-CDs were also promising to be used in the UV LEDs based WLEDs according to their wide wavelength emission and flexible optoelectronic device.
authors.affiliation: School of Materials Science and Engineering, Shandong University , Jinan 250061, China.|Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190, China.
authors.forename: Yunfeng
authors.initials: Y
authors.lastname: Wang
authors.affiliation: College of Materials Science and Engineering, Qingdao University of Science and Technology , Qingdao 266042, China.
authors.forename: Zhengmao
authors.initials: Z
authors.lastname: Yin
authors.affiliation: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190, China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Xie
authors.affiliation: School of Materials Science and Engineering, Shandong University , Jinan 250061, China.
authors.forename: Xinxin
authors.initials: X
authors.lastname: Zhao
authors.affiliation: School of Materials Science and Engineering, Shandong University , Jinan 250061, China.|Key Laboratory of Special Functional Aggregated Materials, Ministry of Education , Jinan 250061, China.
authors.forename: Chuanjian
authors.initials: C
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190, China.
authors.forename: Shuyun
authors.initials: S
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190, China.
authors.forename: Ping
authors.initials: P
authors.lastname: Chen
keywords: AMS-CDs; WLEDs; flexibility; self-curing; silicone rubbers