文献类型：期刊文献

英文题名：Hydrochromic CsPbBr3-KBr Microcrystals for Flexible Anti-Counterfeiting and Wearable Self-Powered Biomechanical Monitoring

作者：Chen, Long[1];He, Meng[2];Li, Lianhui[3];Yuan, Shuanglong[1];Chen, Aiping[1];Chen, Mengxiao[6];Wang, Yongjiang[2,5];Sun, Litao[7];Wei, Lei[4];Zhang, Ting[3];Li, Qingwen[2];Zhang, Qichong[2]

机构：[1]East China Univ Sci & Technol, Inst Inorgan Mat, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Suzhou Inst Nanotech & Nanob, Key Lab Multifunct Nanomat & Smart Syst, Suzhou 215123, Peoples R China;[3]Chinese Acad Sci, Suzhou Inst Nanotech & Nanob SINANO, I Lab, Suzhou 215123, Peoples R China;[4]Nanyang Technol Univ, Sch Elect & Elect Engn, 50 Nanyang Ave, Singapore 639798, Singapore;[5]Gusu Lab Mat, Suzhou 215123, Peoples R China;[6]Zhejiang Univ, Coll Biomed Engn & Instrument Sci, Hangzhou 310027, Peoples R China;[7]Southeast Univ, Key Lab MEMS, Minist Educ, Nanjing 210096, Peoples R China

年份：2022

卷号：450

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20220119099);WOS:【SCI-EXPANDED(收录号:WOS:000842963700002)】；

基金：This work was supported by Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (Start-up grant E1552102) . The authors also thank Research Center of Analysis and Test of East China University of Science and Technology for the characterization of samples.

语种：英文

外文关键词：Hydrochromic; CsPbBr3-KBr microcrystals; Anti-counterfeiting; Triboelectric nanogenerators; Self-powered flexible sensors

摘要：Metal-halide perovskites (MHPs) featured with excellent photoelectronic properties and low-temperature solution processability are emerging as desired candidates for next-generation wearable and portable electronics. However, irreversible emission properties quenching of MHPs in the presence of water has severely impeded their versatile applications. Here, we present a facile water-ethanol assisted co-precipitation strategy for cost-effective and eco-friendly fabrication of hydrochromic smart luminescent CsPbBr3-KBr microcrystals (CPB-K). Interestingly, the as-prepared CPB-K can achieve reversible transition between luminescent and non-luminescent state upon the water removal/exposure owing to the dissolution/recrystallization of luminescent CsPbBr3 nanocrystals with the help of KBr salts. The coating of polydimethylsiloxane (PDMS) effectively prevents the destruction of CPB-K and maintains its green emission upon moisture. Further, by leveraging the hydrochromic CPB-K and water-resistant CPB-K/PDMS characteristic synergistically realize multiple encryption effects of information, and the hidden information can be clearly identified upon moisture decryption. Because of electrical and dielectric properties of MHPs, a flexible triboelectric nanogenerator (TENG) made from CPB-K/PDMS film as friction layer has been constructed with maximum open-circuit voltage of 43.4 V (loading CPB-K of 20 wt%), about 1.8 times that of the pristine PDMS-based TENG. Additionally, we demonstrate a self-powered wearable sensor based on CPB-K/PDMS TENG for real-time biomechanical monitoring with electrical signals. This work provides an eco-friendly fabrication approach for perovskite-based smart luminescent materials, which further opens up the possibility to expand their diverse applications in wearable electronics.