Conjugated organic polymer(COP)-based electrochromic devices(ECDs)exhibit promising applications in digital and color displays.However,fabricating COP-based ECDs integrated with excellent electrochromic performance,cu...Conjugated organic polymer(COP)-based electrochromic devices(ECDs)exhibit promising applications in digital and color displays.However,fabricating COP-based ECDs integrated with excellent electrochromic performance,customized patterns,and flexibility remains challenging.In this study,we report inkjet-printed,flexible,and patterned ECDs based on two-dimensional(2 D)polyaniline(PANI)sheets,which are evenly dispersed in formic acid(FA)enabling high-precision,stable inkjet printing.The pristine lamellar structure of PANI sheets,which combine nanoscale thickness and an appropriate doping ratio,and the additive-free ink composition endow the printed PANI electrodes and ECDs with high performance.The fabricated PANI electrode exhibits a high optical contrast(76%at a wavelength of 750 nm),a good coloration efficiency(CE)of 259.1 cm^(2) C^(-1),and a short coloration/bleaching time(1.8/2.4 s),simultaneously integrated with pseudocapacitance and mechanical flexibility.Moreover,the 2 D lamellar PANI ink developed in this study can be printed into various designed patterns,particularly for electrochemically controlled,addressable electrochromic displays.This work highlights 2 D lamellar PANI as a promising electrochromic material for flexible and patterned ECDs.展开更多
基金supported by the International Cooperation Fund of the Science and Technology Commission of Shanghai(19520744500)the National Natural Science Foundation of China(51903045 and 52173031)+3 种基金the Program of Shanghai Academic/Technology Research Leader(20XD1400100)the Basic Research Project of the Science and Technology Commission of Shanghai(21JC1400100)the Fundamental Research Funds for the Central UniversitiesGraduate Student Innovation Fund of Donghua University(CUSF-DH-D-2020048)。
文摘Conjugated organic polymer(COP)-based electrochromic devices(ECDs)exhibit promising applications in digital and color displays.However,fabricating COP-based ECDs integrated with excellent electrochromic performance,customized patterns,and flexibility remains challenging.In this study,we report inkjet-printed,flexible,and patterned ECDs based on two-dimensional(2 D)polyaniline(PANI)sheets,which are evenly dispersed in formic acid(FA)enabling high-precision,stable inkjet printing.The pristine lamellar structure of PANI sheets,which combine nanoscale thickness and an appropriate doping ratio,and the additive-free ink composition endow the printed PANI electrodes and ECDs with high performance.The fabricated PANI electrode exhibits a high optical contrast(76%at a wavelength of 750 nm),a good coloration efficiency(CE)of 259.1 cm^(2) C^(-1),and a short coloration/bleaching time(1.8/2.4 s),simultaneously integrated with pseudocapacitance and mechanical flexibility.Moreover,the 2 D lamellar PANI ink developed in this study can be printed into various designed patterns,particularly for electrochemically controlled,addressable electrochromic displays.This work highlights 2 D lamellar PANI as a promising electrochromic material for flexible and patterned ECDs.
