Cai Guofa,

Cai Guofa, Distinguished Professor of Henan Province,Doctoral supervisor. Now he is working in Key Laboratory for Special FunctionalMaterials of Ministry of Education, National & Local Joint Engineering Research Center forHigh-efficiency Display and Lighting Technology, School of Materials Scienceand Engineering, Henan University. His research interests mainly focuson electrochromic nanomaterials and large sizemultifunctional devices. As the first or corresponding author, theapplicant has published 28 research articles in academic journals over the pastfew years, such as Sci. Adv., Adv. Energy Mater., Acc. Chem. Res.,ACS Energy Lett., Nano Energy etc.These publications have been commented emphaticallyby Nature Materials, Chem. Rev. and other academic journals for many times, andhave attracted more than 3400 citations, of which six papers are identified asthe ESI highly cited paper. The applicant was invited to review and arbitratemanuscripts for some academic journals, such as Nature Energy, Nature Commun. etc. Moreover, the applicant haspresided over and participated in 2 national research projects each, and 5domestic and international invention patents have been authorized.

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Energy efficient electrochromic display: a promisingtrend in the future of display

Guofa Cai*

Key Laboratory forSpecial Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center forHigh-efficiency Display and Lighting Technology, School of Materials Scienceand Engineering, Henan University, Kaifeng 475004, China

As a promising energy efficient device,electrochromic display presents information via insertion and extraction of small ions when external electrical field isapplied. The electrochromic device does not consume energy to maintain thedisplay once activated, the display information exchange process can also berealized with a very little input energy. Moreover, because of the non-lightemissivecharacteristic, the electrochromic display isfriendly to human eyes. Therefore, the electrochromic display has broadapplications in energy efficient e-books, electronic shelf label and otherphotoelectric information devicesetc.Herein, we illustrate current state-of-artstrategies for the fabrication of nanostructured electrochromic materials,rational design of multifunctional smart displays, and the characterization oftheir performance. By analyzing the coupling mechanism between theelectrochromic layers and the electrolyte, we proposed a new interfaceregulation strategy to improve the compatibility of ion and electron transportrate, and developed an electrochromic material with opticalmodulation of up to 97.7%. By adjusting the interaction between the inkcomponents and the electrode, a novel technology of large-area film formationwas established with the compatible feature of the electrochromic layer and theelectrode, and a large-size (50 ´ 50 cm2) electrochromic device was firstlyconstructed. A novel system of multifunctional and flexible devices wasdemonstrated by precisely designing the matching relationship between eachfunctional layer. The application of electrochromism was extended to the fieldsof wearable intelligent optoelectronic device and other fields.