【能源奈米論壇】

時間：106年11月16日(四) 12:00

地點：化學系609會議室

演講者：中研院 顏宏儒 博士

講題：Functional  Polymeric/Organic  Materials toward Optoelectronic and Energy Applications.

摘要：

Functional Polymeric/Organic Materials toward Optoelectronic and Energy Applications

This talk covers my recent work in the synthesis and structural design of functional materials. We’ve demonstrated the use of functional materials for optoelectronic and energy applications, such as lithium battery, supercapacitor, photovoltaic cell, LED, electrochromic, memory device, and fuel cells (membrane or catalysis).

The first part of my talk will focus on lithium ion batteries (LIBs). Traditional graphene anodes in LIBs suffer from significant performance loss due to the restacking of graphene layers. Therefore, we have attempted a multi-step bottom-up organic synthesis of a series of 2D and 3D nanographenes with various functional groups attached to the edge of the graphene basil planes. Among other potential application, these high-surface area nanographenes have an excellent cyclic durability over hundreds charge-discharge cycles and a much enhanced charge capacity (up to ~950 mAh/g) as novel anode materials for LIBs. Moreover, optimized electronic structure and facilitated electron transfer have led to energy storage three times the capacity of graphite (372 mAh/g), suggesting that the optimal design of conjugated nanographenes is promising for next generation LIBs with superior energy storage efficiency. Our most recent results further suggest that nanographenes and their precursors have great promises for the preparation of novel nano-onions, a new category of electrocatalyst.

In the second part, I will report systemic studies of arylamine containing electrochromic materials with red-green-blue (RGB), cyan-magenta-yellow (CMY), even black coloring (color palette) in the visible and NIR region, ranging from 300 nm to 1600 nm. Excellent operation stability has also been demonstrated over thousands coloring/bleaching switches, implying great potential for practical application in smart window and displays. Finally, I will also cover the fabrication of large grained perovskite solar cells with improved phase purity, increased crystallinity, and a much higher ambient stability.