Design and Engineering of Optoelectronics: from Energy Harvesting to Bio-interfacing

one important future direction for electronics is to develop unconventional,lightweight,conformal,and soft optoelectronic systems with good performance.In this talk ,I will first introduce strategies to prepare organic solarcells.I will focus on recent efforts in developing ternary blend solar cells that can efficiently increase the absorpotion breadth of a conventional solar cell device,their mechanistic studies,and how to use nanomaterials such as metal nanoparticles and carbon nanotubes as universally-applicable additives to improve organic solar cell performance.In the second part of the talk ,I will discuss unprecedented optoelectronic systems built on inorganic materials that can intimately integrate with the body and offer unique capabilities in biomedical reaearch.The discussion will start with the breakthrough invention of the first soft,miniaturized,wireless implantable photometry system for fluorescence recording in freely moving animals.Importantly this technology offers comparable performances to the state-of-the-art commercial available tools for neuroscience community while completely eliminating the influence of tethers on naturalistic behaviors with minimal tissue damages .I will then introduce novel design strategies of a fully biodeger adable and biocompatible ultrathin silicon photovoltaic platform for subdermal energy harvesting ,which provides a new solution for wirelessly operating implantable electronics without the need for secondary surgical extraction