Dr. Nilesh Barange

Affiliation: Department of Materials Science and Engineering, North Carolina State University

Title: Nano-Patterning for Optoelectronic Devices

Abstract:

The research on nano-patterning is continually growing in the field of optoelectronic devices. The light management via nano-pattern enables one to exploit material’s theoretical limit, thereby giving access to enhance performance. Different strategies of nano-patterning for efficient organic/inorganic photovoltaic cells and light extraction in the organic/inorganic light emitting diodes have been investigated. A number of schemes that fall under the umbrella of nano-pattern are self-assembly nano-structures, nano imprint lithography, corrugation, etc. The first step is to optimize the nano-pattern for a particular device structure. This can be achieved by finite difference time domain (FDTD) simulation thus saving time and money. The fabrication method of optimized nano-pattern is unique to the material’s physical, optical and electrical properties. For example, sol-gels of organic/inorganic materials are comparatively easy for nano-patterning. Similarly, characterizing nano-patterned device need special methods. In the case of OPV an electron beam induced current (EBIC) can be a useful tool to study electrical enhancement, transient absorption spectroscopy for optical behavior. In OLED nano-patterning helps forward light extraction and measured by angle-resolved emission spectroscopy. Nano-patterning improves optical and electrical properties of organic photovoltaic (OPV) and organic light emitting diode (OLED).

Bio:

Biography: Dr. Nilesh Barange is currently working as a research associate in the Department of Material Science and Engineering, North Carolina State University (NCSU), Raleigh, NC, USA. He received his bachelors (2003), masters (2006) degree in electronics, and started working as a research engineer for the well-known research institute Visvesvaraya National Institute of Technology (VNIT), Nagpur, India. In 2011, after working in VNIT for 4 years in semiconductor fabrication, he moved to South Korea. He did his doctorate in semiconductor physics at Kyung Hee University (KHU) in collaboration with Korea Institute of Science and Technology (KIST), Seoul, South Korea (2016). He worked for KIST at a visiting scientist for six months (2016). His current expertise includes photodetectors, semiconductor fabrication, hardware interfacing, nanopatterning in optoelectronics devices, optical simulation, and electronics system design. He is also working with Nanoholdings LLC as a device physicist consultant.