消息來源:原分所
截止日期:2014-04-30
IAMS Lecture Announcement
中研院原分所演講公告
Title: Carbon nanotubes, graphene and polmer combinations for high efficiency solar cells
Speaker: Prof. Robin Nicholas (Dept. of Physics at University of Oxford, UK)
Time: 11:00AM, May 12 (Monday)
Place: C.T. Chang Memorial Hall (4F 張昭鼎紀念講堂 臺大校園內)
Contact: Dr. Lain-Jong Li 李連忠博士
Abstract:
The talk will describe ways in which carbon nanotubes, graphene and semiconducting polymers can be used to enhance solution processed PV cells made from both organic semiconductors and the new technology of perovskite cells, leading to the production of robust stable cells with over 15% efficiency.
Short CV:
Prof. Nicholas is one of the pioneers of Low Dimensional Semiconductor research, beginning in the late 1970’s where he contributed to many areas of work on III-V semiconductor heterostructures. In 2004 he began work on the optical properties of semiconducting carbon nanotubes and in 2007, he discovered how to use semiconducting polymers to form a new class of high purity self-assembling, one-dimensional nanostructures by wrapping the nanotubes in a polymer using simple solution processing. These nanostructures can be inserted into semiconducting polymer layers and by using a small band gap polymer wrapper, such as the polythiophene, P3HT, they form a type II heterojunction capable of producing charge separation which can be used in photovoltaic cells. The family of polymer nanohybrids that he has developed is contributing to a new generation of photovoltaic cells which are being actively studied world-wide with efficiencies already achieved of over 15%.
In 2007 he made the first spectroscopic measurements of the Dirac velocity on single flake monolayer graphene and demonstrated that graphene shows a significant electron-hole asymmetry. He has also studied the quantum Hall effect in graphene and shown that quantum Hall behavior persists up to remarkably high current densities, temperatures and low magnetic fields consistent with the formation of a new Quantum Hall phase.
Prof Nicholas has a very extensive international reputation and is currently chairman of the IUPAP semiconductor physics commission. He has been a member of the program committee for 15 international conferences, including co-chairing the program committee for the main Semiconductor conference, ICPS, in 2002. He has been chairman of the Semiconductor Physics groups for both the UK Institute of Physics and the European Physical Society.