Prof. Vinich Promarak
Prof. Vinich Promarak
Vidyasirimedhi Institute of Science and Technology, Thailand
Title: Molecular Engineering of D-π-A Organic Dyes for Bio-Inspired Dye Sensitized Solar Cells
Dye-sensitized solar cell (DSSC), another type of bio-inspired solar cell development, has emerged as one of the most attractive photovoltaic devices because it offers the possibility of low-cost conversion of photoenergy. Ruthenium complex and porphyrin dyes are currently the most efficient dyes. These dyes, however, are costly and hard to prepare in high yields, which have led to the evolution of metal-free organic dyes. Organic dyes exhibit not only higher extinction coefficient, but simple preparation, structure modification and purification procedure with a low cost. In this talk, an improvement of the performance of the organic dyes as sensitizers for DSSC by fine tuning the dye chemical structures will be presented. A series of organic dipolar compounds with different molecular configurations of D-π-A, D-D-π-A, D(dendron)-π-A, D-π-A-π-A, D-π (D)-A, D-π-A-π(D)-A bearing porphyrin, triarylamine, carbazole and carbazole dendrons as donor moiety were designed, synthesized and investigated. The relationships between structure of these dyes and properties and cell performances will be drawn and discussed. The choice of π-linker, auxiliary acceptor and terminal acceptor are found to be crucial in designing of the dye. Some of these dyes show power conversion efficiencies surpass that of the Ru-based device measured under similar conditions, indicating a high potential candidate for a commercial use.
Vinich Promarak received his D.Phil. in Organic Chemistry in 2002 from the Dyson Perrin Laboratory, School of Chemistry, University of Oxford, UK. He began as a Lecturer of Chemistry in 2002 at Ubon Ratchathani University, Thailand and was promoted to Associate Professor in 2007. In 2013, he was appointed as Full Professor in Chemistry at Institute of Science, Suranaree University of Technology, Thailand. He then moved to School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Thailand (2015 - ). During his academic research career, he was presented many awards including Thailand’s Young Scientist Awards in 2007, the TRF Outstanding Research Award in 2015 and 2014, the National Research Council of Thailand Outstanding Research Award in 2013, Asian Core Program Lectureship Award in 2009 and 2012, TRF-CHE-Scopus Research Awards in 2013, Wiley–Chemical Society of Thailand Outstanding Publication Award in 2011 and the 2016 Outstanding National Researcher (Chemistry) by the National Research Council of Thailand. Recently, he was awarded the TRF Senior Research Scholar 2017 from the Thailand Research Fund (TRF) and CST High Impact Chemist Award 2017 from the Chemical Society of Thailand (CST). His current research interests involve “High-Tech” organic materials that can be used in optoelectronic devices i.e. organic light-emitting diode, perovskite/dye-sensitized solar cells, bulk heterojunction solar cell, sensor, optical switch, organic field-effect transistor. His research interests involve around "high-tech" organic materials that can be used in applications such as organic light-emitting diode (OLED), perovskite/dye-sensitized solar cell, bulk heterojunction solar cell, sensor, optical switch, organic field-effect transistor. To date, he has co-authored more than 115 peer-reviewed papers, and his publications have been cited over 2760 times with current H-index of 30 (Google Scholar).