关于举行香港科技大学周慈勇博士学术报告的通知

报告题目：Probing charge dynamics in organic solar cells using optical spectroscopy

报 告 人：周慈勇博士（香港科技大学研究助理教授）

报告时间：2017年4月28日（周五）上午11:00

报告地点：北区发光材料与器件国重502会议室

摘要：

The power conversion efficiency of a bulk-heterojunction organic photovoltaic blend is governed by charge separation and recombination processes at short timescales. A physical model of these processes can be developed using optical spectroscopy techniques with femtosecond resolutions, such as transient pump-probe spectroscopy. In this talk, I will review the use of optical spectroscopy for understanding charge dynamics in organic photovoltaic blends, and discuss how this technique was used to reveal the important role of spin in charge recombination^1,2. This spin recombination pathway can significantly limit the solar cell efficiency, and is energetically favored for systems that are designed to have low photovoltage losses³.

1.   Chow et al., J. Am. Chem. Soc., 136, 3424-3429 (2014)

2.   Rao, Chow et al, Nature, 500, 7463, 435-439 (2013)

3.   Liu et al., Nature Energy, 1, 16089 (2016)

简历：

Philip Chi Yung CHOW (周慈勇)

Academic qualifications and previous positions held:

May – Nov 2016          Post-doctoral Fellow, University of Tokyo

2010 – 2016           Ph.D., University of Cambridge (Advisor: Prof. Richard Friend)

2009 – 2010           M.Phil., University of Cambridge

2006 – 2009           B.Sc., Imperial College London

Present position:

Dec 2016 – Present      Research Assistant Professor

The Hong Kong University of Science and Technology

Selected publications:

•   S. Chen, Y. Liu, L. Zhang, P. C. Y. Chow, G. Zhang, W. Ma, H. Yan, A wide-bandgap donor polymer for highly efficient non-fullerene organic solar cells with a small voltage loss, J. Am. Chem. Soc., (Accepted, 2017)

•   P. C. Y. Chow, S. L. Bayliss, G. Lakhwani, N. C. Greenham, and R. H. Friend, In situ optical measurement of charge transport dynamics in organic photovoltaics, Nano Letters, vol. 15, no. 2, pp. 931-935, Feb. 2015.

•   P. C. Y. Chow*, S. Albert-Seifried*, S. Gelinas, and R. H. Friend, Nanosecond intersystem crossing times in fullerene acceptors: implications for organic photovoltaic diodes, Advanced Materials, vol. 26, no. 28, pp. 4851-4854, Jul. 2014. (*Equal contribution)

•   P. C. Y. Chow, S. Gelinas, A. Rao, and R. H. Friend, Quantitative bimolecular recombination in organic photovoltaics through triplet exciton formation, J. Am. Chem. Soc., vol. 136, no. 9, pp. 3424-3429, Mar. 2014.

•   A. Rao, P. C. Y. Chow, S. Gelinas, C. W. Schlenker, C.-Z. Li, H.-L. Yip, A. K.-Y. Jen, D. S. Ginger, and R. H. Friend, The role of spin in the kinetic control of recombination in organic photovoltaics, Nature, vol. 500, no. 7463, pp. 435-439, Aug. 2013.

Scholarships and awards:

2016       JSPS Postdoctoral Fellowship for Overseas Researchers

2010       Doctoral Training Award (UK Research Council)

2010       Graduate Research Studentship*, Trinity Hall, Cambridge

2010       Croucher Scholarship for Doctoral Study*

2009       First Class Honours, Imperial College London