瑞典林雪平大学Mats Fahlman教授5月22日上午学术报告

发布时间:2014-05-15访问量:23设置

报告人:Prof. Mats Fahlman

Division of Surface Physics and Chemistry

Department of Physics, Chemistry and Biology

Link?ping University, SE-58183, Link?ping, Sweden

 

题目 Interface phenomena in organic photovoltaics

时间:2014522(星期四)上午10:00

地点:909号楼一楼B会议室(Conference Room B, 909-1F)

 

摘要:

Organic photovoltaic (OPV) devices such as polymer:fullerene bulk heterojunction (BHJ) solar cells are considered to be a promising renewable-energy source with the potential of high throughput, low manufacturing cost, light weight and mechanical flexibility. In order to further optimize and improve the efficiencies so as to enable their successful commercialization, significant efforts are made to increase two particular photovoltaic parameters: short circuit current density (Jsc) and open circuit voltage (Voc). The energy difference between the hole-transporting level of the donor and the electron-transporting level of the acceptor heavily influences the Voc and can be seen as an upper limit to what can be achieved in the device. Strategies to increase the Voc typically have focused on synthesis of new polymers and/or new acceptor/fullerene derivatives so as to achieve optimal Donor (D) - Acceptor (A) energy level offsets [1-3]. More recently, a significant influence of photogenerated donor-acceptor charge transfer (CT) complexes on Voc has been demonstrated [4, 5], but strategies for Voc (and overall efficiency) improvement based on this effect are less explored. Here we will explore and highlight the effect of energy level alignment at the bulk heterojunctions on device efficiency using a variety of experimental techniques and interface modeling, as well as comment on strategies for enhanced power conversion [6-10]. Finally, we will briefly discuss results on a complementary technique for electrical power generation using doped conjugated polymers [11-12].

[1] C. J. Brabec et al., Adv. Funct. Mater. 11 (2001) 374.

[2] B. Yang et al., Adv. Mater. 25 (2013) 572.

[3] J. Y. Yuan et al., Adv. Funct. Mater 23 (2013) 885.

[4] M. D. Perez, C. Borek, S. R. Forrest, M. E. Thompson, J. Am. Chem. Soc. 131 (2009) 9281.

[5] K. Vandewal, K. Tvingstedt, A. Gadisa, O. Inganas, J. V. Manca, Phys. Rev. B 81 (2010) 8.

[6] Parisa Sehati, et al, IEEE Journal of Selected Topics in Quantum Electronics, 16 (2010) 1718.

[7] Harri Aarnio, et al, Adv. Energy Mater., 1 (2011) 792.

[8] Mats Fahlman, et al, J. Electron Spectrosc. Relat. Phenom, 190 (2013) 33

[9] Qinye Bao, Xianjie Liu, Slawomir Braun and Mats Fahlman, Adv. Energy Mater., DOI: 10.1002/aenm.201301272

[10] Qinye Bao, et al, submitted.

[11] Olga Bubnova, et al, Nature Materials, 10 (2011) 429.

[12] Olga Bubnova, et al, Nature Materials, 13 (2014) 190

个人简介:

l  Professor in Surface Physics and Chemistry at the Department of Physics, Chemistry and Biology (IFM), Link?ping University, 2008 – present.

l  Director of the Division of Surface Physics and Chemistry at IFM, Link?ping University, 2008 – present.

l  Node leader in SUNFLOWER (EU FP7), 2011-2015

l  Node leader in HINTS (EU FP7), 2011-2014.

l  Node leader in MOLESOL (EU FP7), 2010-2013.

l  Node leader in MINOTOR (EU FP7), 2009-2012.

l  Node leader in ONE-P (EU FP7), 2009-2011.

l  Director of the division of Physics and Electronics, Department of Science and Technology, Campus Norrk?ping, Link?ping University, 2001- 2005. 2006 (Dec.) – 2007 (July).

l  Node leader in OFSPIN (EU FP6), 2007 – 2009.

l  Deputy director of the Electronics Engineering, Physics and Mathematical programs at LiU, 2007 – 2008.

l  Director of the Master of Engineering Programs at the Norrk?ping Campus, Link?ping University, 2003-2006.

l  Node leader in LAMINATE, an EU-RTN project, 2003-2005.

l  Node leader in COE, an SSF-sponsored consortium, 2003-2008.

l  Coordinator of Education in Physics and Electronics at Campus Norrk?ping, Link?ping University, 2001-2002.

l  Coordinator of Industrial Research in the Center for Advanced Molecular Materials (CAMM: SSF-financed materials consortium including groups from KTH, Link?ping University, Lund University and Uppsala University), 2000 – 2008.

 

Awards

l  Co-winner of the EU Descartes prize awarded in 2003 for the research and development of Polymer Light-Emitting Diodes for displays.

l  G?ran Gustafsson prize in Physics in 2013.

 

Commissions of trusts

l  Chairman of the FASM (the association for Synchrotron Radiation Users at MAX-lab) board, 2004-2006.

l  Member of the Board of Directors, National Synchrotron Radiation Laboratory MAX-Lab, Lund, Sweden, 2001 – 2010

 

Career publications (Journals+proceedings+books, ISI Web of Knowledge, as of 2013-11-12):

l  135 items

l  h-index: 35

l  average citation: 32.1

l  Total citations: 4338

l  Total citations without self-citations: 4016

l  Crown index (Field normalized citations) 2007-2011: 2.46

 

 

欢迎感兴趣的老师和同学参加!

 

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