세미나안내

[2014 01 08] 특별세미나 (BK21PLUS)

From Nanostructure to High Efficiency in Organic Photovoltaics

MSE Graduate Students and Researchers

관리자 | 2014.01.07 09:17 | 조회 3108


Reception: MSE Graduate Students and Researchers

Reference: MSE Professors

Subject: MSE Special Seminar_Prof. Stephen R. Forrest

 

Date: 2014. 1. 8 (WED), 11:00 ~

Place: RIST Building 3, Room #3326.

■ Title: From Nanostructure to High Efficiency in Organic Photovoltaics

■ Speaker: Prof. Stephen R. Forrest

    (Departments of Physics and Electrical Engineering and Computer Science, University of Michigan)

■ Host of a Seminar: Prof. Tae-Woo Lee and Kilwon Cho

 

■ Abstract:

It has recently been shown that the fundamental physical origins of the photogeneration process can be simply understood in the context of the kinetics of polaron-pair dissociation and recombination at donor-acceptor heterojunctions1, 2.  This analysis has given rise to the derivation of an ideal diode equation that simply describes the dark current and photoresponse characteristics of organic photovoltaics. In the context of this framework, we discuss methods of controlling the nanostructure of organic thin films that follow the design principles inferred from the ideal diode theory.  Nanostructure control demands that the properties of the donor-acceptor interface and that of the bulk thin films be independently optimized, whereby there needs to be disorder at the interface to reduce the polaron-pair dissociation rate and order in the film bulk to reduce series resistance3.  We show that this morphological control using both solution and vapor phase deposition technologies can create nanostructures with solar conversion efficiencies of over 8% based on squaraine donors and electron conducting buffer layers. Indeed, using a combination vapor deposited blends with nanocrystalline morphology, tandem cells have achieved efficiencies of 10% in our lab. Recently we have extended our analysis to understand polaron and exciton dynamics at organic/inorganic semiconductor junctions.  We will discuss these and other aspects of the photon-to-electron conversion process that lead from nanostructural control to high efficiency organic and hybrid solar cells.

 

1. N. C. Giebink, B. E. Lassiter, G. P. Wiederrecht, M. R. Wasielewski and S. R. Forrest, Phys. Rev. B 82,155306(2010).

2. N. C. Giebink, G. P. Wiederrecht, M. R. Wasielewski and S. R. Forrest, Phys. Rev. B 82,155305(2010).

3. J. D. Zimmerman, X. Xiao, C. K. Renshaw, S. Wang, V. V. Diev, M. E. Thompson and S. R. Forrest, Nano Lett. 12,4366(2012).





Department of Materials Science and Engineering

MSE BK21+ / Center for Advanced Soft Electronics






229개(10/12페이지)
세미나안내
번호 제목 글쓴이 조회 날짜
49 [2014 09 10] 정기세미나 3rd 관리자 2865 2014.09.16 16:40
48 [2014 09 10] 정기세미나 2nd 첨부파일 관리자 2731 2014.09.02 13:09
47 [2014 09 03] 정기세미나 1st 첨부파일 관리자 2637 2014.09.02 13:09
46 [2014 09 02] 특별세미나 (BK21PLUS) 첨부파일 관리자 2660 2014.09.02 13:06
45 [2014 06 11] 정기세미나 12th 관리자 2753 2014.06.09 16:03
44 [2014 06 09] 특별세미나 (BK21PLUS) 관리자 2607 2014.06.09 08:37
43 [2014 06 03] 특별세미나 (BK21PLUS) 관리자 2761 2014.06.03 14:55
42 [2014 05 28] 정기세미나 11th 관리자 2874 2014.05.26 18:17
41 [2014 05 21] 정기세미나 10th 관리자 2622 2014.05.19 11:03
40 [2014 05 14] 정기세미나 9th 관리자 2744 2014.05.13 08:52
39 [2014 05 13] 특별세미나 (BK21PLUS) 관리자 3476 2014.05.12 11:44
38 [2014 05 09] 특별세미나 (BK21PLUS) 관리자 3440 2014.05.09 08:55
37 [2014 05 07] 정기세미나 8th 관리자 2606 2014.05.07 10:25
36 [2014 05 03] 특별세미나 (BK21PLUS-고분자연구소) 관리자 2902 2014.04.30 11:34
35 [2014 04 30] 정기세미나 7th 관리자 2894 2014.04.29 11:42
34 [2014 04 24] 특별세미나 (BK21PLUS-IBS) 첨부파일 관리자 2913 2014.04.16 14:19
33 [2014 04 16] 정기세미나 6th 관리자 2754 2014.04.14 13:59
32 [2014 04 15] 특별세미나 (신소재공학과 석학교수) 관리자 3207 2014.04.14 13:07
31 [2014 04 09] 정기세미나 5th 관리자 2881 2014.04.01 08:58
30 [2014 04 17] 특별세미나 (BK21PLUS) 관리자 2996 2014.04.02 11:30