On the morphology of polymer-based photovoltaics

被引:298
作者
Liu, Feng [1 ]
Gu, Yu [1 ]
Jung, Jae Woong [2 ,3 ]
Jo, Won Ho [2 ,3 ]
Russell, Thomas P. [1 ,4 ]
机构
[1] Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA
[2] Seoul Natl Univ, WCU Hybrid Mat Program, Seoul 151742, South Korea
[3] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151742, South Korea
[4] Tohoku Univ, WPI Adv Inst Mat Res WPI AIMR, Sendai, Miyagi 980, Japan
关键词
conjugated polymers; diffusion; miscibility; morphology; neutron scattering; organic photovoltaics; phase separation; X-ray scattering; HETEROJUNCTION SOLAR-CELLS; POWER CONVERSION EFFICIENCY; INTERNAL QUANTUM EFFICIENCY; VERTICAL PHASE-SEPARATION; OPEN-CIRCUIT VOLTAGE; BAND-GAP POLYMER; THIN-FILMS; MDMO-PPV; SEMICONDUCTING POLYMERS; NANOSCALE MORPHOLOGY;
D O I
10.1002/polb.23063
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
We review the morphologies of polymer-based solar cells and the parameters that govern the evolution of the morphologies and describe different approaches to achieve the optimum morphology for a BHJ OPV. While there are some distinct differences, there are also some commonalities. It is evident that morphology and the control of the morphology are important for device performance and, by controlling the thermodynamics, in particular, the interactions of the components, and by controlling kinetic parameters, like the rate of solvent evaporation, crystallization and phase separation, optimized morphologies for a given system can be achieved. While much research has focused on P3HT, it is evident that a clearer understanding of the morphology and the evolution of the morphology in low bad gap polymer systems will increase the efficiency further. While current OPVs are on the verge of breaking the 10% barrier, manipulating and controlling the morphology will still be key for device optimization and, equally important, for the fabrication of these devices in an industrial setting. (C) 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2012
引用
收藏
页码:1018 / 1044
页数:27
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