共轭聚合物与聚合物太阳能电池专题1

1、共轭聚合物与聚合物太共轭聚合物与聚合物太 阳能电池阳能电池 侯剑辉侯剑辉 研究员研究员 中科院化学所，高分子物理与化学国家重点实验室中科院化学所，高分子物理与化学国家重点实验室 教授教授 北京科技大学化学与生物工程学院北京科技大学化学与生物工程学院 未来五十年人类面临的十大挑战未来五十年人类面临的十大挑战 ENERGY WATER FOOD ENVIRONMENT POVERTY TERRORISM et al. Science 2002 ,295,2425-2427 20042004年，能量转换效率达到年，能量转换效率达到 3.85%3.85% P3HT/PCBM, C.J. Brabec，

2、Solar Energy Materials reducing steric hindrance caused by bulky non-conjugated part; planar conjugated structure; 2-dimensional conjugated structure; etc. Intramolecular charge transport can be improved by enhancing p p-electron delocalizability. Seldom studied. (Possibly by reducing aromatic prope

3、rties of conjugated components; quinoid structure; etc.) Hole mobility: 3 orders higher Z3Z4 Twist angel 38.2o14.9o m mhole cm2/(vs)1.84*10-72.5*10-5 HOMO eV-5.2-4.8 J. of Phy.Chem. C 2009, 113, 21202-21207. Adv. Mater. 2009, 21, 4238. Two examples Donor: Molecular structure optimization of BDT-base

4、d polymers as highly efficient photovoltaic materials Acceptor: Indene-substituted fullerenes Example 1. Molecular structure optimization of polymer electron donor materials based on Benzo1,2-b:4,5-bdithiophene (BDT). Merits Planar conjugated structure Easy for synthesis and purification Patent appl

5、ication: “Acive materials for photoelectric devices”, WO2010036494-A1 Inventor(s): HOU Jianhui; YANG Yang. Band gap Jsc=15 (mA/cm2) PCE=5.7%; FF=66% Liang et al. J. Am. Chem. Soc. 2009, 131, 5657. 1st step: replacing ester group by carbonyl group 2nd step: Adding F atom to enhance electron- withdrawing effect. PV properties of the three PBDTTT-polymer based devices Nature Photonics 20