共軛聚合物與聚合物太陽能電池專題1

1、共軛聚合物與聚合物太共軛聚合物與聚合物太 陽能電池陽能電池 侯劍輝侯劍輝 研究員研究員 中科院化學(xué)所，高分子物理與化學(xué)國家重點(diǎn)實(shí)驗(yàn)室中科院化學(xué)所，高分子物理與化學(xué)國家重點(diǎn)實(shí)驗(yàn)室 教授教授 北京科技大學(xué)化學(xué)與生物工程學(xué)院北京科技大學(xué)化學(xué)與生物工程學(xué)院 未來五十年人類面臨的十大挑戰(zhàn)未來五十年人類面臨的十大挑戰(zhàn) ENERGY WATER FOOD ENVIRONMENT POVERTY TERRORISM et al. Science 2002 ,295,2425-2427 20042004年，能量轉(zhuǎn)換效率達(dá)到年，能量轉(zhuǎn)換效率達(dá)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