Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, USA.
Nano Lett. 2010 Jul 14;10(7):2635-9. doi: 10.1021/nl1013663.
We describe bulk heterojunction (BHJ) solar cells containing blends of colloidal PbS nanocrystal quantum dots with several new donor-acceptor conjugated polymers. Using photoinduced absorption spectroscopy we found that blends of PbS quantum dots with one polymer, poly(2,3-didecyl-quinoxaline-5,8-diyl-alt-N-octyldithieno[3,2-b:2',3'-d]pyrrole) (PDTPQx), produce significantly more photoinduced charge than blends of PbS with the other donor-acceptor polymers or with traditionally studied polymers like [2-methoxy-5-(3',7'-dimethyloctyloxy)-para-phenylene vinylene] (MDMO-PPV) and poly(3-hexylthiophene) (P3HT). Photovoltaic devices made with PDTPQx/PbS blends exhibit power conversion efficiencies 10-100 times larger than previously reported BHJ blends made with IR-absorbing quantum dots.
我们描述了含有胶体 PbS 纳米晶量子点与几种新型供体-受体共轭聚合物混合物的体异质结 (BHJ) 太阳能电池。通过光致吸收光谱，我们发现 PbS 量子点与一种聚合物聚（2,3-二癸基喹喔啉-5,8-二基-alt-N-辛基二噻吩并[3,2-b:2',3'-d]吡咯）（PDTPQx）的混合物比 PbS 与其他供体-受体聚合物或与传统研究的聚合物如[2-甲氧基-5-（3',7'-二甲氧基辛基）-对苯乙炔]（MDMO-PPV）和聚（3-己基噻吩）（P3HT）的混合物产生更多的光诱导电荷。使用 PDTPQx/PbS 混合物制成的光伏器件的功率转换效率比以前报道的用吸收红外光的量子点制成的 BHJ 混合物大 10-100 倍。
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