基于低界面张力的面-面堆叠聚合物共混物的高性能全聚合物太阳能电池。
High-Performance All-Polymer Solar Cells Based on Face-On Stacked Polymer Blends with Low Interfacial Tension.
作者信息
Kang Hyunbum, Kim Ki-Hyun, Choi Joonhyeong, Lee Changyeon, Kim Bumjoon J
机构信息
Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea.
出版信息
ACS Macro Lett. 2014 Oct 21;3(10):1009-1014. doi: 10.1021/mz500415a. Epub 2014 Sep 16.
We report highly efficient all-polymer solar cells with power conversion efficiencies of over 4.5% by highly intermixed blends of PTB7-Th donor and P(NDI2OD-T2) acceptor polymers. The low interfacial tension and the face-on π-π stackings of the all-polymer blends afforded desired nanophase morphology, which facilitates efficient charge transport from the active layer to each electrode. In addition, the incorporation of 1,8-diiodooctane additives was able to tune the degree of crystallinity and orientation of P(NDI2OD-T2) acceptors, resulting in remarkable enhancement of electron mobility, external quantum efficiency, and values.
我们报道了通过聚噻吩并[3,2-b]噻吩-2,6-二(4-(2-乙基己基)噻吩)-4,7-二噻吩并[2,3-b:3',2'-d]噻吩（PTB7-Th）供体聚合物与聚(2,6-(4,8-双(5-(2-乙基己基)噻吩-2-基)萘并[1,2-b:5,6-b']二噻吩)-alt-5,5-(1',3'-二-2-噻吩基-5',7'-双(2-乙基己基)苯并[1',2'-c:4',5'-c']二噻吩-4,8-二酮)(P(NDI2OD-T2))受体聚合物的高度混合共混物制备出功率转换效率超过4.5%的高效全聚合物太阳能电池。全聚合物共混物的低界面张力和面对面的π-π堆积提供了所需的纳米相形态，这有利于电荷从活性层到每个电极的有效传输。此外，加入1,8-二碘辛烷添加剂能够调节P(NDI2OD-T2)受体的结晶度和取向程度，从而显著提高电子迁移率、外量子效率和相关值。
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