有机聚合物太阳能电池中二元和三元组分给体-受体(D-A)型聚合物的性能研究
Comparative Investigation of Binary and Ternary Donor-Acceptor Conjugated Polymer for Photovoltaic Application
DOI: 10.12677/MS.2018.81001, PDF,  被引量    科研立项经费支持
作者: 王雪娇, 徐炜娟, 王建军：苏州大学材料与化学化工学部，江苏 苏州；袁建宇：苏州大学功能纳米与软物质研究院(FUNSOM)，江苏省碳基功能材料与器件重点实验室，江苏 苏州
关键词: 三元共轭聚合物；聚合物太阳能电池；形貌；Ternary Conjugated Polymers； Polymer Solar Cells； Morphology
摘要: 本项研究中，我们设计制备了窄带隙给体–受体(D-A)型二元共轭聚合物P1和具有规整主链结构的D1-A-D2-A型三元共轭聚合物P2。通过精确地控制共轭聚合物的主链结构的单元分布，聚合物的光学和电学性质得到了精确的调控。形成窄光学带隙的同时降低了聚合物的最高电子占据态能级(HOMO)，增强了分子主链的共平面性以及聚合物分子间的π-π堆积。在本工作中，我们进一步深入研究了这种结构规整型三元共轭聚合物在有机太阳能电池中的应用。以三元聚合物P2为电子给体，富勒烯衍生物PCBM作为电子受体，在没有任何添加剂的条件下，相比于基于二元聚合物P1的电池器件，基于P2的聚合物太阳能电池获得了显著提高的开路电压(Voc)，短路电流(Jsc)和填充因子，并由此得到了最高5%的光电转换效率(PCE)，这一结果相对于以D-A结构的P1聚合物为基础制备的器件有了很大提高。我们的结果证明了三元组分聚合物的设计策略的重要性，对进一步提高有机聚合物太阳能电池具有一定的价值。
Abstract: Narrow band gap D-A conjugated polymer P1 and D1-A-D2-A ternary conjugated polymer P2 with regioregular backbone structure were designed and synthesized. By precisely controlling the ar-rangement of the third building block, the polymer properties can be comprehensively and deli-cately tuned, resulting in more balanced optical bandgap and highest occupied molecular orbital (HOMO) energy levels, planar structure and strong intermolecular packing. Here, the influence of third unit on material microcosmic and macrocosmic properties was examined exclusively. By using [70]PCBM as the electron acceptor, the optimized polymer solar cells without any additive demonstrated an increased open circuit voltage (Voc), short-circuit current density (Jsc) and fill factor (FF) in ternary polymer P2 based device, and a best PCE of 5%, which is significantly en-hanced in comparison with D-A polymer P1 based device. Our results highlight the importance of ternary molecular designing strategy and may achieve control of desirable device properties by optimizing molecular structure in the future.
文章引用：王雪娇, 徐炜娟, 王建军, 袁建宇. 有机聚合物太阳能电池中二元和三元组分给体-受体(D-A)型聚合物的性能研究[J]. 材料科学, 2018, 8(1): 1-10. https://doi.org/10.12677/MS.2018.81001

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