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首页> 中文期刊> 《中国化学工程学报：英文版》 >An asymmetrically substituted dithieno3,2-b:2',3'-dpyrrole organic small-molecule hole-transporting material for high-performance perovskite solar cells

An asymmetrically substituted dithieno3,2-b:2',3'-dpyrrole organic small-molecule hole-transporting material for high-performance perovskite solar cells

         
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Hole-transporting materials play a vital role in terms of the performance of perovskite solar cells(PSCs).The dithieno[3,2-b:2’,3’-d]pyrrole(DTP),an S,N-heterocyclic building block,has been proved to be desirable for molecular design of hole-transporting materials in PSCs.We developed an asymmetrically substituted DTP small-molecule(JW12)and a reference compound(JW11).The asymmetrical structure of JW12 leads to different absorption properties and electron distribution.The device in a planar n-i-p architecture using JW12 shows a much higher PCE(18.07%)than that based on JW11(15.46%),which is also better than the device based on spiro-OMe TAD(17.47%).We hope our research can provide a new perspective in molecular design of organic HTMs for perovskite solar cells.

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