Laboratory for Photomolecular Science, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, 1015-, Lausanne, Switzerland.
Institute of Organic Chemistry II and Advanced Materials, University of Ulm, Albert-Einstein-Allee 11, 89081, Ulm, Germany.
ChemSusChem. 2016 Mar 8;9(5):433-8. doi: 10.1002/cssc.201501510. Epub 2016 Jan 27.
We developed a new donor-π-acceptor-type hole-transport material (HTMs) incorporating S,N-heteropentacene as π-spacer, triarylamine as donor, and dicyanovinylene as acceptor. In addition to appropriate frontier molecular orbital energies, the new HTM showed high photo absorptivity in the visible region. Without the use of p-dopants, solution-processed mixed perovskite devices using the HTM achieved power conversion efficiencies of up to 16.9% and high photocurrents of up to 22.2 mA cm(-2). These results demonstrate that heteroacene can be an excellent building block to prepare alternative HTMs for perovskite solar cells and hold promise for further advancement through fine-tuning the molecular structure.
我们开发了一种新型的给体-π-受体型空穴传输材料（HTM），其中包含 S,N-杂并五苯作为π-间隔基、三苯胺作为给体和二氰乙烯基作为受体。除了适当的前沿分子轨道能量外，新型 HTM 在可见光区域显示出高的光吸收率。在不使用 p 型掺杂剂的情况下，使用 HTM 的溶液处理混合钙钛矿器件实现了高达 16.9%的功率转换效率和高达 22.2 mA cm(-2) 的高光电流。这些结果表明，杂并五苯可以作为制备钙钛矿太阳能电池替代 HTM 的优秀构建块，并有望通过精细调整分子结构进一步得到发展。
