Brauer Jan C, Lee Yong Hui, Nazeeruddin Mohammad Khaja, Banerji Natalie
Departement of Chemsitry, University of Fribourg , Chemin du Musée 9, CH-1700 Fribourg, Switzerland.
Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne , CH-1015 Lausanne, Switzerland.
J Phys Chem Lett. 2015 Sep 17;6(18):3675-81. doi: 10.1021/acs.jpclett.5b01698. Epub 2015 Sep 4.
Organometal halide perovskites have emerged as promising next-generation solar cell technologies presenting outstanding efficiencies. However, many questions concerning their working principles remain to be answered. Here, we present a detailed study of hole transfer dynamics into polymeric hole transporting materials (HTMs), poly(triarylamine) (PTAA), poly(3-hexylthiophee-2,5-diyl (P3HT), and poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b']dithiophene)-alt-4,7-(2,1,3-benzothiadiazole) (PCPDTBT). The hole transfer dynamics are shown to occur on a time scale of thousands of picoseconds, being orders of magnitude slower compared to hole transfer involving commonly used Spiro-OMeTAD as HTM.
有机金属卤化物钙钛矿已成为具有卓越效率的下一代有前景的太阳能电池技术。然而，关于其工作原理仍有许多问题有待解答。在此，我们对空穴向聚合物空穴传输材料（HTM）、聚（三芳基胺）（PTAA）、聚（3 - 己基噻吩 - 2,5 - 二基）（P3HT）以及聚[2,6 - （4,4 - 双（2 - 乙基己基） - 4H - 环戊[2,1 - b;3,4 - b']二噻吩） - 交替 - 4,7 - （2,1,3 - 苯并噻二唑）]（PCPDTBT）中的转移动力学进行了详细研究。结果表明，空穴转移动力学发生在数千皮秒的时间尺度上，与涉及常用的Spiro - OMeTAD作为HTM的空穴转移相比，慢了几个数量级。
