Similar or different: the same Spiro-core but different alkyl chains with apparently improved device performance of perovskite solar cells

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2019,（6）
• 页码范围: 739-745
• 页数: 7页
• 语种: 英文

摘要

By intelligently utilizing the odd-even effect existing in the melting points of alkanes as presented in the basic textbook of Organic Chemistry,different alkoxy groups were introduced to modify the structure of commercial Spiro-OMeTAD to give new Spiro derivatives of Spiro-OEtTAD,Spiro-OPrTAD,Spiro-OiPrTAD and Spiro-OBuTAD,with the aim to adjust the molecular packing status in perovskite solar cells as hole transporting compounds.Excitedly,with the introduction ofethoxy groups instead of the methoxy ones in Spiro-OMeTAD,Spiro-OEtTAD-based perovskite solar cells demonstrated the highest device performance of 20.16％,higher than that of Spiro-OMeTAD (18.64％).