Near-Infrared-Absorbing and Dopant-Free Heterocyclic Quinoid-Based Hole-Transporting Materials for Efficient Perovskite Solar Cells

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• 作者：Dr. Jen-Shyang Ni ; Hsiao-Chi Hsieh ; Chun-An Chen ; Dr. Yuh-Sheng Wen ; Dr. Wen-Ti Wu ; Yen-Chen Shih ; Prof. King-Fu Lin ; Prof. Leeyih Wang and Prof. Jiann T. Lin
• 刊名：ChemSusChem
• 出版年：2016
• 出版时间：November 23, 2016
• 年：2016
• 卷：9
• 期：22
• 页码：3139-3144
• 全文大小：1106K
• ISSN：1864-564X

文摘

New heterocyclic quinoid-based hole transporting materials (HTMs) with a rigid quinoid core [3,6-di(2H-imidazol-2-ylidene)cyclohexa-1,4-diene] have been synthesized. The new HTMs have good hole mobility (>10⁻⁴ cm² V⁻¹ s⁻¹) and very intense absorption in the near-infrared region extending to >800 nm. High performance perovskite solar cells can be fabricated using these HTMs without dopant. The best cell efficiency under simulated AM 1.5 G illumination reaches 12.22 %, which is comparable with that (12.58 %) using doped 2,2′,7,7′-tetrakis-(N,N-di-4-methoxyphenylamino)-9,9′-spirobifluorene (spiro-OMeTAD) as the HTM.