Effects of a Molecular Monolayer Modification of NiO Nanocrystal Layer Surfaces on Perovskite Crystallization and Interface Contact toward Faster Hole Extraction and Higher Photovoltaic Performance

Bai Yang; Chen Haining; Xiao Shuang; Xue Qifan; Zhang Teng; Zhu Zonglong; Li Qiang; Hu Chen; Yang Yun; Hu Zhicheng; Huang Fei; Wong Kam Sing; Yip Hin-Lap; Yang Shihe

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Effects of a Molecular Monolayer Modification of NiO Nanocrystal Layer Surfaces on Perovskite Crystallization and Interface Contact toward Faster Hole Extraction and Higher Photovoltaic Performance

机译：NiO纳米晶体层表面分子单分子层修饰对钙钛矿结晶和界面接触的影响，以实现更快的空穴提取和更高的光伏性能

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NiO is a promising hole transporting material for perovskite solar cells due to its high hole mobility, good stability, easy processibility, and suitable Fermi level for hole extraction. However, the efficiency of NiO-based cells is still limited by the slow hole extraction due to the poor perovskite/NiO interface and the inadequate quality of the two solution-processed material phases. Here, large influences of a monolayer surface modification of NiO nanocrystal layers with ethanolamine molecules are demonstrated on the enhancement of hole extraction/transport and thus the photovoltaic performance. The underlying causes have been revealed by a series of studies, pointing to a favorable dipole layer formed by the molecular adsorption along with the enhanced perovskite crystallization and the improved interface contact. Comparatively, the solar cells based on a diethanolamine-modified NiO layer have achieved a rather high fill factor, indeed one of the highest among NiO-based perovskite solar cells, and high short-circuit photocurrent density (J(sc)), resulting in a power conversion efficiency of approximate to 16%, most importantly, without hysteresis.

机译：NiO具有高的空穴迁移率，良好的稳定性，易加工性以及适合用于空穴提取的费米能级，因此是钙钛矿型太阳能电池有希望的空穴传输材料。然而，由于差的钙钛矿/ NiO界面以及两个溶液处理的材料相的质量不足，NiO基电池的效率仍然受到空穴提取速度的限制。在此，证实了用乙醇胺分子对NiO纳米晶体层进行单层表面改性对空穴提取/传输的增强以及由此产生的光伏性能的影响很大。一系列研究已经揭示了潜在的原因，指出了由分子吸附以及增强的钙钛矿结晶和改善的界面接触形成的有利偶极层。相比之下，基于二乙醇胺改性的NiO层的太阳能电池实现了相当高的填充因子，实际上是NiO基钙钛矿太阳能电池中最高的填充因子，而且短路电流电流密度（J（sc））高，从而导致最重要的是，没有迟滞的功率转换效率约为16％。

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《Advanced Functional Materials》 |2016年第17期|2950-2958|共9页
作者
Bai Yang; Chen Haining; Xiao Shuang; Xue Qifan; Zhang Teng; Zhu Zonglong; Li Qiang; Hu Chen; Yang Yun; Hu Zhicheng; Huang Fei; Wong Kam Sing; Yip Hin-Lap; Yang Shihe;
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Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China;

Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China;

Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China|Hong Kong Univ Sci & Technol, Nano Sci & Technol Program, Kowloon, Hong Kong, Peoples R China;

S China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China|Hong Kong Univ Sci & Technol, Nano Sci & Technol Program, Kowloon, Hong Kong, Peoples R China;

Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China|Hong Kong Univ Sci & Technol, Nano Sci & Technol Program, Kowloon, Hong Kong, Peoples R China;

Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China;

Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China;

Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China;

S China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

S China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China;

S China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China;

Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China|Hong Kong Univ Sci & Technol, Nano Sci & Technol Program, Kowloon, Hong Kong, Peoples R China;

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1. High-Performance Hole-Extraction Layer of Sol-Gel-Processed NiO Nanocrystals for Inverted Planar Perovskite Solar Cells [J] . Zhu Zonglong, Bai Yang, Zhang Teng, Angewandte Chemie . 2014,第46期

机译：溶胶-凝胶法制备的NiO纳米晶体用于平面钙钛矿太阳能电池的高性能空穴提取层。
2. Effects of interface modification with self-assembled monolayers on the photovoltaic performance of CdS quantum dots sensitized solar cells [J] . Yang Lili, Chen Gang, Sun Yunfei, Electrochimica Acta . 2015,第Null期

机译：自组装单层界面修饰对CdS量子点敏化太阳能电池光伏性能的影响
3. NiO_x-Seeded Self-Assembled Monolayers as Highly Hole-Selective Passivating Contacts for Efficient Inverted Perovskite Solar Cells [J] . Juanjuan Sun, Chunhui Shou, Jingsong Sun, Solar RRL . 2021,第11期

机译：NIO_X接种的自组装单层作为高度孔选择的钝化触点，用于有效倒置钙钛矿太阳能电池
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机译：有机无机光伏器件中分子单层界面处理的比较
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机译：固液界面处的自组装单分子层：与均相系统相比，分子变异的设计，后修饰和影响。
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机译：通过CH3NH3I修饰TiO2-钙钛矿层界面增强CH3NH3PbI3-xClx钙钛矿太阳能电池的性能
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机译：镍氧化镍孔 - 传输层通过自组装单层在钙钛矿太阳能电池中的影响
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机译：表面增强非线性光学效应和吸附分子单分子膜的检测

Effects of a Molecular Monolayer Modification of NiO Nanocrystal Layer Surfaces on Perovskite Crystallization and Interface Contact toward Faster Hole Extraction and Higher Photovoltaic Performance

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