The effects of pyridine molecules structure on the defects passivation of perovskite solar cells
The effects of pyridine molecules structure on the defects passivation of perovskite solar cells
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吡啶分子结构对钙钛矿太阳能电池缺陷钝化的影响
DOI：
10.1007/s10008-021-04905-1
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发表时间：
2021-03
影响因子：
2.5
通讯作者：
Zhipeng Huo
中科院分区：
文献类型：
--
作者：
Yan Zhang;Qiao Wang;Kuyu Duan;Lu Wang;Li Tao;Jun Zhang;Hao Wang;Zhipeng Huo
吡啶分子已被广泛用于改善钙钛矿太阳能电池（PSC）的性能。然而，吡啶分子结构，特别是官能团对钙钛矿太阳能电池缺陷钝化的影响还缺乏研究。本工作中，我们将吡啶（PY）、4-甲基吡啶（MP）和4-叔丁基吡啶（TBP）三种吡啶分子作为添加剂引入到钙钛矿层中，研究了分子结构对钙钛矿太阳能电池表面缺陷钝化和长期稳定性的影响。事实上，吡啶分子在钙钛矿薄膜中起着两种作用。一方面，由于分子结构的不同，这些吡啶分子呈现出不同的电子对给体能力（TBP> MP> PY），进而影响吡啶分子与钙钛矿中Pb~（2+）的相互作用。重要的是，随着不同官能团与Pb2+之间相互作用的增加，缺陷钝化效果增强。更重要的是，通过大的晶体尺寸和缓慢的生长过程，相应的钙钛矿层的晶体质量和光捕获能力得到改善。添加TBP、MP和PY的PSC的能量转换效率分别为17.03%、15.49%和14.34%，高于未添加添加剂的PSC的能量转换效率（13.34%）。另一方面，由于基团的疏水性，吡啶分子可以增强器件的水分稳定性。值得注意的是，基于TBP改性的钙钛矿薄膜的器件在四种类型的器件中表现出改善的水分稳定性，这是由于TBP中具有疏水性的叔丁基的最佳特性。
Pyridine molecules have been widely used to improve the performances of perovskite solar cells (PSCs). However, the effects of pyridine molecular structure, especially the functional group, on the defects passivation of perovskite solar cell have a lack of investigation. In this work, we introduced three pyridine molecules as additives into perovskite layer, including pyridine (PY), 4-methyl-pyridine (MP) and 4-tertbutyl pyridine (TBP), to investigate the influences of the molecular structure on the surface-defect passivation and long-term stability of perovskite solar cells. In fact, the pyridine molecules play two roles in the perovskite films. On the one hand, due to the different molecular structure, these pyridine molecules present differences in electron-pair-donor abilities (TBP > MP > PY), and then affect the interaction of pyridine molecule with Pb2+in perovskite. Importantly, with the increase of interaction between different functional groups and Pb2+, the defect passivation effect was enhanced. What’s more, the crystal quality and light harvesting ability of the corresponding perovskite layer are improved by large crystal size and slow growth process. Consequently, PSCs with TBP, MP and PY respectively obtained a power conversion efficiency of 17.03%, 15.49% and 14.34%, which are higher than that of without additive (13.34%). On the other hand, owing to the hydrophobicity of groups, the pyridine molecules can enhance the moisture stability of devices. Significantly, the device based on the TBP-modified perovskite film exhibited improved moisture stability among the four type devices, owing to the best characteristic of the tertiary-butyl group with hydrophobicity in TBP.
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影响因子：
56.9
作者：
Lee, Michael M.;Teuscher, Joel;Snaith, Henry J.
通讯作者：
Snaith, Henry J.
影响因子：
35
作者：
Heo, Jin Hyuck;Im, Sang Hyuk;Seok, Sang Il
通讯作者：
Seok, Sang Il
影响因子：
8.6
作者：
H. Tsai;W. Nie;P. Cheruku;N. Mack;Ping Xu;Gautam Gupta;A. Mohite;Hsing-lin Wang
通讯作者：
H. Tsai;W. Nie;P. Cheruku;N. Mack;Ping Xu;Gautam Gupta;A. Mohite;Hsing-lin Wang
影响因子：
41.2
作者：
Tsvetkov, Nikolai;Lu, Qiyang;Yildiz, Bilge
通讯作者：
Yildiz, Bilge
影响因子：
--
作者：
Haiying Zheng;Liangzheng Zhu;Linhua Hu;Shangfeng Yang;Shuanghong Chen;A. Alsaedi;T. Hayat;Y. Huang-Y.
通讯作者：
Haiying Zheng;Liangzheng Zhu;Linhua Hu;Shangfeng Yang;Shuanghong Chen;A. Alsaedi;T. Hayat;Y. Huang-Y.