Simultaneous bottom-up double-layer synergistic engineering by multifunctional natural molecules for efficient and stable SnO2-based planar perovskite solar cells

被引:5
|
作者
Liu, Yue [1 ]
Gao, Yanbo [1 ]
Li, Tingting [2 ]
Bao, Xinyu [1 ]
Xu, Zehua [1 ]
Zhang, Fujun [1 ]
Lu, Min [1 ]
Wu, Zhennan [1 ]
Wu, Yanjie [1 ]
Sun, Guang [3 ]
Bai, Xue [1 ]
Shi, Zhifeng [4 ]
Hu, Junhua [5 ]
Zhang, Yu [1 ]
机构
[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, 2699 Qianjin St, Changchun 130012, Jilin, Peoples R China
[2] Jilin Jianzhu Univ, Sch Mat Sci & Engn, Changchun 130018, Jilin, Peoples R China
[3] Jilin Univ, China Japan Union Hosp, Changchun 130012, Jilin, Peoples R China
[4] Zhengzhou Univ, Dept Phys & Engn, Key Lab Mat Phys, Minist Educ, Zhengzhou 450052, Henan, Peoples R China
[5] Zhengzhou Univ, State Ctr Int Cooperat Designer Low carbon & Envir, Sch Mat Sci & Engn, Zhengzhou 450001, Henan, Peoples R China
来源
JOURNAL OF ENERGY CHEMISTRY | 2023年 / 80卷
关键词
Perovskite solar cells; X-Carrageenan; Interfacial modification; Stability; Defect passivation; PASSIVATION; PERFORMANCE;
D O I
10.1016/j.jechem.2023.01.029
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The performance and stability of perovskite solar cells (PSCs) is limited by detrimental defects, mostly distributed at the grain boundary (GB) of bulk perovskite film and interface, which induce serious carrier non-radiative recombination. Therefore, there is particularly urgent to realize simultaneous passivation of bulk defects and interfacial defects. In this work, a simple, low-cost and effective multifunctional mod-ification strategy is developed by introducing the X-Carrageenan (X-C) as the interfacial layer of SnO2/per-ovskite. The sulfate groups of X-C not only play a positive role in passivating the Sn4+ from SnO2 film, resulting in high conductivity, but also effectively passivate the defects at the SnO2/perovskite interface. Meanwhile, X-C can effectively passivate the defects in the perovskite film due to the strong binding force between the high content of sulfate groups and PbI2. The synergistic effect of X-C simultaneously achieves interfacial defects and bulk defects passivation, better crystalline quality, suppressed charge recombina-tion, released interfacial stress and more favorable interfacial energy level alignment. Based on the above efficient synergy, the X-C-modified device achieves a high efficiency of 23.81%, which is -24.53 % higher than the control device (19.12 %). To our best knowledge, 23.81 % of power conversion efficiency (PCE) is the highest reported PCE value of PSCs employing green natural additives. Moreover, long-term and ther-mal stabilities are significantly improved after interface modification. Thus, this work provides an idea for developing multifunctional natural materials towards the attainment of the efficient and stable PSCs.(c) 2023 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press.
引用
收藏
页码:40 / 47
页数:8
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