Simultaneous defect passivation and energy level modulation by multifunctional phthalocyanine for efficient and stable perovskite solar cells

doi:10.1016/j.cej.2023.141573

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	Simultaneous defect passivation and energy level modulation by multifunctional phthalocyanine for efficient and stable perovskite solar cells
	J. Zhang, T. Liu, Z. Bao, H. Liu, Y. Lv, X. Guo, X. Liu, Y. Chang and B. Li
	2023
Source Publication	Chemical Engineering Journal
ISSN	13858947
Volume	459
Abstract	Interface passivation is an effective means to decrease detrimental defects and realize highly efficient and stable perovskite solar cells (PSCs). Nevertheless, most of the interfacial passivators currently used are easily formed mismatched energy levels and impede the extraction of photogenerated charge carriers. Herein, a metal-free H2-phthalocyanine (H2Pc) is reported to passivate the interface defects and improve the crystallinity and energy level alignment. Contrasting metal Zn-phthalocyanine, the pyrrolic nitrogen and N–H bond in the structure of the H2Pc molecule exhibit a higher capability to interact with unsaturated Pb and I site. It is found that the defects passivation and improved crystallinity in H2Pc molecule treatment are achieved by the formation of coordination bonding between N atoms and uncoordinated Pb2+ ions and hydrogen bonding between N–H bond and I (iodine). Simultaneously, the H2Pc treatment can also improve energy level alignment and promote the charge extraction from perovskite to the hole transport material layer. As a result, a champion power conversion efficiency (PCE) of 20.59 % is achieved for the H2Pc PSCs, which is higher than that of 18.54 % for the ZnPc PSCs and 16.50 % for the pristine PSCs. Meanwhile, the H2Pc device shows significantly improved moisture, thermal, and illumination stability and with retaining over 90 % of its initial PCE after aging for 1000 h at about 20 % relative humidity in ambient conditions. The present work provides a practical and efficient method of simultaneous defect passivation and energy level modulation and toward the purpose of attaining superior performance PSCs and other perovskite-based electronics. © 2023
DOI	10.1016/j.cej.2023.141573
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Indexed By	sci ; ei
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Document Type	期刊论文
Identifier	http://ir.ciomp.ac.cn/handle/181722/68170
Collection	中国科学院长春光学精密机械与物理研究所
Recommended Citation GB/T 7714	J. Zhang, T. Liu, Z. Bao, H. Liu, Y. Lv, X. Guo, X. Liu, Y. Chang and B. Li. Simultaneous defect passivation and energy level modulation by multifunctional phthalocyanine for efficient and stable perovskite solar cells[J]. Chemical Engineering Journal,2023,459.
APA	J. Zhang, T. Liu, Z. Bao, H. Liu, Y. Lv, X. Guo, X. Liu, Y. Chang and B. Li.(2023).Simultaneous defect passivation and energy level modulation by multifunctional phthalocyanine for efficient and stable perovskite solar cells.Chemical Engineering Journal,459.
MLA	J. Zhang, T. Liu, Z. Bao, H. Liu, Y. Lv, X. Guo, X. Liu, Y. Chang and B. Li."Simultaneous defect passivation and energy level modulation by multifunctional phthalocyanine for efficient and stable perovskite solar cells".Chemical Engineering Journal 459(2023).

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中国科学院长春光学精密机械与物理研究所