INTERFACIAL PASSIVATION FOR ENHANCED PERFORMANCE OF PEROVSKITE SOLAR CELLS VIA BY 2-MERCAPTOPYRIMIDINE

Du Lin; Peng Changtao; Tang Yu; Jiang Yutong; Shu Hui; Huang Yuelong

doi:10.19912/j.0254-0096.tynxb.2021-0267

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (9) : 73-77. DOI: 10.19912/j.0254-0096.tynxb.2021-0267

INTERFACIAL PASSIVATION FOR ENHANCED PERFORMANCE OF PEROVSKITE SOLAR CELLS VIA BY 2-MERCAPTOPYRIMIDINE

Du Lin, Peng Changtao, Tang Yu, Jiang Yutong, Shu Hui, Huang Yuelong

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Abstract

It was investigated that 2-mercaptopyrimidine （2-MP） passivated the interface between the perovskite layer and hole transport layer of a triple cation perovskite solar cell, which improved the photoelectric properties of the film and the device. Steady-state and time-resolved photoluminescence fluorescence spectrum characterization results showed that non-radiative recombination of the passivated perovskite film was suppressed. In addition, the work function characterizations by KPFM illustrated that the energy level of PVK/2-MP/Spiro matched better than that of PVK/2-MP/Spiro, that is beneficial to suppress carrier recombination and enhance open-circuit voltage. After passivation, the hydrophobicity of the film was enhanced which is helpful to block water vapor erosion and improve stability. The open-circuit voltage dependence on light intensity shows that 2-MP effectively passivates the interface defects and suppress the non-radiative recombination of carriers. The J-V test showed that the photoelectric performance of the device was significantly improved with passivation, the open-circuit voltage was up to 1.133 V, and the efficiency was up to 21.66%. Moreover, the stability of the optimized device was significantly improved. After 97 days of storage in nitrogen, the efficiency maintained 90% of the initial efficiency.

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perovskite solar cells / interfacial energy / 2-mercaptopyrimidine / Lewis acids and bases

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Du Lin, Peng Changtao, Tang Yu, Jiang Yutong, Shu Hui, Huang Yuelong. INTERFACIAL PASSIVATION FOR ENHANCED PERFORMANCE OF PEROVSKITE SOLAR CELLS VIA BY 2-MERCAPTOPYRIMIDINE[J]. Acta Energiae Solaris Sinica. 2022, 43(9): 73-77 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0267

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