Propylammonium iodide doping in enhanced stability and performance of FAPbI<sub>3</sub> perovskite for photovoltaics

化学工业与工程

Chemcial Industry and Engineering

2023, Vol. 40

Issue (2) :33-40 DOI: 10.13353/j.issn.1004.9533.20210365

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Propylammonium iodide doping in enhanced stability and performance of FAPbI₃ perovskite for photovoltaics

ZHANG Yue^1,2, XU Yanting^1,2, JIANG Kejian², ZHOU Xueqin¹

1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China;
2. Institute of Chemistry Chinese Academy of Sciences, Beijing 100190, China

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Abstract Hybrid perovskite FAPbI₃ is regarded as a promising absorber material for photovoltaic solar cells owing to its ideal bandgap and outstanding photoelectric properties. However, inherent phase instability of black perovskite (α-FAPbI₃) at room temperature remains a big obstacle for its application in photovoltaics. Herein, pure α-FAPbI₃ thin films were prepared in air atmosphere by doping propylammonium iodide (PAI) in FAPbI₃ precursor solution. It is found that the doping of PAI can inhibit the formation of the undesired δ-FAPbI₃, enhance the crystallinity and light absorbability, without widening the optical bandgap. Meanwhile, the photovoltaic performance and stability of the PAI-doped FAPbI₃ films are significantly improved. As a result, the device doped with 1.0% (molar fraction) PAI achieved the best photoelectric conversion efficiency (PCE) of 22.6%, PAI doping is an effective strategy to improve the photovoltaic performance and stability of α-FAPbI₃ perovskite cells.

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	ZHANG Yue
	XU Yanting
	JIANG Kejian
	ZHOU Xueqin

Keywords： perovskite doping stability photoelectric conversion efficiency functional material

Received 2021-05-11;

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ZHANG Yue, XU Yanting, JIANG Kejian, ZHOU Xueqin.Propylammonium iodide doping in enhanced stability and performance of FAPbI₃ perovskite for photovoltaics[J] Chemcial Industry and Engineering, 2023,V40(2): 33-40

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