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Research Article

Multifunctional dual-anion compensation of amphoteric glycine hydrochloride enabled highly stable perovskite solar cells with prolonged carrier lifetime

Lina Qin1,§, Mengfei Zhu1,§, Yuren Xia1,§, Xingkai Ma1, Daocheng Hong1, Yuxi Tian1, Zuoxiu Tie1,2,3( ), Zhong Jin1,2,3( )
State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
Nanjing Tieming Energy Technology Co. Ltd., Nanjing 210093, China
Suzhou Tierui New Energy Technology Co. Ltd., Suzhou 215228, China

§ Lina Qin, Mengfei Zhu, and Yuren Xia contributed equally to this work.

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Graphical Abstract

In this work, we introduced glycine hydrochloride (GlyHCl) as an additive for FA0.9MA0.1PbI3−x%-GlyHCl perovskite material. The Cl− ion in GlyHCl facilitate α-phase perovskite formation, while the –COO− group bridges with Pb2+ cations, addressing anion vacancies and enhancing absorption intensity.

Abstract

Throughout years, the two-step spin-coating process is the most common method to prepare organic lead halide perovskite materials. However, the short reaction time of dropping the solution at the second step means that PbI2 cannot be completely transformed into perovskite phase. To solve this problem, we report the introduction of glycine hydrochloride (GlyHCl) into the second step of the two-step spin-coating process to prepare a FA0.9MA0.1PbI3-x%-GlyHCl perovskite material (namely FAMA-x%-GlyHCl, where FA = formamidinium, MA = methylammonium, and x% stands for the molar ratio of GlyHCl added in FA iodide/MA iodide (FAI/MAI) precursor solution). The Cl− ion in GlyHCl assists the formation of α-phase perovskite, and the –COO− group coordinates with Pb2+ cation in a bridging way, making up for the anion vacancy in perovskite lattice and resulting in high absorption intensity. The perovskite solar cells (PSCs) based on FAMA-9%-GlyHCl achieve a long carrier lifetime (527.0 ns), a photoelectric conversion efficiency (PCE) of 19.40% and good thermal stability, maintaining 85.8% of the initial PCE after being continuously heated at 60 °C for 500 h. This study helps to solve the problem of incomplete reaction in the two-step spin-coating process and puts forward a new solution for preparing high coverage perovskite films with large grain size.

Keywords

dual-anion compensationglycine hydrochlorideperovskite solar cellscarrier lifetimethermal and moisture stability

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Nano Research
Volume 17 Issue 6,
June 2024
Pages 5131-5137
DOI: 10.1007/s12274-024-6428-5
Cite this article:
Qin L, Zhu M, Xia Y, et al. Multifunctional dual-anion compensation of amphoteric glycine hydrochloride enabled highly stable perovskite solar cells with prolonged carrier lifetime. Nano Research, 2024, 17(6): 5131-5137. https://doi.org/10.1007/s12274-024-6428-5
Topics:
Perovskite solar cells

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Received: 06 October 2023
Revised: 18 December 2023
Accepted: 18 December 2023
Published: 23 January 2024
© Tsinghua University Press 2024
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