Coordination modulated crystallization and defect passivation in high quality perovskite film for efficient solar cells

Xiaoyu DENG, Zhiyuan CAO, Yuan YUAN, Mason Oliver Lam CHEE, Lisha XIE, Aili WANG, Yong XIANG, Tingshuai LI*, Pei DONG, Liming DING, Feng HAO

*Corresponding author for this work

Research output: Journal PublicationsReview articleOther Review

55 Citations (Scopus)

Abstract

Hybrid perovskite solar cells (PSCs) have come into prominence as a potential alternative to crystalline silicon solar cells due to their outstanding photovoltaic performance and the simple manufacturing process. Over the past few years, the performance has greatly benefited from the emergence of advanced fabrication technologies capable of producing high quality perovskite films. The transforming process from precursor to perovskite film directly influences the film quality by controlling the nucleation and crystal growth. In particular, the coordination of electron-rich atoms in solvent or additives with Pb ions in perovskite precursor has been widely used to modulate the crystal growth to obtain compact and dense perovskite film with fewer defects. Here, a systematic review is presented to describe the effect of coordination interaction on perovskite crystallization process, defects passivation, hysteresis behavior and long-term stability for efficient perovskite thin film and related photovoltaics. Functional additives with carbonyl-, acyl- and cyano- group bearing lone electron pairs have been widely adopted to coordinate with PbI2 to retard crystallization and obtain a high-quality perovskite film. Meanwhile, these additives can modify the surface or grain boundary of as-formed perovskite film to passivate defects, mitigate hysteresis and prevent the moisture permeation to prolong the device lifetime. The coordination interaction provides a feasible strategy to improve the perovskite film quality, which is crucial to increase the efficiency and longevity of PSCs and other related optoelectronic devices towards future upscaling and commercialization.

Original languageEnglish
Article number213408
Number of pages17
JournalCoordination Chemistry Reviews
Volume420
Early online date9 Jun 2020
DOIs
Publication statusPublished - 1 Oct 2020
Externally publishedYes

Bibliographical note

This work was financially supported by the National Natural Science Foundation of China NSFC (51702038) and the Recruitment Program for Young Professionals. P. Dong acknowledges George Mason University for startup support. L. Ding thanks the National Key Research and Development Program of China (2017YFA0206600) and the National Natural Science Foundation of China (51773045, 21772030, 51922032, 21961160720) for financial support.

Keywords

  • Additives
  • Crystallization
  • Defects
  • Hysteresis
  • Solvents

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