Inch-sized high-quality perovskite single crystals by suppressing phase segregation for light-powered integrated circuits

Yucheng Liu, Yunxia Zhang, Xuejie Zhu, Zhou Yang, Weijun Ke, Jiangshan Feng, Xiaodong Ren, Kui Zhao, Ming Liu, Mercouri G. Kanatzidis, Shengzhong Liu

Research output: Contribution to journalArticlepeer-review

Abstract

The triple-cation mixed-halide perovskite (FAxMAyCs1-x-y)Pb(IzBr1-z)3 (FAMACs) is the best composition for thin-film solar cells. Unfortunately, there is no effective method to prepare large single crystals (SCs) for more advanced applications. Here, we report an effective additive strategy to grow 2-inch-sized high-quality FAMACs SCs. It is found that the judiciously selected reductant [formic acid (FAH)] effectively minimizes iodide oxidation and cation deprotonation responsible for phase segregation. Consequently, the FAMACs SC shows more than fivefold enhancement in carrier lifetimes, high charge mobility, long carrier diffusion distance, as well as superior uniformity and long-term stability, making it possible for us to design high-performance self-powered integrated circuit photodetector. The device exhibits large responsivity, high photoconductive gain, excellent detectivity, and fast response speed; all values are among the highest reported to date for planar-type single-crystalline perovskite photodetectors. Furthermore, an integrated imaging system is fabricated on the basis of 12 × 12 pixelated matrixes of the single-crystal photodetectors.

Original languageEnglish
Article numbereabc8844
JournalScience Advances
Volume7
Issue number7
DOIs
Publication statusPublished - Feb 10 2021

ASJC Scopus subject areas

  • General

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