Work

Blast Nucleation Suppressed Growth of Large-Sized High-Quality CsPbBr3 Single Crystals for Photodetector Applications

Year: 2025

Type: article

Abstract: During the growth of lead halide perovskite single crystals (SCs) with the conventional inverse temperature crystallization (ITC) method, the blast nucleation of the precursor under supersaturation conditions is always unavoidable. In the current study, three kinds of additives namely methanol (MOE), ethyl alcohol (EtOH), and polyethylene glycol (PEG) are introduced to regulate the growth of CsPbBr3 SCs. Benefiting from the strong anchoring hydroxy groups (-OH) with the Pb2+ species, large-sized CsPbBr3 crystals with reduced defect densities were prepared (PEG-regulated). In addition, the viscosity of the precursor solution increases after adding PEG additive, which provides a more stabilized environment for crystal growth. Finally, the photodetectors prepared from our PEG-tuned CsPbBr3 SCs show a responsivity of 2.25 A/W and a detectivity of 6.06 × 1011 Jones, demonstrating the potential of CsPbBr3 SCs for photo-detecting applications.

Source: Molecules

DOI: 10.3390/molecules30224423

Authors: Xinyu Sun, Yuxia Yin, Xiaolin Xia, Teng Zhang

Institutions: China University of Petroleum, East China, Qingdao Institute of Technology

Language: English

Topic: Perovskite Materials and Applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,258

Funders: National Natural Science Foundation of China, Fundamental Research Funds for the Central Universities