Ligand assisted growth of perovskite single crystals with low defect density

Ye Liu, Xiaopeng Zheng, Yanjun Fang, Ying Zhou, Zhenyi Ni, Xun Xiao, Shangshang Chen and Jinsong Huang ()
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Ye Liu: University of North Carolina
Xiaopeng Zheng: University of Nebraska-Lincoln
Yanjun Fang: University of Nebraska-Lincoln
Ying Zhou: University of North Carolina
Zhenyi Ni: University of North Carolina
Xun Xiao: University of North Carolina
Shangshang Chen: University of North Carolina
Jinsong Huang: University of North Carolina

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract A low defect density in metal halide perovskite single crystals is critical to achieve high performance optoelectronic devices. Here we show the reduction of defect density in perovskite single crystals grown by a ligand-assisted solution process with 3‐(decyldimethylammonio)‐propane‐sulfonate inner salt (DPSI) as an additive. DPSI ligands anchoring with lead ions on perovskite crystal surfaces not only suppress nucleation in solution, but also regulate the addition of proper ions to the growing surface, which greatly enhances the crystal quality. The grown CH3NH3PbI3 crystals show better crystallinity and a 23-fold smaller trap density of 7 × 1010 cm−3 than the optimized control crystals. The enhanced material properties result in significantly suppressed ion migration and superior X-ray detection sensitivity of CH3NH3PbI3 detectors of (2.6 ± 0.4) × 106 µC Gy−1air cm−2 for 60 kVp X-ray and the lowest detectable dose rate reaches (5.0 ± 0.7) nGy s−1, which enables reduced radiation dose to patients in medical X-ray diagnostics.

Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-21934-6

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DOI: 10.1038/s41467-021-21934-6

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