Low-Threshold Lasing from 2D Homologous Organic–Inorganic Hybrid Ruddlesden–Popper Perovskite Single Crystals

TLDR

Two‑dimensional hybrid perovskites are of interest for optical and optoelectronic devices because their natural quantum‑well structure enables strong light–matter interactions. The study aims to grow millimeter‑sized single crystals of homologous 2D Ruddlesden–Popper perovskites (BA)₂(MA)ₙ₋₁PbnI₃ₙ₊₁ (n = 1–3) using a slow‑evaporation at constant temperature strategy. The crystals were synthesized by a slow‑evaporation at constant temperature (SECT) solution‑growth method. The resulting crystals exhibit excellent crystallinity, phase purity, spectral uniformity, and low‑threshold lasing at room temperature with tunable emission wavelengths, highlighting their potential as optical gain media.

Abstract

Organic–inorganic hybrid two-dimensional (2D) perovskites have recently attracted great attention in optical and optoelectronic applications due to their inherent natural quantum-well structure. We report the growth of high-quality millimeter-sized single crystals belonging to homologous two-dimensional (2D) hybrid organic–inorganic Ruddelsden–Popper perovskites (RPPs) of (BA)2(MA)n−1PbnI3n+1 (n = 1, 2, and 3) by a slow evaporation at a constant-temperature (SECT) solution-growth strategy. The as-grown 2D hybrid perovskite single crystals exhibit excellent crystallinity, phase purity, and spectral uniformity. Low-threshold lasing behaviors with different emission wavelengths at room temperature have been observed from the homologous 2D hybrid RPP single crystals. Our result demonstrates that solution-growth homologous organic–inorganic hybrid 2D perovskite single crystals open up a new window as a promising candidate for optical gain media.