Unprecedented random lasing in 2D organolead halide single-crystalline perovskite microrods

Abstract

Three-dimensional organic-inorganic hybrid halide perovskites have been demonstrated as a great material for applications in optoelectronics and photonics. However, their inherent instabilities over moisture, light, and heat may hinder their...

Directional and Polarized Lasing Action on Pb‐free FASnI3 Integrated in Flexible Optical Waveguides

“…A Fast Fourier Transform procedure carried out with these spectra, Figure S6c-d (Supporting Information), indicates average cavity lengths in the range L c ≈231-244 µm, which is consistent with that found for CsSnI 3 [26] or MAPbI 3 thin films. [41] The benefit of our WG structure is given by such very low ASE/lasing thresholds (100/300 nJ cm −2 ), which are smaller than the RL reported for films of CsSnI 3 (18 mJ cm −2 ), [26] MAPbBr 3 (800 µJ cm −2 ), [42] MAPbI 3 (30-150 µJ cm −2 ), [41,43] CsPbBr 3 quantum dots (40 µJ cm −2 ) [44] and tin-based Ruddelsden−Popper perovskites (0.5-3 µJ cm −2 ), [45,46] all pumped under surface/backscattering excitation.…”

“…For example, a typical RL threshold of ≈1 mJ cm −2 is usually reported for dyes [13,15] or colloidal quantum dots, [60,62] in both cases prepared as thin films on rigid substrates. In the case of LPs, the threshold of RL is reduced down to 1-10 µJ cm −2 in the case of thin films deposited on rigid substrates, [41,42,44,45,63,64] but it increases up to 0.1-1 mJ cm −2 for similar films on flexible ones (polyimide, Ni foam). [40,65] Moreover, a threshold as high as 10 mJ cm −2 was reported for a tin-perovskite deposited on (rigid) mica.…”

Mixed-halide copper-based perovskite R2Cu(Cl/Br)4 with different organic cations for reversible thermochromism

“…Hybrid perovskites with two-dimensionality (2D) have made considerable advances as optoelectronic materials for photovoltaic, 1,2 X-ray detection, [3][4][5][6][7][8] light-emitting, [9][10][11][12][13][14][15] spintronic, 16,17 photodetection, [18][19][20][21][22][23] lasing, [24][25][26][27][28][29] and other applications. [30][31][32][33][34] Due to their high chemical stability and photostability and the facile diversity of their organic and inorganic cations, halide anions, and metal cations, 2D-perovskites have emerged as an ideal platform for novel functional semiconductors.…”

Extended air, light, and heat-resistive organolead halide perovskite single-crystalline microrods for high-performance photodetectors

“…The millimeter-sized single-crystalline FA-(NMPDA)PbBr 4 microrods reveal low threshold (∼0.5 μJ cm −2 ) random lasing behaviors with a sharp laser having linewidth (∼0.1 nm) and a high-quality factor (∼5350) at room temperature. 22 The FA was incorporated into the 2D perovskite lattice to form the quasi-2D perovskite-like structure and enhance the stability. The FA-(NMPDA)PbBr 4 single-crystalline microrods showed excellent stability for more than 2 hours against laser irradiation.…”

“…The FA-(NMPDA)PbBr 4 single-crystalline microrods showed excellent stability for more than 2 hours against laser irradiation. 22…”