Efficient second-order nonlinear response and upconversion emission from a wide-bandgap quasi-1D lead bromide perovskite

Abstract

Low-dimensional hybrid organic-inorganic perovskites (HOIPs) have attracted significant attention for applications such as solar cells, light-emitting diodes, and photodetectors. Compared with their three-dimensional counterparts, low-dimensional perovskites (LDPs) exhibit prominent characteristics...

Linear optical afterglow and nonlinear optical harmonic generation from chiral tin(iv) halides: the role of lattice distortions

“…The polarization ratio, r = (I max À I min )/(I max + I min ), is calculated to be 95.56% for p-analyser, suggesting a high polarization nature of the SHG signal. 100 The pump fluence-dependent SHG spectra of S-Cl have also been registered. Upon excitation at the optimal wavelength (980 nm), the power-intensity function unveils the slope on a logarithmic scale to be B1.90 (Fig.…”

“…The polarization ratio, ρ = ( I max − I min )/( I max + I min ), is calculated to be 95.56% for p -analyser, suggesting a high polarization nature of the SHG signal. 100…”

Strong anisotropic second-order nonlinear optical responses in 0D lead-free chiral perovskite single-crystalline microwire arrays

“…This value is larger than those of most of the similar organic-inorganic hybrid perovskites reported recently, demonstrating its potential applications in the field of infrared nonlinear optics (Table S4 †). 27,28,31 Then we studied the second-order NLO properties of the as-fabricated chiral perovs-kite single-crystalline microwire arrays in detail utilizing a homebuilt femtosecond laser setup (Fig. S16 †).…”

“…[20][21][22][23][24] Compared to their three-dimensional counterparts, lowdimensional perovskite materials ranging from two, one, to zero dimensions (0D) exhibit a more pronounced NLO responses due to the light-matter interaction, various excitonic effects, structural diversity, and large lattice distortions. [25][26][27][28][29][30][31][32] Meanwhile, the large bandgap of these low-dimensional perovskites leads to their transparency over a broader spectral range, providing a wide wavelength window for SHG applications. 26,27 However, most low-dimensional chiral perovskites contain toxic Pb 2+ , seriously impeding their future commercialization and industrialization for NLO devices.…”

“…[25][26][27][28][29][30][31][32] Meanwhile, the large bandgap of these low-dimensional perovskites leads to their transparency over a broader spectral range, providing a wide wavelength window for SHG applications. 26,27 However, most low-dimensional chiral perovskites contain toxic Pb 2+ , seriously impeding their future commercialization and industrialization for NLO devices. The adjacent VA group cation Bi 3+ , which possesses a similar ionic radius and electronegativity but less toxicity compared to the toxic Pb 2+ , has been recently developed as an isoelectronic alternative to Pb 2+ .…”