Abstract Ionic liquid salts (ILs) are generally recognized as additives in perovskite precursor solutions to enhance the efficiency and stability of solar cells. However, success ILs incorporation is highly dependent on formulation crystallization process, posing challenges for industrial‐scale implementation. In this study, a room‐temperature spin‐coated IL, n‐butylamine acetate (BAAc), identified an ideal passivation agent formamidinium lead iodide (FAPbI 3 ) films. Compared with other...

Complexes [Pt(moppy)(PPh2Py)Cl] (1), [Pt(moppy)(PPh2Py)]PF6 (2) and [Pt2(moppy)2(CH3CN)2Ag(m‐PPh2Py)2](PF6)3 (3) have been synthesized through choosing suitable experimental condition to modulate the coordination mode of PPh2Py. Crystal structures indicate that 1 2 show distinct mononuclear structures, complex 3 is a [Pt‐Ag‐Pt] cluster. In CH2Cl2–H2O mixed solvent, complexes can be interconverted upon alternately adding AgPF6 NaCl. Complex dissociate into in solution. These reveal different...

To well understand luminescence modulation of Pt(II) complexes by inter‐molecular interactions, three platinum [Pt(moppy)Cl(L)] have been synthesized (Scheme 1) through incorporating the same C^N ligand moppyH = 2‐(4‐methoxyphenyl)pyridine, while different auxillary ligands L: SEt2 in 1, iccy isocyanocyclohexane 2, and icna isocyanonaphthalene 3. Crystal structures indicate that neighbouring molecules are connected π⋅⋅⋅π forming supramolecular dimer both 1 chain structure In a CH3CN‐H2O...

The molecular aggregates of complex [Ir(ppy) 2 (mbpymbh)]PF 6 (1) show unexpected photo-induced oxidative cyclization and related luminescence switching.

We experimentally demonstrate cavity phase matching for the first time using a sheet optical parametric oscillator which is made of an x-cut KTiOPO(4) crystal sheet. This microcavity presents 220 kW peak power capability near-frequency-degenerate outputs with up to 23.8% slope efficiency. It also features unique spectral characteristics such as single-longitudinal-mode and narrow linewidth. These attractive properties predict broad applications mini-device, terahertz generation, photonic...

In this Letter, we demonstrate a nonlinear-mirror (NLM) mode-locked diode-pumped solid-state Nd:YVO4 laser operating at 1342 nm, in which the NLM comprises periodically poled LiNbO3 crystal and dichroic mirror. The self-starting threshold for cw mode locking is 1.5 W, significantly lower than that of saturable absorber locking. An average power 1.52 W nm obtained under diode pump 10 808 with slope efficiency being up to 16.8%. pulse width repetition rate output are about 9.5 ps 101 MHz, respectively.

We report a diode-pumped intracavity second-harmonic generation mode-locked solid-state Tm:YAP laser operating at 1988 nm using periodically poled congruent LiNbO3 as the nonlinear crystal. The threshold of continuous wave mode locking is 11.6 W. maximum output power 1.67 W, while shortest pulse obtained 4.7 ps repetition rate 97.09 MHz.

We report an efficiency-enhanced mid-infrared generation via optical parametric down conversion. A tandem periodically-poled MgO-doped stoichiometric lithium tantalate crystal is used to realize on-chip and amplification of radiation inside oscillator cavity. achieved 21.2% conversion efficiency (24% slope efficiency), which among the highest efficiencies for pump-to-mid-infrared conversion, with 1064 nm Nd class laser pump. The maximum average output power at 3.87 μm reached 635 mW a 3.0 W

Simultaneous optical parametric oscillation and intracavity second-harmonic generation based on a hexagonally poled lithium tantalate is reported. Both the cascaded noncollinear second-order harmonic processes reach high efficiency. A variety of possible self-doubling indicate this has potential applications as compact multi-wavelength light source.

We demonstrate a compact all-solid-state yellow laser source based on Q-switched dual-wavelength Nd:YAG and periodically-poled LiTaO(3) crystal. 589-nm light was generated by single-pass sum-frequency generation of the fundamental IR waves at 1064 1319 nm. The maximum output power 506 mW corresponding conversion efficiency approximately 5.5% [W(-1)cm(-1)].

We propose a universal and practical scheme to realize polarization-free second-order nonlinear frequency-conversion processes, including sum-frequency generation, difference-frequency optical parametric amplification. This is based on the superlattice with noncritical phase-matching condition, which suitable for integration. A chirped dual-period structure proposed ensure efficiency stability of conversions.

MgO-doped congruent Lithium Niobate (MgO:CLN) is widely used in a variety of nonlinear optical processes, while its Sellmeier equation has only been derived from experiments under 200oC. Here we extend the temperature range for study to as wide 60 oC 510 oC. This work important operation MgO:CLN crystal.

1W quasi-white-light source has been generated from a single lithium tantalate with cascaded domain modulation. The is combined by proper proportion of the red, green and blue laser light. red result compact self-sum frequency optical parametric oscillation when pumped laser. efficiency pump reaches 27%. This design can be employed not only as stable powerful RGB light but also an effective generator.

We propose in this paper a chirped-quasi-periodic structure using the projection method. This type of new combines advantages chirped and quasi-periodic structures, can be used for both multiple quasi-phase-matching bandwidths control. Numerical simulation second-harmonic generation performance is good agreement with Fourier spectrum structure.

Since cavity-phase matching has been experimentally realized, the efficiency is limited to 20%. In this Letter, we successfully achieved a conversion as high 41% with slope of 48.5% using matching, by reflecting pump beam at end surface KTiOPO(4) crystal. The performance device makes it promising candidate substitute for quasi-phase-matching material.

In this article we develop a method to evaluate the poling quality of optical superlattice (OSL) based on two-dimensional (2D) Fourier transform. To demonstrate method, -Z or +Z face etched OSL samples with desired patterns are fabricated by standard electric field technique. By analyzing processed micrograph surfaces, magnitude reciprocal vectors calculated directly and rapidly. Second harmonic generation (SHG) experiment is performed validate evaluation result.

Cavity phase matching has been recently demonstrated as a phase-matching method for efficient nonlinear frequency conversion in microcavity. Here we extend it to the Type I configuration using sub-coherent-length optical parametric oscillator consisting of an MgO-doped lithium niobate crystal sheet. It generates tunable single-longitudinal-mode twin beam, which covers cesium D2 line 852.1 nm and extended band communication. This microcavity is capable peak output power 58 kW with maximum...

Abstract Introducing various absorption materials to the IGZO thin film transistor (TFT) forms new device approach for making high performance photodetectors and image sensors. In this study, a 30 μm × phototransistor with quasi-2D perovskite layer is demonstrated, which attains responsivity reaching 1.5 10 5 A W −1 well detectivity of 3.07 14 Jones under 87.4 nW cm −2 illumination at 520nm. This combines merits low turn-off dark current TFT optoelectronic properties photo layer, very...

The development of machine vision demands accurate image capture under different lighting conditions, which is crucial for perceiving the environment correctly. In this paper, we present a human-eye-inspired sensor based on quasi-two-dimensional perovskite and indium gallium zinc oxide phototransistor array. exhibits light detection limit as low 6.1 nW/cm2 with responsivity 5 × 105 A/W, capable in visible spectrum range. It demonstrates adaptation both dim illuminated enhancing contrast...

We have achieved broadband parametric generation by using a quasi-periodically poled LiTaO(3) crystal as frequency converter. Tuning wavelength rang from 0.609 microm to 5.208 microm, which covered three quasi-phase-matching processes, was obtained means of changing the pump 0.530 1.184 microm. The experiment results are in good agreement with theory. maximum conversion efficiency is 62% 10 Hz-5 ns source, at average power 0.5 mW. Our exhibit possible application quasi-periodic superlattice...