Single-crystalline square microdisks of CH3NH3PbBr3 are prepared by using a one-step solution self-assembly method. Single-mode lasing at 557 nm is achieved based on built-in whispering gallery mode microresonator room temperature. By partial replacement Br with Cl, wavelengths continuously tuned from 525 to nm.

A facile and effective "liquid knife" is created by controlling the dewetting process of liquid precursor, yielding patterning single-crystalline perovskite microplates with uniform size, precise positioning, high quality, low lasing thresholds. The sizes location are controllable, leading to mode-tunable emission patterned lasers.

Abstract Organic emitters with persistent phosphorescence have shown potential application in optoelectronic devices. However, rational design and tuning are still challenging. Here, a series of metal-free luminophores without heavy atoms carbonyl groups from commercial/lab-synthesized carbazole benzene were synthesized to realize tunable molecular emission fluorescence by simply substituent variation. All the molecules emit blue both solution solid state. Upon removal excitation source,...

Abstract Organic heterostructures (OHSs) integrating the intrinsic heterostructure characters as well organic semiconductor properties have attracted intensive attention in material chemistry. However, precise bottom-up synthesis of OHSs is still challenging owing to general occurrence homogeneous-nucleation and difficult manipulation noncovalent interactions. Herein, we present rational longitudinally/horizontally-epitaxial growth one-dimensional including triblock core/shell nanowires with...

Harvesting the narrow bandgap excitons of charge-transfer (CT) complexes for achievement near-infrared (NIR) emission has attracted intensive attention its fundamental importance and practical application. Herein, triphenylene (TP)-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4 TCNQ) CT organic complex is designed fabricated via supramolecular self-assembly process, which demonstrates NIR with a maximum peak 770 nm photoluminescence quantum yield (PLQY) 5.4%. The segregated...

A description of the structure and bonding novel bis(μ-oxo)dicopper complexes their bis(μ-hydroxo)dicopper decomposition products was derived from combined X-ray crystallographic, spectroscopic, ab initio theoretical studies. The compounds [(LCu)2(μ-O)2]X2 were generated reaction solutions [LCu(CH3CN)]X with O2 at −80 °C (L = 1,4,7-tribenzyl-1,4,7-triazacyclononane, LBn3; 1,4,7-triisopropyl-1,4,7-triazacyclononane, LiPr3; or 1-benzyl-4,7-diisopropyl-1,4,7-triazacyclononane, LiPr2Bn; X...

Near-infrared (NIR) lasers are key components for applications, such as telecommunication, spectroscopy, display, and biomedical tissue imaging. Inorganic III-V semiconductor (GaAs) NIR have achieved great successes but require expensive sophisticated device fabrication techniques. Organic semiconductors exhibit chemically tunable optoelectronic properties together with self-assembling features that well suitable low-temperature solution processing. Major blocks in realizing organic lasing...

Anisotropic organic molecular construction and packing are crucial for the optoelectronic properties of crystals. Two-dimensional (2D) crystals with regular morphology good photon confinement potentially suitable a chip-scale planar photonics system. Herein, through bottom-up process, 2D halogen-bonded DPEpe-F4 DIB cocrystals were fabricated that exhibit an asymmetric optical waveguide optical-loss coefficients RBackward =0.0346 dB μm-1 RForward =0.0894 along [010] crystal direction, which...

Whispering-gallery-mode (WGM) resonators of semiconductor microdisks have been applied for achieving low-threshold and narrow-linewidth microlasers, but require sophisticated top-down processing technology. Organic single-crystalline hexagonal (HMDs) p-distyrylbenzene (DSB) self-assembled from solution can function as WGM microresonators with a cavity quality factor (Q) 210. Both multiple- single-mode lasing had achieved using DSB HMDs an edge length 4.3 1.2 μm, respectively. These organic...

Organic single-crystalline micro/nanostructures can effectively generate and carry photons due to their smooth morphologies, high photoluminescence quantum efficiency, minimized defects density therefore are potentially ideal building blocks for the optical circuits in next generation of miniaturized optoelectronics. However, tailor-made organic molecules be generally obtained by synthesis, ensuring that aggregate a specific form with desirable morphology act as efficient laser resonator...

We report a sequential epitaxial growth to prepare organic branched nanowire heterostructures (BNwHs) consisting of microribbon trunk 1,4-dimethoxy-2,5-di[4'-(cyano)styryl]benzene (COPV) with multiple branches 2,4,5-triphenylimidazole (TPI) in one-pot solution synthesis. The synthesis involves seeded-growth process, where COPV microribbons are grown first as followed by TPI at the pregrown surfaces. Selected area electron diffraction characterizations reveal that hydrogen-bonding...

Organic solid-state lasers (OSSLs) have been a topic of intensive investigations. Perylenediimide (PDI) derivatives are widely used in organic thin-film transistors and solar cells. However, OSSLs based on neat PDIs not achieved yet, owing to the formation H-aggregates excimer trap-states. Here, we demonstrated first PDI-based OSSL from whispering-gallery mode (WGM) hexagonal microdisk (hMD) microcavity N,N′-bis(1-ethylpropyl)-2,5,8,11-tetrakis(p-methyl-phenyl)-perylenediimide (mp-PDI)...

Abstract Organic single-crystal, one-dimensional materials can effectively carry charges and/or excitons due to their highly ordered molecule packing, minimized defects and eliminated grain boundaries. Controlling the alignment/position of organic single-crystal architectures would allow on-demand photon/electron transport, which is a prerequisite in waveguides other optoelectronic applications. Here we report guided physical vapour transport technique control growth, alignment positioning...

Abstract White‐light‐emissive organic micro/nanostructures hold exotic potential applications in full‐color displays, on‐chip wavelength‐division multiplexing, and backlights of portable display devices, but are rarely realized core/shell heterostructures. Herein, through regulating the noncovalent interactions between semiconductor molecules, a hierarchical self‐assembly approach horizontal epitaxial‐growth is demonstrated for fine synthesis core/mono‐shell microwires with multicolor...

Next-generation high-security cryptography and communication call for nondeterministic generation efficient authentication of unclonable bit sequences. Physical functions using inherent randomness in material device fabrication process have emerged as promising candidates realizing one-way cryptographic systems that avoid duplication attacks. However, previous approaches suffer from the tradeoffs between low-efficiency complicated authentication. Here, all-photonic primitives by solution...

Abstract Near‐infrared (NIR) organic solid‐state lasers play an essential role in applications ranging from laser communication to infrared night vision, but progress this area is restricted by the lack of effective excited‐state gain processes. Herein, we originally proposed and demonstrated cascaded occurrence intramolecular proton transfer for constructing completely new energy‐level systems. Cascading first ultrafast <430 fs subsequent irreversible second ca. 1.6 ps, stepwise process...

Abstract Optical waveguide of organic micro/nanocrystals is one crucial elements in miniaturized integrated photonics. One-dimensional (1D) crystals with various optical features have attracted increasing interests towards promising photonic devices, such as multichannel signal converter, field-effect waveguide, sensitive detector, and logic gate. Therefore, a summary about the 1D based important for rational design fabrication novel devices optoelectronics applications. Herein, recent...

Excited state intramolecular proton transfer (ESIPT) molecules are considered to be natural born laser materials because of their intrinsic four-level system. Organic lasers based on ESIPT materials, especially recently developed micro/nanolasers, have been drawing great attention in the past few decades due unique photophysical properties, such as ultralow threshold and high-quality value, well near-infrared (NIR) wavelength tunable emission. These properties facilitate widespread...

Abstract Rationally designing and precisely constructing the dimensions, configurations compositions of organic nanomaterials are key issues in material chemistry. Nevertheless, precise synthesis heterostructure remains challenging owing to difficulty manipulating homogeneous/heterogeneous-nucleation process complex epitaxial relationships combinations dissimilar materials. Herein, we propose a hierarchical epitaxial-growth approach with combination longitudinal horizontal modes for design...

Organic heterostructure nanowires, such as multiblock, core/shell, branch-like and related compounds, have attracted chemists' extensive attention because of their novel physicochemical properties. However, owing to the difficulty in solving lattice mismatch distinct molecules, construction organic heterostructures at large scale remains challenging, which restricts its wide use future applications. In this work, we define a concept lattice-mismatch-free for hierarchical self-assembly...