Water-assisted preparation of ethanol-dispersed CsPbBr3 perovskite nanocrystals and emissive gel

Zheng, Lingling; Jiang, Kunyang; Li, Xianli; Hong, Peibin; Chen, Keng; Zhang, Hao; Song, Yibing; Luo, Binbin

doi:10.1016/j.jcis.2021.04.017

Cited by 24 publications

(19 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All samples present a sharp absorption edge with a saturation at ∼507 nm, consistent with the characteristic absorption of CsPbBr 3 PNCs. 50 As for PNCs prepared with 0.12 mmol GA, the PL spectrum shows a symmetric peak with the center at ∼514 nm and a narrow full width at half-maximum (fwhm) of 16 nm, benefiting from the uniform size distribution and weak quantum confinement. Note that this synthesis is significantly different from that in our previous work, 50 in which the introduction of water and heterogeneous reaction deteriorate the optical properties and stability of the PNCs.…”

Section: ■ Results and Discussionmentioning

confidence: 98%

“…50 As for PNCs prepared with 0.12 mmol GA, the PL spectrum shows a symmetric peak with the center at ∼514 nm and a narrow full width at half-maximum (fwhm) of 16 nm, benefiting from the uniform size distribution and weak quantum confinement. Note that this synthesis is significantly different from that in our previous work, 50 in which the introduction of water and heterogeneous reaction deteriorate the optical properties and stability of the PNCs. Notably, increasing the reaction temperature is propitious to the enhancement of optical properties, while extending the time will result in the decrease of PL QY (Figure S3).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Weakening Ligand–Liquid Affinity to Suppress the Desorption of Surface-Passivated Ligands from Perovskite Nanocrystals

Zheng

Lian

et al. 2022

Langmuir

Self Cite

View full text Add to dashboard Cite

The interfacial migration of surface-bound ligands highly affects the colloidal stability and optical quality of semiconductor nanocrystals, of which the underlying mechanism is not fully understood. Herein, colloidal CsPbBr3 perovskite nanocrystals (PNCs) with fragile dynamic equilibrium of ligands are taken as the examples to reveal the important role of balancing ligand-solid/solvent affinity in suppressing the desorption of ligands. As a micellar surfactant, glycyrrhizic acid (GA) with bulky hydrophobic and hydrophilic groups exhibits a relatively smaller diffusion coefficient (∼440 μm2/s in methanol) and weaker ligand–liquid affinity than that of conventional alkyl amine and carboxy ligands. Consequently, hydrophilic GA-passivated PNCs (PNCs-GA) show excellent colloidal stability in various polar solvents with dielectric constant ranging from 2.2 to 32.6 and efficient photoluminescence with a quantum yield of 85.3%. Due to the suppressed desorption of GA, the morphological and optical properties of PNCs-GA are well maintained after five rounds purification and two months long-term storage. At last, hydrophilic PNCs-GA are successfully patterned through inkjet- and screen-printing technology. These findings offer deep insights into the interfacial chemistry of colloidal NCs and provide a universal strategy for preparing high-quality hydrophilic PNCs.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 98%

Section: ■ Results and Discussionmentioning

confidence: 99%

Weakening Ligand–Liquid Affinity to Suppress the Desorption of Surface-Passivated Ligands from Perovskite Nanocrystals

Zheng

Lian

et al. 2022

Langmuir

Self Cite

View full text Add to dashboard Cite

show abstract

“…Inspired by the unique band structure with antibonding nature and the excellent optoelectronic performance of lead halide perovskites in optoelectronic fields, − metal halide hybrids (MHHs) containing main-group metals with ns 2 lone pairs such as Sn 2+ , Sb 3+ , and Bi 3+ have been widely investigated to replace toxic Pb 2+ . − As an element in the same group of Pb, the poor antioxidative ability of Sn 2+ remains a great obstacle before commercialization . Bi-based MHHs possess good stability, while the low dimensionality of structural networks and their poor emission hinder their applications in photovoltaics (PVs) and light-emitting diodes (LEDs). , The strong stereoactivity and good chemical stability of Sb 3+ endow its MHH counterparts with remarkable photoluminescence (PL) properties, especially in zero-dimensional (0D) structural networks whose excitons can be self-trapped in an isolated unit and consequently facilitate the emission. − Sb-based or -doped MHHs with near-unity quantum efficiency, large Stokes shift, and broad emissive range from blue to near-infrared have been achieved in many cases, ,,− which are believed to be inseparable from 5s 2 lone pair-induced stereoactivity that results in strong excited-state structural deformation.…”

Section: Introductionmentioning

confidence: 99%

Guest-Induced Reversible Phase Transformation of Organic–Inorganic Phenylpiperazinium Antimony (III) Chlorides with Solvatochromic Photoluminescence

Peng

Xiao

et al. 2021

J. Phys. Chem. C

Self Cite

View full text Add to dashboard Cite

Antimony halide hybrids have been recently revealed to show reversible solvent-induced phase transformation along with solvatochromic photoluminescence (PL). However, the effects of guest molecules on such phase transformation are not yet well understood due to metastable solvent-induced phases. Here, we report the synthesis of 1-phenylpiperazinium (PhPi)-incorporated antimony chloride hybrids ((PhPi)2SbCl7·xH2O) with a guest H2O-mediated hydrogen bonding network. Upon removing H2O molecules through vacuum treatment or solvent induction, red-emissive (PhPi)2SbCl7·xH2O with a PL quantum yield (QY) of 32% is transformed into two yellow-emissive isomers (PhPi)2SbCl7-V (PL QY: 9%) or (PhPi)2SbCl7-S (PL QY: 95%), which can be reversibly transformed into (PhPi)2SbCl7·xH2O by placing in open air. Due to more compact and rigid structures that suppress octahedral distortion, smaller Stokes shifts are observed for both (PhPi)2SbCl7-V (1.41 eV) and (PhPi)2SbCl7-S (1.35 eV), consistent with density function theory calculations that (PhPi)2SbCl7·xH2O exhibits the largest distortion at excited states. Additionally, compared to poorly emissive (PhPi)2SbCl7-V, (PhPi)2SbCl7-S with near-unity QY is attributed to the Jahn–Teller-like deformation of excited states and a large thermal quenching barrier. Our findings highlight the role of guest molecules in tuning [SbCl6] octahedral distortion to enhance the luminescence efficiency of Sb-based halides.

show abstract

“…PEO, a hydrophilic material absorbing moisture due to its hydrogen bonding, is widely used as woven, biology, and engineering materials [ 56 , 57 , 58 ]. Perovskite and its compounds could be dissociated in water or other polar solvents [ 59 , 60 ]. Due to the environmental hydrone vapor absorbed by PEO, an increased content of PEO could dramatically reduce the PL intensity of PPC under the relative humidity (RH) of 50% ( Figure 2 e).…”

Section: Resultsmentioning

confidence: 99%

Modified Fabrication of Perovskite-Based Composites and Its Exploration in Printable Humidity Sensors

et al. 2022

View full text Add to dashboard Cite

Organic perovskites are promising optoelectronic semiconductor materials with photoelectric applications. It is known that the luminescence of perovskites is highly sensitive to hydron molecules due to its low moisture resistance of crystal structure, indicating its potential application on humidity-sensing. Herein, a novel perovskite-based compound (PBC) with minimal defects was developed to promote the photoluminescence performance via optimization of the drying method and precursor constitutions. Perovskite materials with good structural integrity and enhanced fluorescence performance up to four times were obtained from supercritical drying. Moreover, the hydrophilic polymer matrix, polyethylene oxide (PEO), was added to obtain a composite of perovskite/PEO (PPC), introducing enhanced humidity sensitivity and solution processibility. These perovskite/PEO composites also exhibited long-term stability and manifold cycles of sensitivity to humidity owing to perovskite encapsulation by PEO. In addition, this precursor solution of perovskite-based composites could be fancily processed by multiple methods, including printing and handwriting, which demonstrates the potential and broaden the applications in architecture decoration, logos, trademarks, and double encryption of anti-fake combined with humidity.

show abstract

Water-assisted preparation of ethanol-dispersed CsPbBr3 perovskite nanocrystals and emissive gel

Cited by 24 publications

References 41 publications

Weakening Ligand–Liquid Affinity to Suppress the Desorption of Surface-Passivated Ligands from Perovskite Nanocrystals

Weakening Ligand–Liquid Affinity to Suppress the Desorption of Surface-Passivated Ligands from Perovskite Nanocrystals

Guest-Induced Reversible Phase Transformation of Organic–Inorganic Phenylpiperazinium Antimony (III) Chlorides with Solvatochromic Photoluminescence

Modified Fabrication of Perovskite-Based Composites and Its Exploration in Printable Humidity Sensors

Contact Info

Product

Resources

About