Temperature-dependent photoluminescence properties of water-soluble CuInS2 and CuInS2/ZnS quantum dots

Iida, Kazutaka; Kim, DaeGwi

doi:10.1063/5.0105290

Cited by 5 publications

(4 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The HCCN nanosheets exhibit a similar PL quenching trend compared to PCN while the temperature increases. With the increasing of temperature, the decrease in PL intensities is primarily attributed to thermally activated non-radiative recombination processes, and the decrease is quantitatively analyzed by the following equation [25,35]:…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, we speculate that the decrease in PL lifetime is mainly due to the thermal activation of non-radiative recombination, and thus the change tendency of PL intensity and PL lifetime with increasing temperature is similar. Furthermore, the temperature dependence of PL lifetimes was fitted using equation (4), incorporating the effect of thermally-induced non-radiative recombination processes [35]:…”

Section: Levels Of the Valence Bands (Vb) And Conduction Bands (Cb)mentioning

confidence: 99%

See 1 more Smart Citation

Temperature-dependent excitonic emission characteristics of highly crystallized carbon nitride nanosheets

Wang,

Zhang,

Zhao

et al. 2024

Nanotechnology

View full text Add to dashboard Cite

Highly-crystallized carbon nitride (HCCN) nanosheets exhibit significant potential for advancements in the field of photoelectric conversion. However, to fully exploit their potential, a thorough understanding of fundamental excitonic photophysical processes is crucial. Here, the temperature-dependent excitonic photoluminescence (PL) of HCCN nanosheets and amorphous polymeric carbon nitride (PCN) is investigated using steady-state and time-resolved PL spectroscopy. The exciton binding energy of HCCN is determined to be 109.26 meV, lower than that of PCN (207.39 meV), which is attributed to the ordered stacking structure of HCCN with a weaker Coulomb interaction between electrons and holes. As the temperature increases, a noticeable reduction in PL lifetime is observed on both the HCCN and PCN, which is ascribed to the thermal activation of carrier trapping by the enhanced electron-phonon coupling effect. The thermal activation energy of HCCN is determined to be 102.9 meV, close to the value of PCN, due to their same band structures. Through wavelength-dependent PL dynamics analysis, we have identified the PL emission of HCCN as deriving from the transitions: σ*-LP, π*-π, and π*-LP, where the π*-LP transition dominants the emission because of the high excited state density of the LP state. These results demonstrate the impact of high-crystallinity on the excitonic emission of HCCN materials, thereby expanding their potential applications in the field of photoelectric conversion.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Levels Of the Valence Bands (Vb) And Conduction Bands (Cb)mentioning

confidence: 99%

Temperature-dependent excitonic emission characteristics of highly crystallized carbon nitride nanosheets

Wang,

Zhang,

Zhao

et al. 2024

Nanotechnology

View full text Add to dashboard Cite

show abstract

“…A general model to explain the thermal dependence of the emission of these systems has not been proposed yet, although several studies have investigated their temperature-dependent spectroscopic properties. [270][271][272][273] All in all, a survey of the large body of literature points to the possibility of using a combination of the effects described in this sub-section and in the previous ones on Boltzmann thermometry and energy transfer mechanisms to describe on a case-by-case basis the temperature dependence of the optical features of SNCs.…”

Section: Semiconductors Nanocrystalsmentioning

confidence: 99%

Spotlight on Luminescence Thermometry: Basics, Challenges, and Cutting‐Edge Applications

et al. 2023

View full text Add to dashboard Cite

Luminescence (nano)thermometry is a remote sensing technique that relies on the temperature dependency of the luminescence features (e.g., bandshape, peak energy or intensity, and excited state lifetimes and risetimes) of a phosphor to measure temperature. This technique provides precise thermal readouts with superior spatial resolution in short acquisition times. Although luminescence thermometry is just starting to become a more mature subject, it exhibits enormous potential in several areas, e.g., optoelectronics, photonics, micro‐ and nanofluidics, and nanomedicine. This work reviews the latest trends in the field, including the establishment of a comprehensive theoretical background and standardized practices. The reliability, repeatability, and reproducibility of the technique are also discussed, along with the use of multiparametric analysis and artificial‐intelligence algorithms to enhance thermal readouts. In addition, examples are provided to underscore the challenges that luminescence thermometry faces, alongside the need for a continuous search and design of new materials, experimental techniques, and analysis procedures to improve the competitiveness, accessibility, and popularity of the technology

show abstract

“…Several studies discuss the impact of particle size and low temperatures on the optical characteristics of QDs [25][26][27]. However, the correlation between particle size and temperature dependence remains inconclusive.…”

Section: Introductionmentioning

confidence: 99%

Temperature- and Size-Dependent Photoluminescence of CuInS2 Quantum Dots

Korepanov,

Kozodaev,

Aleksandrova

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

We present the results of a temperature-dependent photoluminescence (PL) spectroscopy study on CuInS2 quantum dots (QDs). In order to elucidate the influence of QD size on PL temperature dependence, size-selective precipitation was used to obtain several nanoparticle fractions. Additionally, the nanoparticles’ morphology and chemical composition were studied using transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The obtained QDs showed luminescence in the visible–near infrared range. The PL energy, linewidth, and intensity were studied within an 11–300 K interval. For all fractions, a temperature decrease led to a shift in the emission maximum to higher energies and pronounced growth of the PL intensity down to 75–100 K. It was found that for large particle fractions, the PL intensity started to decrease, with temperature decreasing below 75 K, while the PL intensity of small nanoparticles remained stable.

show abstract

Temperature-dependent photoluminescence properties of water-soluble CuInS2 and CuInS2/ZnS quantum dots

Cited by 5 publications

References 37 publications

Temperature-dependent excitonic emission characteristics of highly crystallized carbon nitride nanosheets

Temperature-dependent excitonic emission characteristics of highly crystallized carbon nitride nanosheets

Spotlight on Luminescence Thermometry: Basics, Challenges, and Cutting‐Edge Applications

Temperature- and Size-Dependent Photoluminescence of CuInS2 Quantum Dots

Contact Info

Product

Resources

About