Experimental research on temperature field distributions for optical lenses irradiated by femtosecond laser

Tang, Enling; Lin, Xiaochu; Gao, Guowen; Han, Yafei; Liu, He; Xu, Yuzhi; Liu, Shuhua; Wang, Meng; Shen, Xiang; X, Jin; Guo, Kai

doi:10.1016/j.optlastec.2018.04.014

Cited by 3 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The following electron–phonon scattering process to reach an equilibrium temperature of the electron and phonon system induces an ultrafast phonon heating process (for 28 mJ cm −2 laser fluence, the maximum temperature rise is 22.6 K) with a heating rate of >10 13 K s −1 in hundreds of femtoseconds (see the Supplementary material for theoretical analysis of temperature rise by PiP) and an ultrafast thermal gradient with the Gaussian distribution is generated in the focus zone ( Supplementary Fig. S1a ) [ 24 ]. On the way to cooling the excited system, atoms obtain excessive kinetic energy to align into an ordered arrangement, thus passivating the bulk defects of the SnO 2 and improving the crystallinity of the SnO 2 [ 21 , 25 ].…”

Section: Resultsmentioning

confidence: 99%

Photoexcitation-induced passivation of SnO2 thin film for efficient perovskite solar cells

Chai,

Chen,

Zeng

et al. 2023

National Science Review

View full text Add to dashboard Cite

A high-quality tin oxide electron transport layer (ETL) is a key common factor to achieve high-performance perovskite solar cells (PSCs). However, the conventional annealing technique to prepare high-quality ETLs by continuous heating under near-equilibrium conditions requires high temperatures and a long fabrication time. Alternatively, we present a non-equilibrium, photoexcitation-induced passivation technique that uses multiple ultrashort laser pulses. The ultrafast photoexcitation and following electron–electron and electron–phonon scattering processes induce ultrafast annealing to efficiently passivate surface and bulk defects, and improve the crystallinity of SnO2, resulting in suppressing the carrier recombination and facilitating the charge transport between the ETL and perovskite interface. By rapidly scanning the laser beam, the annealing time is reduced to several minutes, which is much more efficient compared with conventional thermal annealing. To demonstrate the university and scalability of this technique, typical antisolvent and antisolvent-free processed hybrid organic–inorganic metal halide PSCs have been fabricated and achieved the power conversion efficiency (PCE) of 24.14% and 22.75% respectively, and a 12-square-centimeter module antisolvent-free processed perovskite solar module achieves a PCE of 20.26%, with significantly enhanced performance both in PCE and stability. This study establishes a new approach towards the commercialization of efficient low-temperature manufacturing of PSCs.

show abstract

Section: Resultsmentioning

confidence: 99%

Photoexcitation-induced passivation of SnO2 thin film for efficient perovskite solar cells

Chai,

Chen,

Zeng

et al. 2023

National Science Review

View full text Add to dashboard Cite

show abstract

Research on high-temperature mechanical behaviour of carbon/phenolic composites under ultra-high heating rates

Lin,

Yi,

Xie

et al. 2024

Polymer Testing

View full text Add to dashboard Cite

Ambient temperature effect on the imaging quality of an aspherical airborne camera: theoretical and experimental analysis

Tian

Lin

et al. 2021

Appl. Opt.

View full text Add to dashboard Cite

The ambient temperature is one of the important factors that affects the imaging quality of aspherical airborne camera. In order to evaluate the imaging quality of an airborne camera under the effect of ambient temperature and predict the influence of the ambient temperature on the modulation transfer function (MTF) of the airborne camera, on the basis of the imaging principle and the material properties of lenses of the airborne camera, this study integrates theoretical analysis, simulation analysis, and experimental tests to study the influence of ambient temperature on the imaging performance of airborne cameras. The imaging performance of an airborne camera is characterized by using the MTF. First, a mathematical model is presented to analyze the effect of ambient temperature on the MTF of the airborne camera. Then the simulation analysis and experiment tests are, respectively, proposed. The results of the mathematical model are compared, respectively, with the results of the simulation analysis and experimental test, and the comparison shows that the variation trends of the mathematical model results are in line with the simulation results and the experimental results, respectively. Therefore, the mathematical model presented in this study is effective for analyzing the influence of ambient temperature variation on the MTF of airborne cameras.

show abstract

Experimental research on temperature field distributions for optical lenses irradiated by femtosecond laser

Cited by 3 publications

References 5 publications

Photoexcitation-induced passivation of SnO2 thin film for efficient perovskite solar cells

Photoexcitation-induced passivation of SnO2 thin film for efficient perovskite solar cells

Research on high-temperature mechanical behaviour of carbon/phenolic composites under ultra-high heating rates

Ambient temperature effect on the imaging quality of an aspherical airborne camera: theoretical and experimental analysis

Contact Info

Product

Resources

About