Effects of high pressure and high temperature annealing on the characteristics of HPHT diamonds with high nitrogen content

Nie, Yuan; Li, Shangsheng; Hu, Qiang; Wang, JunZhuo; Hu, Meihua; Su, TaiChao; Guo-Feng, Huang; Li, ZhanChang; Li, Yong; Xiao, Hang

doi:10.1016/j.optmat.2023.113538

Cited by 3 publications

(2 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…10,11 Advanced techniques such as chemical vapor deposition (CVD) and high-pressure hightemperature (HPHT) methods circumvent the above-mentioned hindrances to a certain extent. 12,13 However, these techniques introduce additional complexities in maintaining a balance between crystal quality, defect concentration in different planes, 14 and fluorescence efficiency. 15 Hence, the synthesis of luminescent diamonds with uniform and reproducible optical characteristics remains a challenge.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, optimization of growth parameters, annealing cycles, and postsynthesis treatments is essential to ensure a desired level of fluorescence intensity. Synthesis processes for obtaining luminescent diamonds of above type require strict control for impurity incorporation during diamond growth, and the processes can be hindered by factors like surface roughness, nonuniform crystal growth, etc. , Advanced techniques such as chemical vapor deposition (CVD) and high-pressure high-temperature (HPHT) methods circumvent the above-mentioned hindrances to a certain extent. , However, these techniques introduce additional complexities in maintaining a balance between crystal quality, defect concentration in different planes, and fluorescence efficiency . Hence, the synthesis of luminescent diamonds with uniform and reproducible optical characteristics remains a challenge.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhancing Luminescence Properties of Lab-Grown Diamond Films with Upconversion Nanoparticles for High-Performance Surface Temperature Sensing in Advanced Applications

Babar,

Nuwad,

Agarwalla

et al. 2024

ACS Appl. Opt. Mater.

View full text Add to dashboard Cite

Lab-grown diamond films, vital for advanced electronics and biomedical applications, pose production challenges. This study investigates a simplified method to create fluorescent diamond films and assesses their potential as temperature sensors. Polycrystalline diamond (PCD) films functionalized with NaYF 4 :Er,Yb upconversion nanoparticles (UCNPs) have been developed, and their temperature sensitivity of luminescence has been evaluated. UCNPs functionalized on surface-treated PCD films (UCNPs−TPCD) exhibit superior temperature sensitivity (S r = 1.08% at 300 K −1 ) compared with the as-prepared UCNPs and UCNPs coated on the as-grown PCD films (UCNPs−PCD). Surface oxidation of PCD films facilitates uniform UCNP distribution, verified through upconversion luminescence, XPS, IR, and Raman spectroscopy alongside SEM and AFM. An increase in the temperature of the diamond lattice due to 980 nm laser irradiation leads to an increase in the population of the 2 H 11/2 level of Er 3+ and the associated increase in the fluorescence intensity ratio and improved temperature sensitivity of UCNPs functionalized on the treated diamond surface. Hysteresis in luminescence is observed for the first time in PCD films functionalized with UCNPs, attributed to an increased temperature from the absorption of 980 nm light by diamond films.

show abstract