Limits...
The phase transformation of CuInS2 from chalcopyrite to wurtzite.

Xie BB, Hu BB, Jiang LF, Li G, Du ZL - Nanoscale Res Lett (2015)

Bottom Line: In the present work, CuInS2 nanoparticles have been successfully synthesized by water-bath method with deionized water as solvent and thioglycolic acid as complexing agent at 80°C.The phase transition of CuInS2 from chalcopyrite to wurtzite was realized by adjusting the pH value of reaction solution.The emergence of Cu2S in the condition of higher pH value of reaction solution led to the formation of wurtzite CuInS2.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng, 475004 Henan People's Republic of China.

ABSTRACT
In the present work, CuInS2 nanoparticles have been successfully synthesized by water-bath method with deionized water as solvent and thioglycolic acid as complexing agent at 80°C. The phase transition of CuInS2 from chalcopyrite to wurtzite was realized by adjusting the pH value of reaction solution. The emergence of Cu2S in the condition of higher pH value of reaction solution led to the formation of wurtzite CuInS2. This facile method that controls the phase structure by adjusting the solution pH value could open a new way to synthesize other I-III-VI2 ternary semiconductor compounds.

No MeSH data available.


The UV-vis absorption spectrum of chalcopyrite and wurtzite CuInS2. The insets show the bandgaps of the CuInS2.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4385122&req=5

Fig6: The UV-vis absorption spectrum of chalcopyrite and wurtzite CuInS2. The insets show the bandgaps of the CuInS2.

Mentions: Figure 6 shows the UV-vis absorption spectrum of the as-prepared chalcopyrite and wurtzite CuInS2 measured at room temperature. Both the two phases of CuInS2 show a broad and strong absorption in the visible region. Compared with chalcopyrite CuInS2, the wurtzite CuInS2 showed a higher and broader absorption in the entire visible region and near-infrared region. The bandgap can be determined by plotting (αhν)2 versus hν (α = absorbance, h = Planck’s constant, and ν = frequency) [26,27]. As shown in the inset picture, the calculated optical bandgap for chalcopyrite and wurtzite CuInS2 is about 1.54 and 1.47 eV, respectively, which is close to the bulk energy bandgap of CuInS2.Figure 6


The phase transformation of CuInS2 from chalcopyrite to wurtzite.

Xie BB, Hu BB, Jiang LF, Li G, Du ZL - Nanoscale Res Lett (2015)

The UV-vis absorption spectrum of chalcopyrite and wurtzite CuInS2. The insets show the bandgaps of the CuInS2.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385122&req=5

Fig6: The UV-vis absorption spectrum of chalcopyrite and wurtzite CuInS2. The insets show the bandgaps of the CuInS2.
Mentions: Figure 6 shows the UV-vis absorption spectrum of the as-prepared chalcopyrite and wurtzite CuInS2 measured at room temperature. Both the two phases of CuInS2 show a broad and strong absorption in the visible region. Compared with chalcopyrite CuInS2, the wurtzite CuInS2 showed a higher and broader absorption in the entire visible region and near-infrared region. The bandgap can be determined by plotting (αhν)2 versus hν (α = absorbance, h = Planck’s constant, and ν = frequency) [26,27]. As shown in the inset picture, the calculated optical bandgap for chalcopyrite and wurtzite CuInS2 is about 1.54 and 1.47 eV, respectively, which is close to the bulk energy bandgap of CuInS2.Figure 6

Bottom Line: In the present work, CuInS2 nanoparticles have been successfully synthesized by water-bath method with deionized water as solvent and thioglycolic acid as complexing agent at 80°C.The phase transition of CuInS2 from chalcopyrite to wurtzite was realized by adjusting the pH value of reaction solution.The emergence of Cu2S in the condition of higher pH value of reaction solution led to the formation of wurtzite CuInS2.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng, 475004 Henan People's Republic of China.

ABSTRACT
In the present work, CuInS2 nanoparticles have been successfully synthesized by water-bath method with deionized water as solvent and thioglycolic acid as complexing agent at 80°C. The phase transition of CuInS2 from chalcopyrite to wurtzite was realized by adjusting the pH value of reaction solution. The emergence of Cu2S in the condition of higher pH value of reaction solution led to the formation of wurtzite CuInS2. This facile method that controls the phase structure by adjusting the solution pH value could open a new way to synthesize other I-III-VI2 ternary semiconductor compounds.

No MeSH data available.