کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1642635 | 1517238 | 2015 | 4 صفحه PDF | دانلود رایگان |
• CZTSSe nanocrystals are synthesized by a facile two-step process.
• It involves a solvothermal reaction of CZTSe and a sulfurization post-annealing.
• The Se2− is gradually replaced by the S2− when increasing the sulfurization time.
• The optical band gap becomes large gradually.
Cu2ZnSn(SxSe1−x)4 nanocrystals have been successfully synthesized by a novel two-step route involving a solvothermal reaction of Cu2ZnSnSe4 and a sulfurization post-annealing. The Se2− is gradually replaced by the S2− to form the CZTSSe solid solutions with a tetragonal structure when increasing the sulfurization time. The A1 Raman modes of CZTSSe display a typical two-mode behavior, revealing that S composition plays an important role on tuning the vibrating modes. The optical band gap becomes large gradually from 0.91 to 1.30 eV with increasing S content from 0 to 0.76. CZTSSe nanocrystals derived from this method can be used as low-cost absorber layer for photovoltaic applications.
Journal: Materials Letters - Volume 150, 1 July 2015, Pages 12–15