2018年
Rod-shaped Zn-Ag-In-Te nanocrystals with wavelength-tunable band-edge photoluminescence in the near-IR region
Journal of Materials Chemistry C
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- 巻
- 6
- 号
- 8
- 開始ページ
- 2034
- 終了ページ
- 2042
- 記述言語
- 英語
- 掲載種別
- 速報,短報,研究ノート等(学術雑誌)
- DOI
- 10.1039/c7tc05624a
- 出版者・発行元
- Royal Society of Chemistry
Rod-shaped nanocrystals (NCs) composed of ZnTe-AgInTe2 solid solution ((AgIn)xZn2(1-x)Te2, ZAITe) were synthesized in a 1-dodecanethiol solution. The resulting ZAITe NCs of 4-5 nm in width and 16-18 nm in length showed exciton peaks in the absorption spectra, regardless of their composition. The energy gap was enlarged from 1.2 to 1.6 eV by decreasing the x value of the NCs from 1.0 to 0.25. A sharp photoluminescence (PL) peak was observed in each PL spectrum of the NCs with x values of 1.0-0.5, assignable to band-edge emission, while NCs with x = 0.25 showed an additional broad PL peak originating from the defect sites due to the increased non-stoichiometry of NCs. With a decrease in x from 1.0 to 0.25, the band-edge PL peak was blue-shifted from 1010 to 809 nm in the near-IR region, accompanied by a decrease in the corresponding PL quantum yield from 47% to 0.07% due to the diminution of radiative recombination rate.
- リンク情報
- ID情報
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- DOI : 10.1039/c7tc05624a
- ISSN : 2050-7526
- ISSN : 2050-7534
- eISSN : 2050-7526
- SCOPUS ID : 85042584051