In this work we report a hydrothermal approach for synthesis of zinc stannate (Zn2SnO4) nanocrystals. Our research focused on the effect of the molar ratio of initial chemicals, reaction temperature and reaction duration on the phase composition and the fluorescence properties. Structural and optical properties of the final products were investigated in detail. X-ray diffraction analysis indicated that the Zn2SnO4 nanocrystals possess face-centered cubic crystal structure. Raman scattering spectra exhibit two characteristic vibrational modes of Zn2SnO4 crystals. Optical band gap of Eu3+-doped Zn2SnO4 nanocrystals obviously depends on Eu3+ content. | Communications in Physics, Vol. 25, No. 4 (2015), pp. 327-339 DOI: HYDROTHERMAL SYNTHESIS AND OPTICAL PROPERTIES OF UNDOPED AND Eu3+ -DOPED ZINC STANNATE NANOCRYSTALS NGUYEN DUY THIEN Centre for Materials Science, Faculty of Physics, Hanoi University of Science, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam NGUYEN NGOC TU Sao Do University, 24 Thai Hoc, Sao Do, Chi Linh, Hai Duong NGO NHU VIET Centre for Materials Science, Faculty of Physics, Hanoi University of Science, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam NGUYEN DUY PHUONG Academy of Cryptography Techniques. 141 Chien Thang, Tan Trieu, Thanh Tri, Hanoi LE VAN VU Centre for Materials Science, Faculty of Physics, Hanoi University of Science, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam NGUYEN NGOC LONG Centre for Materials Science, Faculty of Physics, Hanoi University of Science, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam Received 24 October 2015 Accepted for publication 24 December 2015 E-mail: duythien 303@ Abstract. In this work we report a hydrothermal approach for synthesis of zinc stannate (Zn2 SnO4 ) nanocrystals. Our research focused on the effect of the molar ratio of initial chemicals, reaction temperature and reaction duration on the phase composition and the fluorescence properties. Structural and optical properties of the final products were investigated in detail. X-ray diffraction analysis indicated that the Zn2 SnO4 nanocrystals possess face-centered cubic crystal structure. Raman scattering spectra exhibit two characteristic vibrational modes of Zn2 SnO4 crystals. Optical band gap of Eu3+ -doped Zn2 SnO4 nanocrystals obviously depends on Eu3+ content. The room-temperature emission spectra of the undoped Zn2 SnO4 nanocrystals show two broad bands, while the photoluminescence spectra of Eu3+ doped Zn2 SnO4 nanocrystals exhibit the emission peaks related to the radiative intra-configurational f-f transitions of Eu3+ ions. The absorption transitions within .
