3:00 PM - ES17.11.05
Discovery of Halide Perovskites—Crystal Chemistry, Photoluminescence and Their Optoelectronic Applications
University of Science and Technology Beijing (USTB)1
Recently, the appearance of halide perovskites has catalyzed an unprecedented revolution in the field of (opto)electronics with tunability in the crystal-structure dimensionality and chemical composition. Our group has previously proposed a useful methodology for the discovery of new rare earth phosphors for LED applications by mineral-inspired prototype evolution and new phase construction via cosubstitution strategy, and many useful phosphors have been reported.1,2 Since it is a challenge to discover the counterparts for rare earth phosphor, our group firstly conducted the investigations on perovskite quantum dots represented by CsPbX3 to target the improved quantum efficiency and enhanced stability, and they also demonstrated potential for liquid crystal display backlight application.3-4 Secondly, in the search of stable lead-free perovskites, hybrid perovskites or perovskites double have been studied by utilizing heterovalent substitution or chemical unit cosubstituion proposed by our group in the phosphor studies.5-6 Our pioneer work on Cs2AgInCl6 crystals, as an example, focused on the structural design principles, crystal structure, and morphology related with solution-based crystal growth habit, band structure, optical properties, and the stability,5 and this compound has now become the “star” materials in the luminescent perovskites. Finally, our recent work on the correlation of the crystal chemistry and photoluminescence behavior of the new zero-dimensional (0D) or two-dimensional (2D) structures will be mainly addressed in this talk, moreover the Mn2+ or other ions doped perovskites, as well as the photoluminescence and optoelectronic applications will be also discussed.
Zhiguo Xia*, and Quanlin Liu, Progress in discovery and structural design of color conversion phosphors for LEDs, Progress in Materials Science, 2016, 84, 59-117.
Ming Zhao, Hongxu Liao, Lixin Ning, Qinyuan Zhang, Quanlin Liu, Zhiguo Xia*, Next-Generation Narrow-band Green-emitting RbLi(Li3SiO4)2:Eu2+ Phosphor for Backlight Display Application, Advanced Materials, 2018, 30(38) 1802489.
Ying Liu, Fei Li, Quanlin Liu, Zhiguo Xia*, Synergetic Effect of Postsynthetic Water Treatment on the Enhanced Photoluminescence and Stability of CsPbX3 (X = Cl, Br, I) Perovskite Nanocrystals, Chemistry of Materials, 2018, 30 (19), pp 6922–6929.
Fei Li, Ying Liu, Hongliang Wang, Qian Zhan, Quanlin Liu, Zhiguo Xia*, Postsynthetic Surface Trap Removal of CsPbX3 (X = Cl, Br, I) Quantum Dots via ZnX2-Hexane Solution toward Enhanced Luminescence Quantum Yield, Chemistry of Materials, 2018, doi: 10.1021/acs.chemmater.8b03442.
Jun Zhou, Zhiguo Xia*, Maxim S. Molokeev, Xiuwen Zhang, Dongsheng Peng, QuanLin Liu, Composition design, optical gap and stability investigations of lead-free halide double perovskite Cs2AgInCl6, Journal of Materials Chemistry A, 2017, 5, 15031–15037.
Jun Zhou, Ximing Rong, Maxim S. Molokeev, Xiuwen Zhang*, Zhiguo Xia*, Exploring the Transposition Effects on Electronic and Optics Properties of Cs2AgSbCl6 via a Combined Computational- Experimental Approach, Journal of Materials Chemistry A, 2018, 6, 2346-2352.