We studied the fluorescence spectrum changes after doping CsPbBr
3
with different amounts of Ga
3+
by an improved one-pot hot-injection method
and photoluminescence quantum yield (PLQY) reached the highest when the molar ratio of Ga
3+
and Pb
2+
was 1∶1
which was 47% blue light. We successfully loaded Ga
3+
-doped perovskite quantum dots onto the cobalt borate crystal material
and found that the fluorescence intensity has no obvious quenching phenomenon for a long time
which enhances the stability of the perovskite quantum.
关键词
Keywords
references
PAN J, SARMAH S P, MURALI B, et al . Air-stable surface-passivated perovskite quantum dots for ultra-robust, single and two-photon-induced amplified spontaneous emission [J ] . J Phys Chem Lett, 2015, 6(24): 5027-5033.
ROO J D, GEIREGATP, NEDELCU G, et al . Highly dynamic ligand binding and light absorption coefficient of cesium lead bromide perovskite nanocrystals [J ] . ACS Nano, 2016, 10(2): 2071-2081.
LI G, RIVAROLAF W R, DAVIS N J L K, et al . Highly efficient perovskite nanocrystal light-emitting diodes enabled by a universal crosslinking method [J ] . Adv Mater, 2016, 28(18): 3528-3534.
YAKUNIN S, PROTESESCU L, KRIEG F, et al . Low-threshold amplified spontaneous emission and lasing from colloidal nanocrystals of caesium lead halide perovskites [J ] . Nat Commun, 2015, 6(20): 8515-8520.
ZHANG F, ZHONGH, CHEN C, et al . Brightly luminescent and color-tunable colloidal CH 3 NH 3 PbX 3 (X = Br, I, Cl) quantum dots: potential alternatives for display technology [J ] . ACS Nano, 2015, 9(4): 4533-4542.
HU F, YINC, ZHANG H, et al . Slow auger recombination of charged excitons in nonblinking perovskite nanocrystals without spectral diffusion [J ] . Nano Lett, 2016, 16(10): 6425-6430.
MAKAROV N S, GUOS, LIU W, et al . Spectral and dynamical properties of single excitons, biexcitons, and trions in cesium-lead-halide perovskite quantum dots [J ] . Nano Lett, 2016, 16(4): 2349-2362.
TAN Z K, MOGHADDAM R S, LAI M L, et al . Bright light-emitting diodes based on organometal halide perovskite [J ] . Nat Nanotechnol, 2014, 9(9): 687.
LIN K B, XING J, QUAN L N, et al . Perovskite light-emitting diodes with external quant um efficiency exceeding 20 per cent [J ] . Nature, 2018, 562(7726): 245-248.
WANG W B, ZHAO D W, ZHANG F J, et al . Highly sensitive low-bandgap perovskite photodetectors with response from ultraviolet to the near-infrared region [J ] . Adv Funct Mater, 2017, 27(42): 1703953-1703958.
YIN G N, ZHAO H, JIANG H, et al . Precursor engineering for all-inorganic CsPbI 2 Br perovskite solar cells with 14.78% efficiency [J ] . Adv Funct Mater, 2018, 28(39): 1803269-1803274.
VELDHUIS S A, BOIX P P, YANTARA, N, et al . Perovskite materials for light-emitting diodes and lasers [J ] . Adv Mater, 2016, 28(32): 6804-6834.
YANG W S, NOH J H, JEON N J, et al . High-performance photovoltaic perovskite layers fabricated through intramolecular exchange [J ] . Science, 2015, 348(6240): 1234-1237.
WU L Y, MU Y F, GUO X X, et al . Encapsulating perovskite quantum dots in iron-based metal-organic frameworks (MOFs) for efficient photocatalytic CO 2 reduction [J ] . Angew Chem Int Ed, 2019, 58(28): 9491-9495.
LIU H, WU Z, SHAO J, et al . CsPb x Mn 1– x Cl 3 perovskite quantum dots with high Mn substitution ratio [J ] . ACS Nano, 2017, 11(2): 2239-2247.
YAO J S, GE J, HAN B N, et al . Ce 3+ -doping to modulate photoluminescence kinetics for efficient CsPbBr 3 nanocrystals based light-emitting diodes [J ] . J Am Chem Soc, 2018, 140(10): 3626-3634.
LI M, ZHANG X, PSOTOLEK K M, et al . An anion-driven Sn 2+ exchange reaction in CsPbBr 3 nanocrystals towards tunable and high photoluminescence [J ] . J Mater Chem C, 2018, 6(20): 5506-5513.
SHAO H, BAI X, CUI H N, et al . White light emission in Bi 3+ /Mn 2+ ion Co-doped CsPbCl 3 perovskite nanocrystals [J ] . Nanoscale, 2018, 10(3): 1023-1029.
HE M L, CHENG Y Z, YUAN R R, et al . Mn-Doped cesium lead halide perovskite nanocrystals with dual-color emission for WLED [J ] . Dyes and Pigments, 2018, 152(45): 146-154.
LUO J J, WANG X M, LI S R, et al . Efficient and stable emission of warm-white light from lead-free halide double perovskites [J ] . Nature, 2018, 563(7732): 541-545.
NEDELCU G, PROTESESCU L, YAKUNIN S, et al . Fast anion-exchange in highly luminescent nanocrystals of cesium lead halide perovskites (CsPbX 3 , X = Cl, Br, I) [J ] . Nano Lett, 2015, 15(8): 5635-5640.
STAM W, GEUCHIES J, ALTANTZIS T, et al . Highly emissive divalent-ion-doped colloidal CsPb 1– x M x Br 3 perovskite nanocrystals through cation exchange [J ] . J Am Chem Soc, 2017, 139(11): 4087-4097.
LIANG Z Q, ZHAO S L, XU Z, et al . Shape-controlled synthesis of all-inorganic CsPbBr 3 perovskite nanocrystals with bright blue emission [J ] . ACS Appl Mater Interfaces, 2016, 8(42): 28824-28830.