Research on the Properties of CsPbBr<sub>3</sub> Quantum Dots Modified by Ion Exchange Resin

Chenhui WANG; Junhu CAI; Xinpei HU; Enguo CHEN; Sheng XU; Yun YE; Tailiang GUO

doi:10.3788/gzxb20225106.0616001

Acta Photonica Sinica, Volume. 51, Issue 6, 0616001(2022)

Research on the Properties of CsPbBr₃ Quantum Dots Modified by Ion Exchange Resin

Chenhui WANG1... Junhu CAI1, Xinpei HU1, Enguo CHEN1,2,*, Sheng XU1,2, Yun YE1,2, and Tailiang GUO12 |Show fewer author(s)

Author Affiliations

¹College of Physics and Information Engineering，Fuzhou University，Fuzhou 350108，China

²Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China（Mindu Innovation Laboratory），Fuzhou 350108，China

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Figures & Tables(8)

Fig. 1. Cesium oleate precursor solution

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Fig. 2. SEM images of anion exchange resin

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Fig. 3. Physical and TEM images of PQDs before and after anion exchange resin treatment

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Fig. 4. Comparison spectrum of stability of PQDs before and after anion exchange resin treatment

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Fig. 5. TRPL spectrum of PQDs before and after anion exchange resin treatment

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Fig. 6. Original spectra of the measured PLQY before and after anion exchange resin treatment

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Table 1. Model and manufacturer of experimental instruments

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Table 1. Model and manufacturer of experimental instruments

Instrument	Model	Manufacturer
SEM	TESCAN MIRA LMS	Tescan
TEM	TECNAI G2 F20	FEI Company
Fluorescence Spectrophotometer	F⁃4600	SHIMADZU
Fluorescence Lifetime Testing System	Tempro⁃01	SHIMADZU
Steady State Transient Fluorescence Spectrometer	FLS⁃980	Edinburgh Instruments
Blast Drying Oven	DHG⁃9055A	Shanghai Huitai
Ultraviolet Analyzer	ZF1⁃Ⅱ	Shanghai Jiapeng

Table 2. Fitting parameters of TRPL spectrum

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Table 2. Fitting parameters of TRPL spectrum

Fitting parameters	Original sample	Modified sample
I₀	6.099	12.144
A₁	4 470.733	1 347.729
t₁/ns	2.010	2.840
A₂	5 187.528	6 255.789
t₂/ns	6.286	12.161
A₃	262.280	2 028.117
t₃/ns	33.975	34.181
R²	0.999 59	0.999 61
τ_avg/ns	10.4	22.2
Fitting equation	$I (t) = A_{1} e^{- \frac{t}{t_{1}}} + A_{2} e^{- \frac{t}{t_{2}}} + A_{3} e^{- \frac{t}{t_{3}}} + I_{0}$
Calculation equation of τ_avg	$τ_{a v g} = \frac{A_{1} t_{1}^{2} + A_{2} t_{2}^{2} + A_{3} t_{3}^{2}}{A_{1} t_{1} + A_{2} t_{2} + A_{3} t_{3}}$

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Chenhui WANG, Junhu CAI, Xinpei HU, Enguo CHEN, Sheng XU, Yun YE, Tailiang GUO. Research on the Properties of CsPbBr₃ Quantum Dots Modified by Ion Exchange Resin[J]. Acta Photonica Sinica, 2022, 51(6): 0616001

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